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3 years ago

Calculate the value of y to the nearest hundredth.

Mathematics

1 answer:

Novosadov [1.4K]3 years ago

5 0

Answer:

y ≈ 9.24

Step-by-step explanation:

Using the cosine ratio in the right triangle.

cos30° = $\frac{adjacent}{hypotenuse}$ = $\frac{8}{y}$ ( multiply both sides by y )

y × cos30° = 8 ( divide both sides by cos30° )

y = $\frac{8}{cos30}$ ≈ 9.24 ( to the nearest hundredth )

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dem82 [27]

Answer:

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Step-by-step explanation:

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7km= 10min

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2 years ago

The price of a pair of shoes is $52. This price is 15% lower than last week. What was the price of the shoes last week? Round yo

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4 years ago

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What is the surface area of this right rectangular prism glass slab with dimensions of 20 inches by 3 inches by 12 inches?

Nata [24]

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3 years ago

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Plz explain how to do this!!!

cestrela7 [59]

Answer:

Step-by-step explanation:

You are trying to find the value of K, so to do that you need to get k by itself (example : K= 3-5 instead of K+5= 3)

So in 1a i would simplify 7k-3k= 4k

then 4k=11

now to get rid of the 4 and get the k alone- you DIVIDE 4k by 4 and divide 11 by 4 cause you need to do it on both sides of the equation, it should look like this.

4k= 11

- = -

4 4

(4k over 4 and 11 over four)

so the answer is k = 2.75 cause 11/4 = 2.75

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3 years ago

One number is 4 more than another. the difference between their squares is 64. what are the numbers

lora16 [44]

We have to set up 2 different equations if we are to solve for 2 unknowns. The first equation is x = y + 4. One number (x) is (=) 4 more than another (y + 4). Since we have determined that x is larger (cuz it's 4 more than y), when we set up their difference, we are going to subtract y from x cuz x is bigger. The second equation then is $x^{2} - y^{2} =64$ . In our first equation we said that x = y + 4, so let's sub that value in for x in the second equation: $(y+4) ^{2} - y^{2} =64$ . Expand that binomial to get $y^{2} +8y+16- y^{2} =64$ . Of course the y squared terms cancel each other out leaving us with 8y + 16 = 64. Solving for y we get that y = 6. Subbing 6 in for y in our first equation, x = 6 + 4 tells us that x = 10. Yay!

5 0

3 years ago