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3 years ago

Write the expression in terms of sine only sin 9x cos 9x

Mathematics

1 answer:

Usimov [2.4K]3 years ago

6 0

$\sin 2\alpha= 2\sin \alpha\cos\alpha\quad\Rightarrow\quad\sin 9x\cos 9x=\frac{1}{2}\sin 18x$

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What is the slope intercept form.

miv72 [106K]

Answer:

y = - $\frac{3}{7} x - 2$

Step-by-step explanation:

slope-intercept form : y = mx + b

Solve for y.

Subtract 3x on both sides. You get --> 7y = -3x - 14

Divide by 7 on both sides. You get --> y = $\frac{-3x-14}{7}$

Simplfy it. -14/7 = 2 so you get y = - $\frac{3}{7} x - 2$

5 0

3 years ago

A gardener wants to run a border around the outside of her garden. She plots it on a grid to plan how much she will

Karo-lina-s [1.5K]

Answer:

16 units.

Step-by-step explanation:

Just to make things easy, let's name the points A(3,9) B(5,9) C(3, 3) and D(5, 3).

Because this question wants perimeter, we'll just use the distance formula twice, then l*2 + w*2 = p.

Distance formula is sqrt((x1 - x2)^2 + (y1 - y2)^2) = d.

sqrt((5 - 3)^2 + (9 - 9)^2) = 2

sqrt((5 - 5)^2 + (9 - 3)^2) = 6.

The distance of points A and B is 2 units, and B to D is 6 units, multiply both by 2, (2*2=4, 6*2=12) and add the values to find 16 units.

Hope this helps, and if this is for OW, I feel your pain.

5 0

3 years ago

with Judy jogging north and Jackie jogging west (on straight roads). When Jackie is 1 mile farther fro m the intersection than J

miskamm [114]

Let the distance of Judy from intersection is x and distance of Jackie from intersection is y.

We convert the given information to equations, step by step.

Point 1: When Jackie is 1 mile farther from the intersection than Judy.

This means y is 1 mile more than x.

So,

y = 1 + x

Point 2: The distance between them is 2 miles more than Judy’s distance from the intersection.

Distance between is x+ y.

So, x+y is 2 miles more than y.

x+y = y + 2
⇒
x = 2

From point 1 we have:

y = 1 + x = 1+ 2 = 3

So,

Distance of Judy from intersection is 2 miles and distance of Jackie from intersection is 3 miles.

4 0

3 years ago

<img src="https://tex.z-dn.net/?f=3%20%5Csqrt%5B3%5D%7B%20x%20%2B%202%7D%20%20%3D%2012" id="TexFormula1" title="3 \sqrt[3]{ x +

joja [24]

Answer:dont know

Step-by-step explanation:

sorry

8 0

2 years ago

55 mi / h = ____ ft / s <br> a. 8.7 <br> c. 80.7 <br> b. 26.9 <br> d. 806.7

Tcecarenko [31]

The answer is c. If the answer is wrong i am sorry

4 0

3 years ago