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3 years ago

I WILL AWARD BRAINLIEST!! PLEASE HELP!!

Mathematics

1 answer:

eimsori [14]3 years ago

6 0

Answer:

A(...; 9)

x = 57/7

B(4; ...)

y = 16/5

m = 7/5

Step-by-step explanation:

7x−5y=12

For point A(...; 9)

We know y = 9

Substitute it in

7x−5(9)=12

7x -45= 12

Add 45 to each side

7x-45+45=12+45

7x = 57

Divide by 7

7x/7 = 57/7

x = 57/7

For point B(4; ...)

We know x=4

Substitute it in

7(4)-5y =12

28 - 5y =12

Subtract 28 from each side

28-28 -5y =12-28

-5y =-16

Divide by -5

-5y/-5 = -16/-5

y = 16/5

Now we need to find the slope by solving the equation for y

7x -5y = 12

Subtract 7x

-5y= -7x +12

Divide by -5

-5y= -7x +12

-5y/-5 = -7x/-5 +12/-5

y = 7/5 x -12/5

This is in the form y = mx +b where m is the slope

m = 7/5

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Charlie is 4 more than twice as old as Frank. Frank is 3 years younger than Bob,

marysya [2.9K]

Answer:

Step-by-step explanation:

x + 3= 9

x = 6

2x + 4= 2*6 + 4

2x + 4 = 12 + 4

2x + 4 =16

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hope it helps

7 0

3 years ago

Read 2 more answers

Which expression simplifies...

Zina [86]

Answer:

see below

Step-by-step explanation:

If suffices to look at the last term. It must simplify to 4/(3w²), so the exponents of z must match in numerator and denominator, and the ratio of constants must reduce to 4/3.

The exponents of z have the right values in choices B and D, but the ratio of constants only matches in choice D. Looking at the rest of choice D, we see that we can factor 6w²z² from both numerator and denominator, then factor 2 from the remaining numerator to make it match the desired form.

$\dfrac{(12w^2z^4-24w^2z^2)}{18w^4z^2}=\dfrac{6w^2z^2}{6w^2z^2}\cdot\dfrac{2z^2-4}{3w^2}=\dfrac{2(z^2-2)}{3w^2}$

3 0

3 years ago

mary lou is twice geoge's and kate is two years younger than george the sum of all of their ages is 46 how old is everyone

saw5 [17]

Answer:

George is 12, Mary Lou is 24 and Kate is 10.

Step-by-step explanation:

To find these, start by setting George's age as x. This means that we can model Mary Lou's age as 2x, since she is twice as old. We can also model Kate's age as x - 2 since she is two years younger. Now we can add these 3 together and set equal to 46

x + 2x + x - 2 = 46

4x - 2 = 46

4x = 48

x = 12

This means that George is 12.

Mary Lou = 2x

Mary Lou = 2(12)

Mary Lou = 24

Kate = x - 2

Kate = 12 - 2

Kate = 10

3 0