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Talja [164]
4 years ago
15

Need help please, keep getting different answers

Mathematics
1 answer:
natali 33 [55]4 years ago
5 0

Answer:

15

Step-by-step explanation:

If x is the shorter leg, then x + 5 is the longer leg, and 2x − 5 is the hypotenuse.

Using Pythagorean theorem:

c² = a² + b²

(2x − 5)² = x² + (x + 5)²

4x² − 20x + 25 = x² + x² + 10x + 25

4x² − 20x + 25 = 2x² + 10x + 25

2x² − 30x = 0

x² − 15x = 0

x (x − 15) = 0

x = 0 or 15

Since x can't be 0, x must be 15.

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What is -12(x-12)=-9(1+7x)​
katen-ka-za [31]

Answer:

-3

Step-by-step explanation:

-12(x-12)=-9(1+7x)

-12x+144=-9-63x

-12x+63x=-9-144

51x=-153

x=-153/51=-3

3 0
3 years ago
Find the exact value of the indicated trigonometric function of θ.
Mariana [72]

Answer:

cosθ = -√(35/36)

tanθ = -1/√35

Step-by-step explanation:

We know that

sin²θ + cos²θ = 1

(1/6)² + cos²θ = 1

1 - (1/6)² = cos²θ

35/36 = cos²θ

sec θ = 1/ cosθ

1/ secθ = cos θ

Because secθ < 0, 1/ secθ would also be < 0, so cos θ < 0

cosθ = -√(35/36)

tanθ = sinθ/cosθ = (1/6)/-√(35/36)

= (1/6) / -(√35/6)

= -1/√35

8 0
3 years ago
What transformation of f(x) will result in g(x) ?
Amanda [17]

Answer:

Vertical stretch across the y-axis, reflection across the x-axis, horizontal shift 2 units to the left, and vertical shift 1 unit down

3 0
3 years ago
The diameter of a semicircle is 6 miles. What is the semicircle's perimeter?
koban [17]

Answer:

15.42mi

Step-by-step explanation:

Use the formula for a semicircle's perimeter.

P=\frac{1}{2}\pi *d+d

Plug in 6 for d.

P=\frac{1}{2}\pi*6+6

Let's use 3.14 for \pi, just to make it easier, but of course, if it states to round it to something else, just plug in that many values for \pi.

P=\frac{1}{2}(3.14)*6+6 \\ \\ P=1.57*6+6 \\ \\ P=9.42+6 \\ \\ P=15.42

5 0
3 years ago
Read 2 more answers
Colin buys a car for £45500. It decreases in price 6% per year. How much will it be worth in 3 years?
just olya [345]

Answer:

The answer is 33,710 euros.

Step-by-step explanation:

Start by multiplying 45,550 by 6%. This will give 2,730. over the next three years the price decreases, so multiply 2,730 by 3, which is 8,190. Finally, subtract 45,550 by 8,190 to get 33,710.

5 0
3 years ago
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