PLEASE HELP ASAP I WILL GIVE BRAINSLET TO THE CORRECT ANSWER!!!!!!!!!!

Mathematics

2 answers:

N76 [4]3 years ago

6 0

I THINK!!!!!! (x, y) = (-4, -25) im not completely sure tho

marta [7]3 years ago

5 0

Step-by-step explanation:

substitute y = 7x + 3 in equation 2

9x - 2y = 14

9x - 2(7x + 3) = 14

9x - 14x + 6 = 14

-5x + 6 = 14

-5x = 14 - 6

x = 8 ÷ 5

x = 1.6

subs x = 1.6 into equation 1

y = 7x + 3

y = 7(1.6) + 3

y = 11.2 + 3

y = 14.2

thus, x = 1.6, y = 14.2

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Please help 10 points

liubo4ka [24]

Answer:

i think c

Step-by-step explanation:

5 0

3 years ago

Andrew is 3 times his son’s age. 10 years ago, he was 5 times his son’s age. What are their present ages? Show your work.

PSYCHO15rus [73]

Let's solve this problem step-by-step.

STEP-BY-STEP SOLUTION:

We will be using simultaneous equations to solve this problem.

Let's establish the two equations we will be using to solve the problem.

Let Andrew's current age = a

Let Andrew's son's current age = s

Equation No. 1 -

a = 3s

Equation No. 2 -

a - 10 = 5s

To begin with, we will substitute the value of ( a ) from the first equation into the second equation to solve for ( s ).

Equation No. 2 -

a - 10 = 5s

( 3s ) - 10 = 5s

3s - 5s = 10

- 2s = 10

s = 10 / - 2

s = - 5

Next we will substitute the value of ( s ) from the second equation into the first equation to solve for ( a ).

Equation No. 1 -

a = 3s

a = 3 ( - 5 )

a = - 15

FINAL ANSWER:

Therefore, the present age of Andrew is - 15 and the present age of Andrew's son's is - 5.

It isn't possible for someone to be negative years old, but this is the answer that I ibtained from the equations.

Hope this helps! :)
Have a lovely day! <3

6 0

3 years ago

How do you graph f(x)=|x^2-4|?

Citrus2011 [14]

*Hint: When an equation has | it means the absolute value.

Up in the attachment I have provided above is the way that equation should be graphed.

Because the x is squared, it's known that the graph will have a parabola. The -4 is showing the indent it will have.