3 years ago

What is 4 (2+a) what is the answer please tell me

Mathematics

2 answers:

katen-ka-za [31]3 years ago

7 0

(4)(2+a)
(4)(2)+(4)(a)
= 8+4a
Answer: 4a+8

aksik [14]3 years ago

6 0

8 +4a
4*2+4*a
You multiply each

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(x+5)²=81 need help quick

Vilka [71]

Square root each side
x-5=positive/negative 9
x=14, and -4

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3 years ago

I don’t understand how to find the height

ANTONII [103]

Answer:

height, x is 235 ft

Step-by-step explanation:

From trigonometric ratios:

$\cos( \theta) = \frac{adjacent}{hypotenuse}$

but:

$\theta = 90 \degree - 36 \degree \\ \theta = 54 \degree$

adjacent is x

hypotenuse is 400 ft

$\ \cos ( 54 \degree) = \frac{x}{400} \\ \\ x = 400 \ \cos (54 \degree) \\ x = 235 \: \: feet$

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3 years ago

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Marrisa added 1.56 and 13.47. She got 29.07. What mistake could Marrisa have made?

fomenos

She hadn't lined up the decimal points correctly.

Incorrect way:

13.47
1.56

Correct way:

13.47
1.56

Add them up to get the right answer.

13.47
1.56
+____
15.03

So, the answer is 15.03.

6 0

3 years ago

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Select the correct answer from the drop-down menu.

Mice21 [21]

The rectangular prism has a volume of, 1/4 cubic meter.

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3 years ago

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If a=-3/2 b=5/4 and c=7/8 prove that a(b+c) = ab +ac. Thank you in advance

scoundrel [369]

Answer:

You would figure this out by the method of substitution

Step-by-step explanation:

a= -3/2

b= 5/4

c=7/8

a(b+c) = a(b)+a(c)

Substitute

-3/2(5/4 +7/8) = -3/2(5/4)+-3/2(7/8)

-51/16 =-51/16

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3 years ago