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4 years ago

What is the value for x ?

Mathematics

1 answer:

CaHeK987 [17]4 years ago

3 0

$\cos x=\sin(90^\circ-x)=\sin 64^\circ$ , thus
$90^\circ-x=64^\circ$
$90^\circ-64^\circ=x$
$\boxed{x=26^\circ}$

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Tanya [424]

Answer:

$\$40000$

Step-by-step explanation:

Let's start by finding Sandra's salary this year.

We are given that she saved $3,360 or 8% of her total salary this year.

Let's represent her total salary this year as "x" and set up an equation:

$\$3360=8\%x\\$

Note that any percentage is equivalent to that number over 100.

$$3360=\frac{8}{100}x$

Multiply 100 to both sides:

$336000=8x$

Divide both sides by 8

$x=42000$

The question states "this year her salary was $2000 more than in the previous year".

This means that her salary in the previous year is equivalent to:

$42000-2000=40000$

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3 years ago

brittany's first four quiz grades are 78 81 69 and 94 what would her next quiz score need to be in order to have a mean score of

mina [271]

The mean is the sum of all numbers divided by the number of numbers. We can set up an equation:

$\sf\dfrac{78+81+69+94+x}{5}=79$

Where 'x' is the next quiz score she need. Solve for 'x'. Multiply 5 to both sides:

$\sf 78+81+69+94+x=395$

Add:

$\sf 322+x=395$

Subtract 322 to both sides:

$\boxed{\sf x=73}$

So her next quiz score needs to be 73 in order to have a mean score of 79 on all her quizzes.

7 0

4 years ago

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VLD [36.1K]

Answer:

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Step-by-step explanation:

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3 years ago

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Learn more about driving on:

brainly.com/question/1071840

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3 years ago

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JulijaS [17]

Answer:

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Hope that answers the question, have a great day!

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3 years ago