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3 years ago

Please help! 20 points and brainly!!

Mathematics

1 answer:

boyakko [2]3 years ago

3 0

Answer: 7/21 is the answer because 7 * 2 = 14 and 21*2=42

Step-by-step explanation:

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Simplify the expression by using a double-angle formula. 2 sin 31°cos 31°

qwelly [4]

The double angle formula for the sine is

$\sin(2x) = 2\sin(x)\cos(x)$

The right hand side is exactly your expression, where $x = 31^\circ$

So, rewriting the expression from right to left, we have

$2\sin(31^\circ)\cos(31^\circ) = \sin(2\cdot 31^\circ) = \sin(61^\circ)$

6 0

3 years ago

Marion flipped a coin three times. What is the probability that exactly two heads appeared?

Readme [11.4K]

Probability of getting heads: 1/2

Probability to get 2 heads out of three tries is: 1/8
Work: 1/2 x 1/2 x 1/2 = 1/8

7 0

3 years ago

Question #2:

cluponka [151]

Answer:

$\$17.59\ per\ hour$

Step-by-step explanation:

we know that

The Susan's hourly wage, must be equal at least to the sum of her monthly household expenses divided by the number of hours worked at month

Remember that

$1\ year=52\ weeks\\1\ year=12\ months$

She works 40 hours per week

$40(52)=2,080\ hours\ per\ year$

$2,080/12=\frac{520}{3}\ hours\ per\ month$

<em>Find out the monthly household expenses</em>

Sum all the expenses

Rent+ Monthly Bills+Entertainment and Food+Savings

substitute the values

$\$875+\$1,276+\$648+\$250=\$3,049$

Find out the hourly wage

$\$3,049:\frac{520}{3}\ hours=\$17.59\ per\ hour$

3 0

3 years ago

I NEED THE ANSWER ASAP PLEASE HELP!!

maksim [4K]

Answer:C

Explanation:none

8 0

3 years ago

Which value or values for the variable c from the set below will make 2 + 0.5c < 2c true

Tcecarenko [31]

B should be the answer but I’m not that sure

7 0

3 years ago