3 years ago

Help with it all, don't understand this

Mathematics

1 answer:

Ganezh [65]3 years ago

5 0

Number 3 it is a factor because if u expand you will see that x+6 will be the answer

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Solve −2x − 15 = 6x + 9.

Sindrei [870]

Answer: $x=-3$

Step-by-step explanation:

Given the equation:

$-2x - 15 = 6x + 9$

You must solve for "x" to find its value.

You can follow these steps:

- Add $2x$ to both sides of the equation:

$-2x - 15+2x= 6x + 9+2x$

$- 15 = 8x +9$

- Subtract 9 from both sides of the equation:

$- 15-9 = 8x +9-9$

$-24 = 8x$

- Divide both sides of the equation by 8. Then you get:

$\frac{-24}{8}=\frac{8x}{8}\\\\x=-3$

6 0

3 years ago

The amount a spring will stretch varies directly with the amount of weight attached to the spring. If a spring stretches 2.1 inc

aleksklad [387]

Answer:

$1.05\ in$

Step-by-step explanation:

we know that

A relationship between two variables, x, and y, represent a proportional variation if it can be expressed in the form $y/x=k$ or $y=kx$

Let

x -----> the amount of weight

y ----- the amount a spring will stretch

we know that

For x=80 lb, y=2.1 in

<em>Find the value of k (constant of proportionality)</em>

$k=y/x$

substitute the values

$k=2.1/80$

The linear equation is

$y=(2.1/80)x$

How far will it stretch when 40 pounds is attached?

For x=40 lb

substitute the value of x in the linear equation and solve for y

$y=(2.1/80)(40)=1.05\ in$

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Pls help me and I’ll give brainliest

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Answer:

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Step-by-step explanation:

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