4 years ago

Two times the first number added to the second number is -7

Mathematics

1 answer:

hodyreva [135]4 years ago

8 0

2a+b=-7
5a+b=-13

b=-2a-7
5a-2a-7=-13
3a=-6
a=-2=first number

2(-2)+b=-7
-4+b+-7
b=-3=second

You might be interested in

What is the value of 2x^3+7x^2-19x-6 if the value of x is -1

Paul [167]

Answer:

-40

Step-by-step explanation:

Let's input x into all of the slots.

$-2^{2}+-7^{2}+19-6$

Now, let's solve!

$-4-49+19-6$

$-40$

So, the answer is -40!

5 0

3 years ago

One way to compute a 20% tip for a bill is to multiply it by 0.20. A restaurant bill was $35.70. Calculate the tip.

Dafna1 [17]

Answer:

7.14

Step-by-step explanation:

7 0

3 years ago

Read 2 more answers

Abram and Fred leave opposite ends of a bike trail 12 miles apart and travel toward each other. Abram is traveling 8 mph faster

Dimas [21]

Abram: 10 mph; Fred: 7 mph

8 0

3 years ago

For the equation -4y =8x, what is the constant of variation?

poizon [28]

1. -4y = 8x
y = -8/4x
y = -2x,,,,constant of variation is -2

2. slope = 2/3, y int = 9........y = 2/3x + 9 <==

3. (1,-3)(3,1)
slope = (1 - (-3) / (3 - 1) = (1+ 3) / 2 = 4/2 = 2

y = mx + b
slope(m) = 2
use either point (3,1)...x = 3 and y = 1
now sub and find b, the y int
1 = 2(3) + b
1 = 6 + b
1 - 6 = b
-5 = b

so ur equation is : y = 2x - 5 <==

5 0

4 years ago

Read 2 more answers

Nate Dogg's 4/5 of a mile in 1/6 hour. which fraction represents Nate speed in miles per hour.

Lerok [7]

Answer:

24/5

Step-by-step explanation:

(6) 4/5 ------------ per 1/6h (6)

24/5----------- per 1h

5 0

3 years ago