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3 years ago

In a class of 30 students, 18 are boys.what percent of students are girls

Mathematics

1 answer:

SIZIF [17.4K]3 years ago

4 0

There are 30-18 = 12 girls. Their percentage is

... 12/30 × 100% = 40%

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Tonya and Pearl each completed a separate proof to show that the alternate interior angles AKL and FLK are congruent. Who comple

Keith_Richards [23]

Answer: Pearl

Step-by-step explanation:

In step 2, she justified her step by the definition of vertical angles. However, angles AKL and GKB do not share a common side, meaning they are not adjacent angles.

4 0

2 years ago

Prove that <img src="https://tex.z-dn.net/?f=cos%209x-cos%205x%2Fsin17x-sin3x%3D-sin2x%2Fcos10x" id="TexFormula1" title="cos 9x-

maria [59]

Cos9x - cos5x = -2sin2x.sin7x
sin17x - sin3x = 2sin7x.cos10x
so f(x) = $\frac{-2sin2x.sin7x}{2sin7x.cos10x}$ = $\frac{-sin2x}{cos10x}$

8 0

3 years ago

Kristin decides to spend at most $50 for a birthday dinner at a restaurant, including a 15% tip.,

Dmitry [639]

0.15x + x <(or equal to) 50
Where x is the meal's cost (no tip included)

50 - 15% = 42.5.
x >(or equal to) 42.50.

(nothing is copied content, I copy pasted a number into the right position, feel free to check it mods)

7 0

3 years ago

Find the volume of each ball. use the formula. where v is the volume and r is the radius. record the volume in table A of your s

pochemuha

Answer:

The volume of tennis ball = 38.808 $cm^{3}$ .

Volume of golf ball = 33.523 $cm^{3}$ .

Step-by-step explanation:

Given: The radius of the tennis ball is 2.1cm and the radius of thr golf ball is 2.0cm. the formula is V=4πr(to the 3rd power) /3 .

To find: Volume of tennis ball and golf ball .

Formula used: Volume = $\frac{4 π r^{3} }{3}$ .

pi(π) = $\frac{22}{7}$ .

Explanation : We are given that

Radius of the tennis ball = 2.1 cm

radius of the golf ball =2.0 cm.

We need to find the volume of each ball

So , plugging the given values of radius in above formula

Volume of the tennis = $\frac{4*22(2.1)^{3} }{3*7}$

On simplification we get, volume of tennis ball = 38.808 $cm^{3}$

Volume of the golf ball= $\frac{4*22(2.0)^{3} }{3*7}$

On simplification we get, volume of golf ball = 33.523 $cm^{3}$

Therefore , The volume of tennis ball = 38.808 $cm^{3}$ .

Volume of golf ball = 33.523 $cm^{3}$ .

7 0

3 years ago

Read 2 more answers

A cheetah ran 300 feet in 2.92 secods. What was the cheetahs average speed in miles per hou? Show your work.

Tom [10]

Start by converting 300 feet to miles and 2.92 seconds to hours.

300 feet 1 mile
----------- x -------------- = ?
1 5280 feet

2.92 sec 1 hr
----------------- * ---------------- = ?
1 3600 sec

Reduce each of the above fractions. Then convert 300 feet
-------------- to the
2.92 sec

equivalent speed / rate in mph using the converstion factors you derived earlier.

6 0

3 years ago