3 years ago

ASAP!!!!!

1 answer:

8 0

When using substitution, you want to solve an equation for one variable that doesn’t make the equation worse to work with.

The general idea is that you want to find a variable that has a coefficient of 1 or -1.

In 2.5x - 7y = 7.5, both variables have “bad” coefficients.

In 6.2x - y = 1, the y has a coefficient of -1. That’s where you want to start.

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Which two numbers add up to ___ and multiply to ___?can you help me with this? Multiplied 1 adds to 10

irina [24]

Begin by following the herd . . . call the two numbers 'x' and 'y' .

You said that xy=1 , so y = 1/x

You said that x + y = 10, so      x + 1/x = 10

Multiply each side by 'x':    x² + 1 = 10x

Subtract 10x from each side: x² - 10x + 1 = 0

Use the quadratic formula to solve this, and the two solutions
that you get for 'x' are also the two numbers 'x' and 'y' .
They are

   <em>9.89898</em>
and
   <em>0.10102</em>

   (rounded)

8 0

4 years ago

The gray area is the sidewalk. The area of the sidewalk is ___________ square units.

alisha [4.7K]

The final answer will be 72 square units.

Hope this helps !

Photon

6 0

4 years ago

Read 2 more answers

PLEASE HELP I NEED THIS ASAP

vivado [14]

Answer:

you should've paid attention in class :/