please please do a step by step of how to solve the equation and the answer! please and thank you!
Answers
Answer:
Value of x using quadratic formula (x = -4) and (x = -5)
Step-by-step explanation:
Given:
Equation
x² + 9x + 20 = 0
Find:
Value of x using quadratic formula
Computation:
Quadratic formula = [-b±√b²-4ac] / 2a
Given equation;
x² + 9x + 20 = 0
a = 1 , b = 9 , c = 20
By putting value
[-9±√9²-4(1)(20)] / 2(1)
[-9±√81-80] / 2
[-9±√1] / 2
(-9 + 1) / 2 , (-9 - 1) / 2
-8 / 2 , 10 / 2
-4 , - 5
Value of x using quadratic formula (x = -4) and (x = -5)
Related Questions
4
Please! HELP! very easy! will give brainliest!
Answers
Answer:
Tom will need 42 bags of seed.
Step-by-step explanation:
The area of Tom's yard is 630 square feet.
Divide the area (630) by the amount of area that each bag of seed covers (15)
630 divided by 15 is 42. So, Tom will need to use 42 bags of seed to cover his whole yard.
Find the area of the circle. Round to the nearest hundredth.
Answers
Answer:
10?
Step-by-step explanation:
Mhanifa can you please help? Look at the picture attached. I will mark brainliest!
Answers
Answer:
Given rhombus ABCD with
m∠EAD = 67°, CE = 5, DE = 12Properties of a rhombus:
All sides are congruentDiagonals are perpendicularDiagonals are angle bisectorsDiagonals bisect each otherSolution, considering the above properties
1. m∠AED = 90°, as angle between diagonals2. m∠ADE = 90° - 67° = 23° as complementary of ∠EAD3. m∠BAE = 67°, as ∠BAE ≅ ∠EAD4. AE = CE = 5, as E is midpoint of AC5. BE = DE = 12, as E is midpoint of BDThe passengers on Fly Right Airlines have their choice of snacks: peanuts, raisins, or granola. They also have the choice of four beverages: juice, water, milk, or coffee. All choices are equally popular. What is the probability a passenger would choose granola and juice? .
Answers
Answer:
The probability of them picking granola is 1/3
The probability of them choosing juice is 1/4
Step-by-step explanation:
Hope it helps :)
Please Help Me with this Question. I do not understand it.
Answers
Answer: 30
Step-by-step explanation:
the formula for the area of a triangle is base times height divided by 2
A=bh/2
the base in this triangle is 15 and the height is 4
(15)(4)/2
60/2
30
1. Members of a research team are considering three studies related to sleep and learning. The first study involves comparing the scores on a post-study test of learning from two groups of randomly chosen adults, with one group getting at least 7 hours of sleep per night for a week and the other group getting at most 6 hours
of sleep per night for a week. A second study involves asking a random sample of students at a large university to report the average number of hours of sleep they get each night and their college grade point average. A third study involves asking a random sample of high school students in a large school district whether they feel they get enough sleep to stay alert throughout the school day.
Answers
The question is incomplete. The complete question is :
Members of a research team are considering three studies related to sleep and learning. The first study involves comparing the scores on a post-study test of learning from two groups of randomly chosen adults, with one group getting at least 7 hours of sleep per night for a week and the other group getting at most 6 hours of sleep per night for a week. A second study involves asking a random sample of students at a large university to report the average number of hours of sleep they get each night and their college grade point average. A third study involves asking a random sample of high school students in a large school district whether they feel they get enough sleep to stay alert throughout the school day.
Which study appears to look for an association between two variables without actively manipulating either one. What are those variables ?
Solution :
The second study in the context is involved in asking for a random sample of the students at an university to provide a report the average hours of sleep that everybody get each night and also the grade point of their college appears for association between these two variables without actively changing either of one.
These variables are the grade point average of the students and the numbers of hours of sleep.
pls answer c: only put correct answer ty!
Answers
The x variable is for the number of books she buys to read so when x is 0!the cost would be what she paid for the reader.
The answer is B. The cost of the reader
Answer:
i think is either the first one or the last one.
i think it's one of those
Step-by-step explanation:
Please help I need to show all work
Answers
Answer: x=-3 can you mark me brainlyest thanks
Step-by-step explanation:
3(x-6)=2x(x+3)
3x-18=3x+6x
3x-18=9x
-3x -3x
-18=6x
__ __
6 6
x=-3
The function P(h)= 2h- 15 represents the profit a company makes selling h hot dogs. Which is the most appropriate domain of the function?
a : all positive intergers
b : all positive real numbers
c : all positive rational numbers
d : all positive irrational numbers
Answers
The requried most appropriate domain for the function P(h) would be the set of all non-negative real numbers. The domain is b, all positive real numbers.
What is a domain?The domain is defined is a set of values of the independent variable for which there is a certain value of the dependent variable exists in the range of the function.
The function P(h) = 2h - 15 represents the profit a company makes selling h hot dogs. In general, the domain of a function represents the set of all possible input values for which the function is defined.
In this case, the function can be defined for any non-negative value of h, since the company can sell any number of hot dogs, including zero. However, the function may not be defined for negative values of h, since it does not make sense to talk about selling a negative number of hot dogs.
Learn more about the domain here:
https://brainly.com/question/28135761
#SPJ2
35 out of 42 students bought their lunch. How many students out of every 6 bought their lunch?
Answers
Answer:
0.138 students per bought
Step-by-step explanation:
pls help meeeeeeeeeeeeeee
Answers
Answer:
73
Step-by-step explanation:
13+15(4) = 73
On a coordinate plane, what are the center and radius of the circle represented by
(x+3)^2 + (y – 5)^2 = 25?
A. Center: (-3, 5); Radius: 25
B. Center: (3, -5); Radius: 25
C. Center: (3, -5); Radius: 5
D. Center: (-3, 5); Radius: 5
Answers
The answer is D.
Center is (-3, 5) and Radium is 5
10
Find the value of x.
8
9
X
*15
X=
Answers
Answer:
x = 19
Step-by-step explanation:
Here, we want to find the value of x
To get this, we use one of the important circle theorems. This is the theorem of secant segments
We have this that;
8(8 + x)= 9(9 + 15)
64 + 8x = 216
8x =
216-64
8x = 152
x =
152/8
x = 19
The cost of a holiday is £2400. Rana pays a deposit followed by monthly payments, in the ratio deposit:total of the monthly payments=3:5 she makes 6 equal monthly payments. Work out her monthly payment
Answers
Answer:
Monthly installments = £250
Step-by-step explanation:
Given
Total cost of holiday = £2400
Ratio deposit : total of the monthly payments=3:5
Total deposit made = [tex]\frac{3}{3+5} * 2400 = 900[/tex]
Total amount of the monthly payments = 2400 -900 = 1500
She pays six equal installments.
Amount of installments = 1500/6 = 250
Monthly installments = £250
Using proportions, it is found that her monthly payments are of £250.
The deposit is of x.The total of monthly payments the remainder, that is, 2400 - x.According to the ratio, we have that:
[tex]\frac{x}{2400 - x} = \frac{3}{5}[/tex]
Applying cross multiplication:
[tex]5x = 3(2400 - x)[/tex]
[tex]8x = 7200[/tex]
[tex]x = \frac{7200}{8}[/tex]
[tex]x = 900[/tex]
Hence, the monthly payments add to £1500.
She makes 6 equal monthly payments, hence:
[tex]p = \frac{1500}{6} = 250[/tex]
Her monthly payments are of £250.
A similar problem is given at https://brainly.com/question/24372153
Help please.........
Answers
Can someone plz help me
Answers
Answer:
41 degrees
Step-by-step explanation:
All three angles in a triangle must add up to 180 degrees. The picture already tells you that B is 63 degrees. This means A and C should both add up 117 degrees. If A is 2x+8 and B is x+7, then A+B is 3x+15. This means that 3x+15 is equal to 117 degrees.
3x + 15 = 1173x = 117 - 153x = 102x = 102/3x = 34Now that we know that x is 34, we plug it in. X + 7 becomes 34 + 7 degrees which is equal to 41 degrees.
Remove the brackets using the distributive law for the following: -7(2x - 5y)
Answers
?/1 A box contains 5 red marbles and 7 green marbles. Find the probability of drawing a green marble and not returning it to the box and then drawing a red marble?
Answers
Answer: 35/132
Step-by-step explanation:
probability of drawing green marble: 7/12
since the green marble drawn won't be returned to the box, the new total amount of marbles in the box is 11.
probability of red marble: 5/11
then multiply the 7/12 and 5/11 together:
35/132 which is abut 26.5%
Chrome - Test Player
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Robert bought a new flat-screen television. The dimensions of the screen are shown in the diagram.
20 inches
37 inches
What is the approximate length of the diagonal of the television screen?
O A 40 in.
OB. 42 in.
O c. 57 in.
OD. 64 in.
Answers
Answer:
57in
Step-by-step explanation:
20 + 37 = 57in
find the distance between the two points (-7,0) and (-9,-8)
Answers
Answer:
in decimal form it is 8.25
Segment PR and segment QS are diameters of circle U. Find measure of arc PQ.
Answers
Answer:
74
Step-by-step explanation:
64+42=106
180-106=74
You deposit $300 dollars in a savings account the account earns 10% simple interest per year whats the interest after 8 years
Answers
Answer:
$240
Step-by-step explanation:
Given data
Principal= $300
Rate= 10%
Time= 8 years
We know that the expression for the simple interest is given as
SI= PRT/100
Substitute
SI= 300*10*8/100
SI= 24000/100
SI= $240
Hence the interest is $240
Please help:(
A. D: (2, 1, 0, -2, -3), R (1, -3, -3, -3, -4}
B. D: (-3, -2, 0, 1, 2}, R: (-4, -3, 1)
C. D: (-3, -2, 1, 1, 2), R: (1, -3, -4)
D. D (-3, -2, 0, 1, 2), R (1, -3, -3, -3, -4)
Which is the answer?
Answers
Answer c would be the answer hope it helps
Step-by-step ex planation:
1. Place these numbers in order from smallest to largest:
8/5 , -3, 6, 3.1 , -2.5, 1/4, - 3/4 - 3/8
:)
Answers
Answer:
Step-by-step explanation:
-3/8, - 3/4, - 3, - 2. 5, 1/4, 8/5 3.1, 6
Write a proportion comparing the rise to the run for each of the similar slope triangles shown at the right. Then find the numeric value.
Answers
Answer:
AB/CΔ=BC/ΔE {similar triangles}
[tex]2/4=2/4[/tex]
[tex]1/2=1/2\\[/tex]
so numeric value= 1/2
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hope it helps....
have a great day!!
Ginger uses the rule "divide by 3" to make a number pattern. If she starts with 36, what are the next two numbers?
A.12, 6
B.12, 3
C.12, 4
D.36, 32
Answers
Answer:
Step-by-step explanation:
Option C is the correct answer
The radius of Cylinder A measures ____ feet.
14, 7, 10
The radius of Cylinder B measures ____ feet.
1.4, 2.8, 5.7
Answers
Answer:
The radius of Cylinder A measures 7 feet.
The radius of Cylinder B measures 2.8 feet.
Step-by-step explanation:
The radius of Cylinder A measures 7 feet.
because the radious is half of the diameter and 14 is the diameter
The radius of Cylinder B measures 2.8 feet.
Answer:
Cylinder A's radius is 7 because the radius is diameter divided by 2.
Cylinder B's radius is 2.8 because the height of Cylinder A is 5 times bigger than Cylinder B's height.
Step-by-step explanation:
I will give brainliest to first A circular hole was cut from the center of a plastic disc as shown below. The measurements are given in millimeters (mm). Answer choices are 177 330 11,127 11,304
(Middle number says 15 mm btw)
Answers
Answer:
330
Step-by-step explanation:
what is the least common denominator 2 and 7?
Answers
Answer:
14
Step-by-step explanation:
it takes 61 pounds of seed to completely plant an 11- acre field. how many pounds of seed are needed per acre
Answers
Explain: 61 divided by 11 = 5.5454545