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4 years ago

The sum of two numbers is 70. one number is 8 more than the other. what's the smaller number?

1 answer:

4 0

X=8+y
x+y=70

Rewrite the first equation to x-y=8
Copy the second equation x+y=70

Add the two equations and you get 2x=78
Therefore, x=39. Since this is the bigger number the smaller number(y) would have to be 31 because you subtract 8 from x which is 39. 39 is your answer.

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Please solve, -7x+8=-4(x+1)

omeli [17]

Answer: $x=4$

Simplify both sides of the equation.

$-7x+8=-4(x+1)\\-7x+8=(-4)(x)+(-4)(1)(Distribute)\\-7x+8=-4x+-4$

Add 4x to both sides

$-7x+8+4x=-4x-4+4x\\-3x+8=-4$

Subtract 8 from both sides

$-3x+8-8=-4-8\\-3x=-12$

Divide both sides by -3

$-3x/-3=-12/-3\\x=4$

5 0

3 years ago

Read 2 more answers

What’s the square root of -121

irakobra [83]

The answer is 11 i

Explanation:

The square root needs to be a number that can be multiplied by itself and equal the original number.

In this case, the number is 11, 11*11 = 121

However, you are looking for the square root of a negative number, due to this you would add i to the answer,
i = imaginary number, or -

( Depending on your grade/ teacher however, you can put "no solution"

5 0

3 years ago

It’s for question number 2 and please help I would really appreciate that

motikmotik

Answer:

Step-by-step explanation:

Ok so first, you need to do 2.5 - 1.125.

Make 2.5--->2.500

Subtract: 2.500

1.125

=1.375 liters

3 0

3 years ago

Please help!!!!! This is due in a few hours...

Hunter-Best [27]

Peter's meal costed $8.11 in total. Hope this helps :D

7 0

3 years ago

I need help answering

Marizza181 [45]

Fill in the values and calculate:

1/4 * 6 + 3*7 = 6/4 + 21 = 22 1/2

4 0

4 years ago