MATHEMATICS HIGH SCHOOL

VERY EASY QUESTIONMadison made a mistake when she combined terms. Explain what Madison did wrong? Explain and give an example of what she should have done.

What Madison did step by step:
7-3(4-2x)-10x
7-3(2x)-10x
7-6x-10x
7-16x

Answers

Answer 1
Answer: Her mistake is that she didn't distribute the terms correctly . She subtracted 4 and- 2x , which is incorrect . She had to multiply -3 and the numbers inside the parenthesis .
Answer 2
Answer: the mistake is in combining 4 with -2x because they're not like terms
7-3(4-2x)-10x
7-12-6x-10x
-5-16x

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Find three consecutive even numbers whose sum is 96?
Solve for m: 8(m+5)=16 ?
Can some one help me 2x+y=4Y=2/3x-4

Bob drove 59 miles per hour for 4 hours. How far did Bob drive?

Answers

59 x 4 = 236 is ur answer and equation

Answer:

236 miles.

Explanation:

59 miles * 4 hours = 236 miles

If f(x)=-5x^2-3x+4 what is the value of f(-1)
A:12
B:-2
C:2
D:-12
E:10

Answers

Answer:

C

Step-by-step explanation:

to evaluate f(- 1) , substitute x = - 1 into f(x)

f(x) = - 5x² - 3x + 4 , then

f(- 1) = - 5(- 1)² - 3(- 1) + 4 = - 5(1) + 3 + 4 = - 5 + 7 = 2

Which equation is parallel to y=1/2x+4 and goes through the point (-2, -7)?y=1/2x−6

y= 1/2x−7

y=1/2x+10

y=−2x+1

Answers

Answer:

c

Step-by-step explanation: SJADHJISHDIAJDOQIWDJIQWFWQOFQWOFJQP

Answer:

y=1/2x-6

Step-by-step explanation:

y-y1=x(x-x1)

y-(-7)=1/2(x-(-2))

y+7=1/2(x+2)

y+7=1/2x+1

y=1/2x-6

What is 20% of 90 with the work?

Answers

What you want to do is convert 20% into a decimal. Then you multiply that by 90. So, if 20% was a decimal(In this case it is 0.2) you do 0.2*90 which equals 18. So the answer is 18.
the easy way is:

covert 20% as a fraction

20/100=x/90 and solve it. 

the answer is.... 18 

Match the following problems with their answer, HELP ME PLEASE!!!!!

Answers

Answer:

1. 12.5%

2. 26%

3. 51

4. 16

Step-by-step explanation:

3/24=0.125 -> 12.5%

65/250=0.26 -> 26%

300*0.17=51

0.4*40=16

Which equations have the same pair of solutions? Select all that apply. n(n + 3)(n - 4) = 0 2n(4n + 6)(6n - 4) = 0 0 = 2n(6 - 4n)(4 - 6n) 0 = n(2n + 3)(3n - 2) 2n(2n + 3)(3n - 2) = 0 3n(6n + 9)(9n - 6) = 0

Answers

Answer:

2,4,5,6

Step-by-step explanation:

n=0,4n+6=0\implies n=-(6)/(4)=-(3)/(2)

6n-4=0\implies n=(4)/(6)=(2)/(3)

n=0, n=-(3)/(2),n=(2)/(3)

3.2n(6n-4)(4-6n)=0

n=0

6n-4=0

n=(4)/(6)=(2)/(3)

4-6n=0

n=(4)/(6)=(2)/(3)

4.n(2n+3)(3n-2)=0

n=0

2n+3=0

n=-(3)/(2)

3n-2=0

n=(2)/(3)

5.2n(2n+3)(3n-2)=0

n=0

2n+3=0

n=-(3)/(2)

3n-2=0

n=(2)/(3)

6.3n(6n+9)(9n-6)=0

n=0

6n+9=0

n=(-9)/(6)=-(3)/(2)

9n-6=0

n=(6)/(9)=(2)/(3)

Answer:2,4,5 and 6 equation have same solutions.

Answer:

2, 4, 5, and 6 have the same pair of solutions.

Step-by-step explanation:

1. n(n+3)(n-4) = 0

2. 2n(4n+6)(6n-4) = 0

3. 2n(6-4n)(4n-6n) = 0

4. n(2n+3)(3n-2) = 0

5. 2n(2n+3)(3n-2) = 0

6. 3n(6n+9)(9n-6) = 0

Answers:

1. n = 0, -3, 4

2. n = 0, -3/2, 2/3

3. n = 0, 3/2

4. n = 0, -3/2, 2/3

5. n = 0, -3/2, 2/3

6. n = 0, -3/2, 2/3
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