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2 years ago

The figures are similar. Find x. Brainiest to the correct person!

Mathematics

2 answers:

kolbaska11 [484]2 years ago

7 0

Answer:

x= 6 and 2/3 or 6.6 repeating.

Step-by-step explanation:

9/4 is 2.25 then we take 15 and divide it by 2.25 in order to get 6.6 repeating and that should be the answer.

ad-work [718]2 years ago

4 0

Its 10 if its scaled down.

9-4 is 5 so it went down 5
15-5 is 10.

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The diagonals of a quadrilateral bisect at right angles. What type of quadrilateral is this?

arsen [322]

square

Step-by-step explanation:

8 0

2 years ago

You are given the parametric equations x=2cos(θ),y=sin(2θ). (a) List all of the points (x,y) where the tangent line is horizonta

vladimir1956 [14]

Answer:

The solutions listed from the smallest to the greatest are:

x: $-\sqrt{2}$ $-\sqrt{2}$ $\sqrt{2}$ $\sqrt{2}$

y: -1 1 -1 1

Step-by-step explanation:

The slope of the tangent line at a point of the curve is:

$m = \frac{\frac{dy}{dt} }{\frac{dx}{dt} }$

$m = -\frac{\cos 2\theta}{\sin \theta}$

The tangent line is horizontal when $m = 0$ . Then:

$\cos 2\theta = 0$

$2\theta = \cos^{-1}0$

$\theta = \frac{1}{2}\cdot \cos^{-1} 0$

$\theta = \frac{1}{2}\cdot \left(\frac{\pi}{2}+i\cdot \pi \right)$ , for all $i \in \mathbb{N}_{O}$

$\theta = \frac{\pi}{4} + i\cdot \frac{\pi}{2}$ , for all $i \in \mathbb{N}_{O}$

The first four solutions are:

x: $\sqrt{2}$ $-\sqrt{2}$ $-\sqrt{2}$ $\sqrt{2}$

y: 1 -1 1 -1

The solutions listed from the smallest to the greatest are:

x: $-\sqrt{2}$ $-\sqrt{2}$ $\sqrt{2}$ $\sqrt{2}$

y: -1 1 -1 1

6 0

2 years ago

Please help me<br><br> b minus 3/4 = 7/10

RoseWind [281]

B - 3/4 = 7/10
add 3/4 to both sides to isolate the b
b = 7/10 + 3/4
b = 28/40 + 30/40
b = 58/40
b = 1 18/40
b = 1 9/20

5 0

3 years ago

Read 2 more answers

Natalie had a job after school. She worked 25 hours a week and got paid $6.25 an hour. How much money would she earn for two wee

erastovalidia [21]

Answer:

312.5

Step-by-step explanation:

25 x 2, for two weeks of work = 50

50 x 6.25 = 312.5

6 0

2 years ago

Read 2 more answers

Maddie has 180 coins. Of these coins, 1/12 are dimes. About how many dimes does she have?

tia_tia [17]

Remember that "of" means to multiply.
(1/12) of 180 coins are dimes. The number of dimes will be
(1/12)*180 = 180/12 = 15

8 0

3 years ago