Answer:
her score would be -22
Step-by-step explanation:
20-42=-22
Simplify x^3 * x^5 Rewrite the expression in the form x^n
Answer:
x^8
Step-by-step explanation:
ab - bc+ ac, bc - ca+ ab, ca - ab-2bc
Answer:
[tex]ab-2bc+ca[/tex]
Step-by-step explanation:
Complete question is given below
Add:-
ab-bc+ac,bc-ca+ab,ca-ab-2bc
We have to find the result after addition
Now, adding all expression
We get
[tex]ab-bc+ac+bc-ca+ab+ca-ab-2bc[/tex]
Combine like terms then, we get
[tex](ab+ab-ab)+(bc-bc-2bc)+(ac-ca+ca)[/tex]
[tex]ab-2bc+ca[/tex]
Hence,[tex]ab-bc+ac+bc-ca+ab+ca-ab-2bc=ab-2bc+ca[/tex]
kjdhkdjfhgksdjghkdfs
Answer:
40 is the answer
Step-by-step explanation:
Answer:
thanks
Step-by-step explanation:
According to Greg, perfect cherry pies have a ratio of
240
240240 cherries to
3
33 pies.
How many cherries does Greg need to make
9
99 perfect cherry pies?
Answer:1200 pies
Step-by-step explanation: so like, its confusing with all this change into like weird stuff. but just multiply 240 by 5.
Please help!!! ASAP!
PLEASE HELP ME I ONLY HAVE 20 MINUTES!!!!
The height of a tennis ball
tossed into the air is modeled by h(x) = 40x -16x^2, where x is elapsed time in seconds. During what time interval will the tennis ball be at least 15 feet above the ground?
I’m pretty sure it’s D but I need an explanation why!!!
[tex]h(x) = 40x - 16x^2\\h(x) = 15\\40x - 16x^2 = 15\\-16x^2 + 40x - 15 = 0\\[/tex]
Using the quadratic formula we get
[tex]x_1 = 0.5\\x_2 = 2.04[/tex]
Therefore the tennis ball is at least 15 feet above the ground from 0.5 seconds to 2.04 seconds
CAN SOMEONE HELP ME PLEASE????
At the local video store, you can rent a video game for $3. You also have to pay a $10 membership fee. Write an equation to model the total cost, y, of renting x video games for $3 each and the $10 membership fee. Create a table of values. Use values of x from 0 to 5.
What is the total cost of 9 video games and the rental fee?
Answer:
y=3x+10
Step-by-step explanation:
The y-intercept or initial value is 10 as written on the problem and the slope is 3 because it says for each one of them. meaning that the equation will be y=3x+10
Kim and Danielle each improved their yards by planting hostas and ivy. They bought their supplies from the same store. Kim spent $62 on 5 hostas and 4 pots of ivy. Danielle spent $144 on 8 hostas and 12 pots of ivy. What is the cost of one hosta?
Answer:
The cost of one hosta is $6
Step-by-step explanation:
A system of linear equations is a set of two or more equations of the first degree, in which two or more unknowns are related.
Solving a system of equations consists of finding the value of each unknown so that all the equations of the system are satisfied.
In this case, the variables are:
x = price of a hosta .y = price of a pot of ivy.If Kim spent $62 on 5 hostas and 4 pots of ivy, t his is represented by the equation: 5*x +4*y= 62
If Danielle spent $144 on 8 hostas and 12 pots of ivy, t his is represented by the equation: 8*x +12*y=144
So, the system of equations to solve is:
[tex]\left \{ {{5*x+4*y=62} \atop {8*x+12*y=144}} \right.[/tex]
One way to solve a system of equations is through the substitution method, which consists of solving or isolating one of the unknowns (for example, x) and substituting its expression in the other equation. In this way, you obtain an equation of the first degree with the other unknown, and. Once solved, you calculate the value of x by substituting the already known value of y.
Isolating y from the first equation:
[tex]y=\frac{62-5*x}{4}[/tex]
and replacing this expression in the second equation you get:
[tex]8*x +12*\frac{62-5*x}{4}=144[/tex]
Solving:
[tex]8*x +\frac{12}{4}*(62-5*x)=144[/tex]
8*x + 3*(62-5*x)=144
8*x + 3*62 - 3*5*x=144
8*x + 186 - 15*x=144
8*x - 15*x=144 -186
(-7)*x= -42
x= (-42)÷ (-7)
x= 6
The cost of one hosta is $6
x = 1
x = 2
x = 3
x = 4
Answer:
x=-12.8 or −64 /5
Step-by-step explanation:
ok easy as pie
interior plus exterior is 180 degrees
so 180-130=50
we know the last angle = 50
now lets add them all up and they should be equal to 180
all traingles interior angles add up to 180
180=(-21x+1)+(11x+1)+(50)
now solve
180=-21x+1+11x+1+50
180=-10x+52
52-10x=180
subtract 52
-10x=128
-12.8=x
x=-12.8 or −64 /5
What is 4/5 + 3/4 I need it for my homework
Answer:
4/5 + 3/4 = [tex]1\frac{11}{20}[/tex] or 1.55
Step-by-step explanation:
This can be solved by first finding the highest common factors of denominators of the two fractions, i.e. 4 and 5.
The highest common factor of 4 and 5 can be found by multiplying the two numbers as follows:
The highest common factor of 4 and 5 = 4 * 5 = 20
This can now be used to solve 4/5 + 3/4 as follows:
4/5 + 3/4 = ((4 * 4) + (5 * 3)) / 20 = (16 + 15) / 20 = 31 / 20 = [tex]1\frac{11}{20}[/tex] or 1.55
Therefore, we have:
4/5 + 3/4 = [tex]1\frac{11}{20}[/tex] or 1.55
1:30 o clock in words
Gracie made cupcakes for a bake sale. She bought a cake mix for $4.79, a dozen
eggs for $2.99, a bottle of vegetable oil for $6.79, and a can of frosting for $5.25.
What were her total expenses for the cupcakes?
$21.45
$19.82
$18.92
Answer:
She spent 19.82 in all
Step-by-step explanation:
I added them
what is 15267 times 16459 then divide by 7?
Answer:
33297327
Step-by-step explanation:
(15267 * 15267) ÷ 7
= 15267 * 15267
= 233081289 ÷ 7
= 33297327
Hope this helps! :)
how many kilometers will a car travel in t hours at a rate of v km per hour
Answer:
vt km
Step-by-step explanation:
t - time
v - velocity
s - displacement (aka how many killometers)
the formula for s:
s=v×t
Which table represents a linear function?
Answer:
The fourth option, it's the only FUNCTION that is also not exponential
Step-by-step explanation:
PLEASE HELP Michaels home is 12 feet below sea level in his mothers home is 12 feet above sea level Michael says their homes are at opposite elevation is because they are in opposite directions is he correct? Explain. I only have 2 more days to finish my work!
Answer:
Yes, he is correct
Step-by-step explanation:
Represent Michael's home with M and his mother's with H
So, we have:
[tex]M = 12\ ft (below)[/tex]
[tex]H = 12\ ft (above)[/tex]
Required
Is Michael correct?
First, we get the numeric values of the given parameters.
Below sea level means negative:
So:
[tex]M = 12\ ft (below)[/tex] will be rewritten as:
[tex]M = -12[/tex]
Above sea level means positive:
So:
[tex]H = 12\ ft (above)[/tex] will be rewritten as:
[tex]H = 12[/tex]
Two numbers [tex]A\ and\ B[/tex] are said to be opposite if [tex]A + B=0[/tex]
For Michael to be correct:
[tex]M + H = 0[/tex]
Substitute values for M and H
[tex]-12 + 12 = 0[/tex]
[tex]0 = 0[/tex]
Hence, Michael is correct
the length of a rectangular feild exceeds its breadth by 15m and perimeter is 90m. Find its area
Answer:
450
Step-by-step explanation:
Length = l
Breadth = b
l = 15 + b
Perimeter = 90
Perimeter = 2(l + b)
90 = 2(15 + b + b)
90 = 2(15 + 2b)
90 = 30 + 4b
90 - 30 = 4b
60 = 4b
60/4 = b
15 = b
Hence, l = 15 + 15 = 30
Area = l * b
Area = 30 * 15
Area = 450 unit²
Can someone help me with this one
hmmmm put all the ratios in it like ac=8 by putting all values divide it if all part answer come same so your figure is congrenent
a bamboo shoot is 20 inches tall at day zero
Answer:
ok, and?
Step-by-step explanation:
Next time you post a question. Make sure it is complete
Solve the inequality
Answer:
C. y<-4
Step-by-step explanation:
y/-2+3<5y/-2<5-3y/-2<2y<2x-2y<-4
y = 15x + 75
Interpret the slope
Answer:
15
Step-by-step explanation:
The equation of a line is y=mx+b
m= slope
m=15
slope =15
x-intercept(s): (−5,0)
y-intercept(s): (0,75)
Savannah wants to buy a new tablet that costs $140. She has a coupon expiring this week that is for 15% off any item. Next week, the tablet will be on sale for $125. When is it a better deal for Savannah to purchase the tablet, and why?
Answer:
Its better to buy this week because it is cheaper with using coupon.
Step-by-step explanation:
140 x 0.85 = 119
125 > 119
Use the coordinates of the labeled point to find the point slope equation of the line.
Answer:
B
Step-by-step explanation:
Here, we want to find the point-slope equation of the line
We start by getting the y-intercept of the line which is y = 3
The general equation of a straight line is;
y = mx + b
where b is the y-intercept
So, we have;
y = mx + 3
Now, to get m , we insert the point given on the like which is (2,-5)
x = 2 and y = -5
-5 = 2m + 3
-8 = 2m
m = -8/2
m = -4
So the equation of the line is;
y = -4x + 3
This is same as option B
MULTIPLE CHOICE
What do you get when you subtract the actual
number from the estimated number?
A. Absolute Value
B. Error
C. Percentage error
D. Sum
Answer:
C
Step-by-step explanation:
When you subtract the actual number from the estimated number then, its called 'Error''.
Option B is true.
What is mean by Subtraction?Subtraction in mathematics means that is taking something away from a group or number of objects. When you subtract, what is left in the group becomes less.
Given that;
You subtract the actual number from the estimated number.
Now,
We know that;
To find the error , we subtract the actual number from the estimated number.
Hence, We get;
After subtract the actual number from the estimated number, the result is called ''Error''.
Learn more about the subtraction visit:
https://brainly.com/question/17301989
#SPJ2
Which expression is represented by the diagram?
--
--
|
0-6-6-1)
-8-502
-6-1
0-5-(-1)
-5-1
Fencing costs £13.25 per metre.
How much does 12.5 m cost?
Answer:
165.62500 or 165.625 (simplified
Step-by-step explanation:
In order to find the solution you need to multiply £13.25 by 12.5 m.
You can do this in a few ways:
£13.25^12.5£13.25 x 12.5Both of those will get you your answer
165.62500
Need help please !!!!
Answer:
3rd 1
Step-by-step explanation:
because ive done math for 17 years
Mr. T's Tea store has two kinds of tea. Tea A costs $9 per pound and Tea B cost $6 per pound. How many pounds of each should be combined to obtain 150 pounds of tea worth $8 per pound?
Answer:
y=447.3 pounds
x= 297.3 pounds
Step-by-step explanation:
Step one:
given data
Tea A costs $9 per pound and
Tea B cost $6 per pound.
let the number of pounds of Tea A be x
and for Tea B be y pounds
The total cost of the mixture = $8 per pound
hence
9x+6y=8---------1
The total weight of the mixture
150 pounds
x+y=150-----------2
Step two:
9x+6y=8---------1
x+y=150---------2
from eqn 2 x=150-y
put x= 150-y in eqn 1
9(150-y)+6y=8---------1
1350-9y+6y=8
1350-8=9y-6y
1342=3y
divide both sides by 3
y= 1342/3
y=447.3 pounds
put y= 447.3 in eqn 2
x+447.3= 150
x= 150-446=7.3
x= -297.3
x= 297.3 pounds
The Martinex twins, Carlos and Clarita, are trying to find a
way to make money during the summer vacation. When they overhear their aunt complaining about how difficult it is to find someone to care for her pets while she will be away on a trip, Carlos
and Clarity know they have found the perfect solution. Not only do
they have a large, unused storage shed on their property where they
can house animals, they also have a spacious fenced backyard where
the pets can play. Carlos and Clarita are making a list of some of the
issues they need to consider as part of their business plan to care for cats and dogs while their owners are on vacation.
A:Cat pens will require 6ft2 of space, while dog runs require 24ft2. Carlos and Clarita have up to 360ft2 available in the storage shed for pens and runs, while still leaving enough room to move around the cages.
Utilize the information about space available to write a two variable equation to represent the amount of space used for boarding the cats and dogs. Start-up Costs: Carlos and Clarita plan to invest much of the $1280 they earned from their last business venture to purchase cat pens and dog runs. It will cost $32 for each cat pen and $80 for each dog run. Write a two variable equation to represent the start-up costs for boarding the cats and dogs. and
Graph the two equations one the same x, y plane in Desmos
B: Clarita and Carlos realize after looking at the graphed equation models they do not have to use all of the available space nor do they need to use all of the start up money. They decide to explore a system where they can better visualize and plan for up to and including the available space and start up funds.
Change your original equations into inequalities
is screenshot
C:
Of course, Carlos and Clarita want to make as much money as possible from their business, so they are trying to determine how many of each type of pet they should plan to accommodate. They plan to charge $8 per day for boarding each cat and $20 per day for each dog. After surveying the community regarding the pet boarding needs, Carlos and Clarita are confident that they can keep all of their boarding spaces filled for the summer.
So the question is, how many of each type of pet should they prepare for? Their dad has suggested the same number of each, perhaps 12 cats and 12 dogs. Would the dad’s suggestion be possible? Why or why not?
Answer:
attached pic
Step-by-step explanation:
If 9 exercise books books cost N540.00 how many will 14 of such cost.
Answer:
840
Step-by-step explanation:
im probably wrong
Answer: 14 books will cost 840$
Step-by-step explanation: 540/9=60
60= cost of individual book
60*14=840
840= cost of 14 books