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3 years ago

Can someone please explain how to do this question, find x.

Mathematics

1 answer:

Zarrin [17]3 years ago

3 0

Answer:

x = 74.7m

Step-by-step explanation:

$\sin(42) = \frac{50}{x} \\ 0.67 = \frac{50}{x} \\ x = 50 \div 0.67 \\ x = 74.7m$

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The dimensions of a rectangle are 2x + 9 and 5x - 6. Which of the following can be used to find the perimeter p of the rectangle

Trava [24]

Answer:

p=14x+6

Step-by-step explanation:

p=2(l+b)

p=2(2x+5x+9-6)

p=2(7x+3)

p=14x+6

8 0

4 years ago

This data set gives the scores of 41 students on a biology exam: {66, 67, 67, 68, 80, 81, 81, 82, 22, 65, 66, 68, 69, 70, 71, 71

Naddika [18.5K]

I think the answer is 74.

3 0

4 years ago

PLEASE HELP its about integers

Anastaziya [24]

Consecutive even integers are 2 apart (2,4,6)
they are
x,x+2,x+4

the sum is 126

x+x+2+x+4=126
3x+6=126
minus 6 from both sides
3x=120
divide both sides by 3
x=40

x+4 is biggest
40+4=44

biggest integer is 44

3 0

3 years ago

The bill (parts and labor) for the repair of a car is $1110.50. The cost of the parts is $575. If the car mechanic chargers $42

valkas [14]

Answer:

Step-by-step explanation:

First you subtract the parts cost from the total bill to see the total cost of labor. After that divide that to 42 to see how many hrs they worked.

3 0

4 years ago

Mary simplified an expression and got 12.9x10^4 for her answer in scientific notation. Her friend, Angela, is telling her that h

Novay_Z [31]

Answer:

Mary simplified an expression. $1.29 \times 10^{5}$ is correct representation in scientific notation.

Solution:

Given that Mary simplified an expression and got $12.9 \times 10^{4}$ for answer in scientific notation.

According to Angela, answer is incorrect. Need to find reason why Angela consider $12.9 \times 10^{4}$ as incorrect scientific notation and find the correct answer.

Let’s understand what is scientific notation of any number.

Scientific notation is a way of representing number between 1 and 10 including 1 and excluding 10 multiplied by appropriate power of 10.

According to Mary’s simplification the number she is getting is 12.9 but in scientific notation, number must be in between 1 to 10

So $12.9 \times 10^{4}$ is not correct scientific notation.

$\text { Let's rewrite } 12.9 \times 10^{4} \text { as } 1.29 \times 10^{1} \times 10^{4}=1.29 \times 10^{5}$

Now we got 1.29 which is in between 1 and 10 multiplied by $10^5$

Hence $1.29 \times 10^{5}$ is correct representation in scientific notation.

8 0

4 years ago