3 years ago

PLEASEE PLEASE PLEASEE HURRY

Mathematics

1 answer:

Andrej [43]3 years ago

7 0

It is the letter A your welcome

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A and B are complementary angles. If A = (x + 9) and m B = (7x – 15)° then find the measure of B.

Marina CMI [18]

Answer:

$coplementary \: angles \: = 90° \\ (x + 9)° + (7x - 15)° = 90° \\ (8x - 6)° = 90° \\ 8x = 90 + 6 \\ 8x = 96° \\ x = 12\\ angle \: B. = ((7 \times 12)- 15) \\ = 69°$

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3 years ago

How many video games can you buy with $125 if one video game costs $5

GalinKa [24]

Your answer's 25

You have to divide 125 times 5 to get your answer of 25

<h2><u>Hope this helps</u></h2>

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1 year ago

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Please can someone show me how to work this out step by step without a calculator

Artyom0805 [142]

$2\sqrt8\times8\sqrt2=(2\times8)\sqrt{8\times2}=16\sqrt{16}=16\times4=64$

Alternatively, you can write radicals as rational exponents, so that you get

$2\sqrt8\times8\sqrt2=2\tiems8^{1/2}\times8\times2^{1/2}=2^{3/2}8^{3/2}$

Then recalling that $2^3=8$ , you have

$2^{3/2}8^{3/2}=2^{3/2}(2^3)^{3/2}=2^{3/2}2^{9/2}=2^{12/2}=2^6=64$

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4 years ago

Plz help. I will award pts and brainliest to whoever gives me the answer. This question is worth 10 points in my class. please h

Papessa [141]

Answer:

x = -4

Step-by-step explanation:

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3 years ago

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The angle t is acute and sin t = 6/7 is given use a Pythagorean identity to find cos t

Dennis_Churaev [7]

Answer:

sqrt(1 - 36/49) = +root(13)/7

Step-by-step explanation:

sin^2t + cos^2t is identical to 1 for all t.

(6/7)^2 + cos^2t = 1

1 - 36/49 = cos^2t

hence plus/miuns sqrt(1 - 36/49) = cos(t)

since t is acute, the answer must be positive.

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3 years ago