Answers
Answer:
C. 15
Step-by-step explanation:
1. First, let's solve the system of equations; [tex]-m - n = 5, m - n = -3[/tex]
Solve -m - n = 5 for m.
[tex]-m -n = 5[/tex] [tex]-m-n+n=5+n[/tex] [tex]-m = n + 5[/tex] [tex]\frac{-m}{-1} = \frac{n+5}{-1}[/tex] [tex]m = -n - 5[/tex]Substitute -n - 5 for m in m - n = -3.
[tex]m - n = -3[/tex] [tex]-n - 5 - n = -3[/tex] [tex]-2n-5=-3[/tex] [tex]-2n-5+5=-3+5[/tex] [tex]-2n = 2[/tex] [tex]\frac{-2n}{-2} = \frac{2}{-2}[/tex] [tex]n = -1[/tex]Substitute -1 for n in m = -n - 5.
[tex]m = -n - 5[/tex] [tex]m = -(-1) - 5[/tex] [tex]m = 1 - 5[/tex] [tex]m = -4[/tex]2. Okay, now that we know m = -4 and n = -1, let's solve for m^2 -n^2.
[tex]m^2-n^2[/tex] [tex](-4)^2-(-1)^2[/tex] [tex]16 - (-1)^2[/tex] [tex]16 - 1[/tex] [tex]15[/tex]Therefore, the answer is C. 15!
Answer:
c 15
Step-by-step explanation:
-m-n=5
m+n=-5
(m+n)×(m-n)=m²-n²
m²-n²=-3×-5=15
Related Questions
Please help me fast I am confused!!!
Answers
Answer:
The second choice.
Step-by-step explanation:
A linear functions graph is a straight line.
This is a fun money give away answer what is 300 x j =900
hint:it is between 4 and 1 so let me see what y'all got
I will take it down in the next 5 minutes.
Answers
Evaluate V.
V=LWH
L=3. W = 2. H= 1
Answers
Answer:
Answer is 6cm³
Step-by-step explanation:
V = 3 × 2 × 1
= 6cm³
Pablo can wash 6 cars in 40 minutes at this rate how many cars can Pablo wash in 4 hours
Answers
Answer:
16
Step-by-step explanation:
convert 40 minutes to hours
[tex] \frac{40 \: minutes}{1} \times \frac{1 \: hour}{60 \: minutes} = \frac{40}{60} = \frac{2}{3} hour[/tex]
multiply to find the number of cars per hour
[tex] \frac{2}{3} \times \frac{6}{1} = \frac{12}{3} = 4 \: cars \: per \: hour[/tex]
multiply again
[tex]4 \times 4 = 16[/tex]
Abdul drove 250 miles using 9 gallons of gas. At this rate, how many gallons of gas would he need to drive 275 miles?
Answers
plz help me with this
Answers
Answer:
12
Step-by-step explanation:
Multiply the binomials using box method or algebra tiles
(x-5)(x+1)
Answers
The answer is B.)
could someone please help answer this thank you, please no spam, will give brainliest, (homework help)
Answers
Answer:
I think it's:
w>2
sorry if I'm wrong
I'll mark BRAINLIEST to whoever answers first.
a * b > a
For this statement to be true, b must be;
greater than 1 or less than one
Select the correct answer.
Answers
Answer:
depends
Step-by-step explanation:
if the value of (a) is negative, then (b) being greater than 1 would make the answer smaller. if (a) is positive, then (b) would have to be greater
Answer:
greater than 1
Step-by-step explanation:
must be greater than 1.
WHY?:
a is possitive = +a
b can't be negative or zero
if b is equal to 0
then a * 0 = 0
0 is lesser than one
what is the justification for step 3 in the solution process
Answers
Answer:
the multiplication property of equality
If f(x) = 52, what is the value of f(-6), to the nearest hundredth (if necessary)?
Answers
Answer:
the correct answer is 52
Allison and Lindsey each measured their bedrooms for new carpeting. They found
that both rooms were square, with the length of Lindsey's room 3 feet longer than
Allison's. If Lindsey needed 225 square feet of carpeting, how many square feet of
carpeting did Allison need?
Answers
Answer:
Step-by-step explanation:
Let's assume that the length of a side of Allison's room as x
So, Lindsey's room = x + 3
If Lindsey's room needs 225 sq. feet of carpeting, then x + 3 = [tex]\sqrt{225}[/tex]
So, x + 3 = 15
Therefore, x = 15 - 3 = 12 ( So, Allison's room has a side of length 12)
Therefore, the carpeting needed = 12 × 12 = 12² = 144 sq. feet
There's your answer!
-3x + b = 6x
solve for x
Answers
Answer:
x = 1/9(b)
Step-by-step explanation:
Step 1: Subtract 6x from both sides.
[tex]-3x + b - 6x = 6x - 6x[/tex] [tex]-9x + b = 0[/tex]Step 2: Subtract b from both sides.
[tex]-9x + b - b = 0 - b[/tex] [tex]-9x = -b[/tex]Step 3: Divide both sides by -9.
[tex]\frac{-9x}{-9}= \frac{-b}{-9}[/tex] [tex]x = \frac{1}{9}b[/tex]Therefore, [tex]x = \frac{1}{9}b[/tex].
What is the solution to this equation?
7- 3√2-x=12
Answers
Solution:
7-3/2-x=12
7-3/14-x
The value of x is -(5 + 3√2).
what is equation?Equations are mathematical statements with two algebraic expressions flanking the equals (=) sign on either side. It demonstrates the equality of the relationship between the expressions printed on the left and right sides. LHS = RHS is a common mathematical formula.
Coefficients, variables, operators, constants, terms, expressions, and the equal to sign are some of the components of an equation. The "=" sign and terms on both sides must always be present when writing an equation.
Given:
7- 3√2-x=12
Now solving
7- 3√2-x=12
Subtract 7 from both side
7- 3√2-x - 7 =12 - 7
- 3√2-x = 5
Now, add 3√2 both side
-3√2 -x + 3√2 = 5 + 3√2
-x= 5 + 3√2
x= -(5 + 3√2)
Hence, the value x is -(5 + 3√2).
Learn more about equation here:
https://brainly.com/question/10413253
#SPJ2
3[-2(8-13)] how to solve it
Answers
Answer:
3 times - 2,times 8-13
You solve the ones in the bracket first
(the rule of BODMAS)
So 8-13 first, then
-2times 8-13,then
Then you get your answer
round 487 to the nearest 10
Answers
In a scale drawing, 1 12 inches represents 12 miles. How many inches would you need to
represent 15 miles?
Please need this soon
Answers
—> first find how many inches are in a mile then find how many feet are in 15 miles. You need to find how many inches are in 15 miles also. Then do F•15•inches
Answer = 950400 inches in 15 miles :) hope this helps!
What is 25% of $30?
Somebody please explain with proof thanks!
Answers
Answer: 7.5$
Step-by-step explanation:
it is 7.5$ because pretend 25% is a quater 4 quaters = 1 $ so if u do 7.5 x 4 it = 30$ hope this helped :)
Each year a certain amount of money is deposited in an account which pays an annual interest rate of so that at the end of each year the balance in the account is multiplied by a growth factor of x = 1 + r. $300 is deposited at the start of the first year, an additional $500 is deposited at the start of the next year, and $400 at the start of the following year.
A) Write an expression for the value of the account at the end of three years in terms of the growth factor .
B) What is the amount (to the nearest cent) in the account at the end of three years if the interest rate is 2%?
Answers
Answer: 5%
Step-by-step explanation:
the standard form of "three thousand four hundred eight."
Answers
Answer:
3,408
Step-by-step explanation:
Answer:
3,408 is the forms of three thousand four hundred eight
Multiply the binomials: (b+8)•(b-2)
Answers
Answer:
[tex]{ \rm{(b + 8)(b - 2)}} \\ \\ = { \rm{ {b}^{2} - 2b + 8b - 16}} \\ \\ = { \rm{ {b}^{2} + 6b - 16}}[/tex]
help
Which lines are perpendicular to the line y –1=1/3(x+2)?
check all that apply
y + 2 = –3(x – 4)
y − 5 = 3(x + 11)
y = -3x – Five-thirds
y = One-thirdx – 2
3x + y = 7
Answers
Therefore, the following choices are perpendicular to y — 1 = 1/3(x + 2):
You’ll have to transform option 1 into its slope-intercept form to see whether its slope is a negative reciprocal to 1/3:
OPTION 1:
y + 2 = -3(x - 4)
Distribute -3 into the parenthesis, and subtract 2 from both sides:
y + 2 - 2 = -3x + 12 - 2
y = -3x + 10
OPTION 5:
You’ll also have to transform option 5 into its slope-intercept form:
3x + y = 7
Subtract 3x from both sides to isolate y:
3x - 3x + y = - 3x + 7
y = -3x + 7
OPTION 3:
Option 3 also has a negative reciprocal slope of -3:
y = -3x - 5/3
Therefore, the following options are the correct answers:
Option 1: y + 2 = -3(x —4)
Option 3: y = -3x - Five-thirds or y = -3x - 5/3
Option 5: 3x + y = 7
Please mark my answers as the Brainliest if you find my explanations helpful:
Help please!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Answers
Step-by-step explanation:
2(x+7)=72 no, because this only changes the value on the right side. so this equation is not about the same equality anymore.
x+7=18 yes, because both sides were transformed by the same operation (division by 2). the equality is still maintained.
2x+7=36 no, because 2x+7 is NOT equal to 2(x+7). resolving 2(x+7) is 2x+14.
x+14=36 no, because again, x+14 is NOT equal to 2(x+7).
(2×x) + (2×7) = 36 yes, because the left side is a valid transformation of 2(x+7).
2x+14=36 yes, because the left side is a valid transformation of 2(x+7).
A unit to express volume is?
Answers
Answer:
Please mark Brian List The answer is Cubic units
Answer:
The unit used to express volume is cubic units
any unit but it should be cubic
like cm³ ml³
Please solve!!!! I have been trying to figure out for the past 20 years of my life>
Answers
Answer:
ergerge
Step-by-step explanation:
Answer:
What is it freaking asking???
Step-by-step explanation:
help me answer these pls!!
Answers
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1st blank - DAB 2nd blank - BCD3rd blank - SSS4th blank - Angle C5th blank - CPCTC 6th blank - Angle C7th blank - 180°8th blank - Angle C 9th blank - 90°I need to understand the process, any help is much appreciated. :)
Answers
Answer:
15 x -5y -6 -2y
-75y -6 -2y
-77-6
help with top one? thankss
Answers
Answer:
$7.90 per pound
Step-by-step explanation:
11.85/3 = half pound = $3.95
3.95x2 = 7.9 = 1 pound
13. Analyze: How much money is 1/2 of a dollar plus 3/4 of a dollar plus 3/10 of a dollar?
I keep forgetting my fractions.
Answers
Answer:
1 dollar & 55 cents
0.5+0.75+0.3=1.55
3. (04.03 LC)
Identify the domain of the exponential function shown in the following graph: (2 points)
Answers
Answer:
x is greater than or equal to 0.
Step-by-step explanation:
The domain is just your X value. In contrast, the range is your Y value. Since we start at and include 0 on the X axis, we continue forever from there. Therefore, X is greater than or equal to 0.