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3 years ago

Find the value of y. help pls

Mathematics

1 answer:

Helga [31]3 years ago

3 0

Answer:

y=62.0

Step-by-step explanation:

Cosine rule Formula : √a²+b²-2abcos(angle)

$\sqrt{11^{2}+61^{2}-2 \times 11 \times61\times cos(90) }$ =61.98387

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Am I correct? Please help

skad [1K]

You are correct!
Hope this helps!

6 0

3 years ago

Read 2 more answers

Given the polynomial 2x^3+18x^2-18x-162, what is the value of the constant "k" in the factored form?

maxonik [38]

2x³+18x²-18x-162 =
2(x³+9x²-9x-81)=
2(x²(x+9)-9(x+9))=
2(x²-9)(x+9)=
2(x+3)(x-3)(x+9)

Answer: k=3

7 0

3 years ago

PLSSS HELPPPP I WILLL GIVE YOU BRAINLIEST!!!!!! PLSSS HELPPPP I WILLL GIVE YOU BRAINLIEST!!!!!! PLSSS HELPPPP I WILLL GIVE YOU B

Ratling [72]

Answer:

x = 10, y ≈ 11.2

Step-by-step explanation:

Hi there,

We can find the length x first since we are given the lengths of the other two sides of the bottom right triangle. In order to find the length of x, it is important to know the Pythagorean Theorem and the fact that x is the hypotenuse.

$a^{2}$ + $b^{2}$ = $c^{2}$ ← Pythagorean Theorem

To find x:

$6^{2}$ + $8^{2}$ = $c^{2}$

100 = $c^{2}$

c = 10

Therefore, the value of x is 10.

To find y:

We now know the length of two sides of the upper right triangle. The value of y can be found by using the theorem again.

$a^{2}$ + $10^{2}$ = $15^{2}$

$a^{2}$ + 100 = 225

$a^{2}$ = 125

a = $\sqrt{125}$

a = 11.2 when rounded to the nearest tenth.

Therefore, the value of y is approximately 11.2.

Hope this explanation is useful. Cheers.

3 0

3 years ago

Subtract (x^2+3x-4) -(4x-2x^2-3)

Feliz [49]

Answer:

3 x^2 - x + -1

Step-by-step explanation:

Simplify the following:

-(4 x - 2 x^2 - 3) + x^2 + 3 x - 4

Factor -1 out of -2 x^2 + 4 x - 3:

--(2 x^2 - 4 x + 3) + x^2 + 3 x - 4

(-1)^2 = 1:

2 x^2 - 4 x + 3 + x^2 + 3 x - 4

Grouping like terms, 2 x^2 + x^2 + 3 x - 4 x - 4 + 3 = (x^2 + 2 x^2) + (3 x - 4 x) + (-4 + 3):

(x^2 + 2 x^2) + (3 x - 4 x) + (-4 + 3)

x^2 + 2 x^2 = 3 x^2:

3 x^2 + (3 x - 4 x) + (-4 + 3)

3 x - 4 x = -x:

3 x^2 + -x + (-4 + 3)

3 - 4 = -1:

Answer: 3 x^2 - x + -1

4 0

4 years ago

Write 6 x 10-2 in standard notation.

pochemuha

Answer:

1/600 or 0.00166666 in decimal

Step-by-step explanation:

6*10^-2=1/(6*10^2)=1/(6*100)=1/600

8 0

3 years ago