2 years ago

Dominic took a 20-question online quiz. He received 5 points for every correct answer. For every

Mathematics

1 answer:

Gennadij [26K]2 years ago

8 0

Answer:

X+20=2 i think this is a little above my head

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A Jar contains n nickels and d dimes. There are 22 coins in the jar, and the total value of the coins is $1.55.

kotegsom [21]

They is 9dime and 13 Nickels because 13 x5=65 and 9 x10=90 .So 0.65+ 0.90= 1.55.

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3 years ago

Three times a number, minus 2, is equal to two times the number, plus 7.

WINSTONCH [101]

Answer:

3x - 2 = 2x + 7

Step-by-step explanation:

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3 years ago

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Multiply using a special product formula (6x-8) (6x+8)

ANEK [815]

The correct answer is B.

6x*6x=36x

-8*+8=-64

Thus, our equation is 36x-64

Hope this helps!

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2 years ago

Solve the equation in the interval from 7pi/2 to 13pi/2

Olegator [25]

Answer:

Step-by-step explanation:13.82, 14.47, 20.10

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3 years ago

Your friend claims that it is possible to draw a right triangle where the cosine of either angle (theta) is exactly the same val

avanturin [10]

Answer:

B. No

$Cos \ \theta\neq Cos (90-\theta)\textdegree$

Step-by-step explanation:

-A right angle triangle has two complimentary acute angles and one right angle.

- $\theta$ is usually one of the acute angles and is equivalent to 90º minus it's complimentary acute angle.

-Complimentary angles add up to 90º.

#For complimentary angles:

$Sin \ \theta=Cos \ (90-\theta)\textdegree\\\\Cos \ \theta=Sin(90-\theta)\textdegree\\\\\therefore Cos \ \theta\neq Cos (90-\theta)\textdegree$

The two acute angles cannot have the same Cosine value.

Hence, she's not correct.

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2 years ago