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3 years ago

Value expression 5×4-10×5\-2

1 answer:

4 0

I think -45 is the answer.
remember to always used PEMDAS
5x4 is 20 and 10x5 is 50 and 50 divided by -2 is -25
20 - (-25) = -45

I'm not sure its completely right but i hope this at least helps guide you, if all else fails uses a calculator.

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A rectangle has an area of x square units. The rectangle is dilated to create a new rectangle with an area of 9x square units. D

Alika [10]

The reactangle has an area of x.

So that means two numbers multiplied to each other equal to x. We can just think of itwo numbers that when multiplied equal to x as a and b.

So that means the side lengths are <u />a and b. And ab = x (will be using this right next).

And it was multiplied by some scale factor that made the new area 9x. So if the scale factor is y, then:

$(y\times a)\times (y\times b)=9x$
$y^2ab=9x$
$y^2x=9x$
$y=3$

y can not equal to -3, because the length of a side of any polygon can never be negative.

So the dilation is 3.

And so if the dimension is 5 by 8.

Then the area is $5 \times 8=40$

And so then $x=40$

And then after the dilation, it would be $9x=9(40) = 360$

We could check it another way too. Since we said the scale factor is 3, then:

$( 5 \times 3) \times (8 \times 3) = 15 \times 24 = 360$

So basically 15 by 24 is the new dimensions :)

6 0

3 years ago

Which of the following is not a perfect square A)49 B)121 C)144 D)88

sergey [27]

49 is 7(7)

122 is 11(11)

144 is 12(12)

So D. 88 is the imposter here.

4 0

3 years ago

What is the solution set of {x | x < -3} ∩ {x | x > 5}?

solniwko [45]

x <-3 includes the numbers-4, -5, -6..........

x> 5 includes the numbers 6, 7 , 8.....

here we have to find intersection of these two.

By intersection we mean the values of x that occur in both the sets,

here there is no number or value of x that occur in both the sets.

So answer is empty set

5 0

3 years ago

Find the x !<br> please hurry! Thank you!

wolverine [178]

Step-by-step explanation:

2x+98=180° (angles in straight line )

2x=180-98

x=2/2

x=1

6 0

2 years ago

Read 2 more answers

What is the expression in radical form?

garri49 [273]

Answer:

$\sqrt[5]{25x^{2}y^{4}z^{6} }$

Step-by-step explanation:

going to the 2/5 power is the the fifth root of a square. For fraction exponents going into radical form use the denominator as you root of and use the numerator as the exponent of the rest making sure to multiply any other exponents by that number and when there is no exponent treat it as having an exponent of one for the multiplying.

8 0

3 years ago