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2 years ago

Expand and simplify 4x + 2 (x - 5)

Mathematics

1 answer:

iragen [17]2 years ago

6 0

Step-by-step explanation:

4x+2x-10

6x-10

is this something is answer

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What is (4x^3+27x^2+45x)/9x

kvasek [131]

$x^{4}$ Answer:

3 $x^{3}$ + $x^{2}$ - 2x times 1

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3 years ago

If tan a = 9／40<br>use trigonometric identities to find the values of sin a and cos a.

Sindrei [870]

Answer:

see explanation

Step-by-step explanation:

Given

tan a = $\frac{9}{40}$ = $\frac{opposite}{adjacent}$

We require the hypotenuse h

Using Pythagoras' identity

h² = 9² + 40² = 81 + 1600 = 1681 ( take square root of both sides )

h = $\sqrt{1681}$ = 41 , thus

sin a = $\frac{opposite}{hypotenuse}$ = $\frac{9}{41}$

cos a = $\frac{adjacent}{hypotenuse}$ = $\frac{40}{41}$

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2 years ago

Describe two ways you can find the measure of <7.

Verizon [17]

Answer:

angle 7= 66

Step-by-step explanation:

Angle 1 is equal to the 114 degrees. And angle 1 + angle 7 = 180. So it would be 114 + angle 7 = 180. So you do 180-114 = 66. So angle 7= 66.

The other way is that 114 + angle 6 = 180, so you do 180-114= 66.

And agle 6 is equal to angle 7, so that's another way you can know that angle 7= 66

5 0

2 years ago

2.03 Quiz: Operations with Matrices

tiny-mole [99]

Answer:

BD is 2x1

CA is 2x1

BC is 2x3

(i think)

Step-by-step explanation:

8 0

3 years ago

What is the value of this expression (12-x)+ y/2 when x=4 and y=8 A. 4 B. 6 C. 8 D. 10

Ludmilka [50]

Answer:

$12$

Step-by-step explanation:

$(12-x)+ \frac{y}{2}$

$(12-4)+ \frac{8}{2}$

$(12-4)+ 4$

$8+4$

$12$

Hope this helps!

5 0

2 years ago

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