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3 years ago

Dot got a 75% on her test. She missed 12 questions. how many questions were on the test

1 answer:

7 0

Well, if it was out of 50, it would be 76%.

So the answer might be 50 questions total, but maybe there was 49 questions total.

I would probably go with 50 questions total.

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Mickey buys a shirt for $12 and a pair of shoes for $25. The sales tax rate is 9.25% how much sales tax must he pay? what is the

Alexeev081 [22]

Answer:

$12 + $25 = $37

9.25% of 37 is 3.4225 (rounds to 3.42)

$37 + $3.42 = $40.42

Sales tax: $3.42

Total amount spent: $40.42

8 0

2 years ago

Need help with this question please!!

lara31 [8.8K]

Answer:

C. 1/2

There are many ways to do this but I'll use substitution.

Step-by-step explanation:

Bottom equation yields x = 4 - 8y

plug that into the top equation results in:

4(4 - 8y) - y = 3y + 7

Simplify this to find y:

-36y = -9

y = 1/4

Plug that into the bottom equation we get:

x = 4 - 2 = 2

Thus, xy = 2(1/4) = 1/2 (C)

7 0

3 years ago

Simplify <br> 1+tan^2 x / tan^2 x <br> a) sin^2 x <br> b) csc^2 x<br> c) sec^2 x <br> d) cos^2 x

rodikova [14]

Answer:

cosec²x is the answer

Step-by-step explanation:

$\frac{1+tan^2x}{tan^2x} \\\\\frac{sec^2x}{tan^2x} \\\\\frac{\frac{1}{cos^2x} }{\frac{sin^2x}{cos^2x} }\\\\\frac{1}{sin^2x}\\\\cosec^2x$

5 0

3 years ago

Please answer 7 and 8 for mark as brainliest

maria [59]

7) A. A variable is an unknown value, and x is unknown. Constants are known values so they cannot have X in it.

8)A again for the same reason as number 7

8 0

3 years ago

The lines shown below are perpendicular. If the green line has a slop of 2/5, what is the slope of the red line?

aivan3 [116]

The slope of the red line that is perpendicular to the green line is: -5/2.

<h3>What are the Slope Values of Perpendicular Lines?</h3>

When one line lies perpendicular to another line, the slope of one must be the negative reciprocal of the other line.

<h3>What is the Negative Reciprocal of a Number?</h3>

If given a number, i.e. a/b, the negative reciprocal of a/b would the opposite value of the reciprocal of a/b.

Reciprocal of a/b is b/a. Negative reciprocal of a/b would therefore be: -b/a.

Given that the slope of the green line is: 2/5. And it is perpendicular to the red line. The slope of the red line would be the negative reciprocal of 2/5.

Negative reciprocal of 2/5 is -5/2.

Therefore, the slope of the red line is: -5/2.

Learn more about slope of perpendicular lines on:

brainly.com/question/1362601

#SPJ1

5 0

2 years ago