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3 years ago

What side lengths should be used to model a rectangle with an area of x2 + 3x – 10 square units?

2 answers:

7 0

( x + 5 ) and ( x – 2 )

You can factor the above binomial and solve for zero. You'll have x^2 + 5x – 2x – 10, which simplifies to your original x^2 + 3x – 10

irina [24]3 years ago

5 0

your answer on e2020 would be B

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Again Please Help I forgot how to do it!

Vladimir79 [104]

Answer:

I'm not sure if I'm correct since I don't really take this stuff, but for a the answer is most likely 1.14 and for number b it's probably 0.9

6 0

3 years ago

Mary walks 4 miles in one hour. At this rate, how long will it take her to walk 25 miles

SVETLANKA909090 [29]

It will take Mary 6 1/4 hours to walk 25 miles at this rate.

Divide the total number of miles by the number of miles per hour.

25/4 hours

This fraction cannot be simplified, but it can become a mixed number.

6 1/4 hours

7 0

3 years ago

13 inches = __ ft<br> PLS HELP PLS

Radda [10]

Answer:

1.083

Step-by-step explanation:

5 0

3 years ago

Read 2 more answers

What is <br> Show your work

zloy xaker [14]

Multiplying both sides of this equation by 3, to eliminate the fraction, we get:

9 + m = 6.

Next, we subtract 9 from both sides to isolate m: m = 6 - 9 = -3

Then m = -3.

Check: Subst. -3 for m in this equation:

9 - 3 6

------- = ------ = 2 (as expected). Thus, m = -3 is correct.

3 3

Problem #10:

4n - 9 = -9 Add 9 to both sides: 4n = -9 + 9 = 0.

Divide both sides by 4: n = 0.

Check: Substitute 0 for n: 4(0) - 9 = -9 is true.

5 0

3 years ago

Simplify 25^ - 1/2 <br><br>Please explain! I know the answer is 1/5 but why?

lisov135 [29]

$(25)^{-\frac{1}{2} }$

When the exponent is negative, you have to make the number a fraction(1 over the number).

For example:

$25^{-2} = \frac{1}{25^{2} }$

$x^{-1} =\frac{1}{x^{1} }$

This gets rid of the negative, but it leaves the exponent

$(25)^{-\frac{1}{2}} = \frac{1}{25^{1/2}}$

When an exponent is a fraction, it is the square root.

For example:

$x^{\frac{1}{3}} = \sqrt[3]{x}$

$x^{\frac{1}{2}} =\sqrt{x}$

$x^{\frac{1}{4}}=\sqrt[4]{x}$

So...

$\frac{1}{25^{1/2}} = \frac{1}{\sqrt{25} } = \frac{1}{5}$

3 0

4 years ago