All categories

4 years ago

Xsquared-8x+18-(5xsquared-10x+7)

2 answers:

6 0

Your answer is 3x^2+2x+9
you add like terms and change the signs of the numbers inside the parentheses before combining the terms
8x^2 - 5x^2 = 3x^2
-8x +10x = 2x because the negative changes the sign to positive
18 - 7 =9

crimeas [40]4 years ago

3 0

I got 2x-4xsquared+11 (:

You might be interested in

Trig: Which complex number's graph is shown?

Andrei [34K]

ANSWER

$2 \sqrt{2} ( \cos( \frac{7\pi}{4} + i \sin( \frac{7\pi}{4} ) )$

EXPLANATION

The complex number shown has coordinates (2,-2)

$z = 2 - 2i$

The modulus is

$|z| = \sqrt{ {2}^{2} + {( - 2)}^{2} }$

$|z| = \sqrt{ 8} = 2 \sqrt{2}$

The argument is

$\theta= \tan^{ - 1} ( \frac{ - 2}{2} )$

$\theta= \tan^{ - 1} ( -1) = \frac{7\pi}{4}$

The polar form is

$2 \sqrt{2} ( \cos( \frac{7\pi}{4} + i \sin( \frac{7\pi}{4} ) )$

The first option is correct.

3 0

4 years ago

Amanda purchases a storage cube that has a volume of 4 Cubic feet She wants to put it on a bookshelf that is 12 inches tall. Wil

goldenfox [79]

Yes... yes it would fit...

3 0

4 years ago

Find the reciproncal of 3/11

ludmilkaskok [199]

Answer: 11/3

Step-by-step explanation: The reciprocal of a fraction is that fraction flipped so the reciprocal of 3/11 is 11/3.

7 0

4 years ago

Read 2 more answers

What is the solution to the system of equations

xxTIMURxx [149]

Answer:

Y = -8.17

X= -4.936

For the first one

Step-by-step explanation:

4x=26+6y

X = 6.5+1.5y

5(6.5+1.5y)-4y = 8

32.5+7.5y-4y = 8

24.5=-3y

Y = -8.17

X= -4.936

7 0

3 years ago

John knows that his first 4 tests grades were 84, 79, 82, and 88. Find John's grade on the test if his average was 83.8.

iren2701 [21]

Answer:

Step-by-step explanation:

The average is the sum of all the grades divided by the number of tests.

83.8 = (84 + 79 + 82 + 88 + x) / 5

419 = 333 + x

x = 86

7 0

3 years ago