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2 years ago

Can you solve this? Solve this with a EXPLANATION to get a Brainliest! Good luck! :D

Mathematics

1 answer:

tamaranim1 [39]2 years ago

3 0

I believe that the answer is D sorry if not though

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In a study of 200 students under 25 years old, 20% have not yet learned to drive. How many students cannot drive? Show me your w

pshichka [43]

Answer: 200x.2=40

Step-by-step explanation:

200 students under 25

20%=.2

times each other make up 40 percent of the students don't know how to drive

5 0

3 years ago

Which of the following statements is true? Will mark BRAINLIEST if the answer is right. 20 points!

frutty [35]

Answer:

this (｡ŏ_ŏ) statement is correct.

J) 180° - m<7 = m<1

4 0

2 years ago

9. Which of the following do you need to know to determine the surface area and volume of a sphere?

Alexxx [7]

Answer:

A: radius of the sphere

Step-by-step explanation:

The formula for surface area is A = 4πr^2

With r being the radius and A the surface area.

For volume it is

V= (4/3)πr^3

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3 years ago

PLEASE PLEASE PLEASE HELP ME YALL‼️‼️‼️‼️‼️

Inessa [10]

Answer:

Hi .. im happy to help

answer is 0.033

Step-by-step explanation:

P = C(4,4)÷C(10,4)

P = 1 ÷ 30

$p = \frac{1 }{30}$

p = 0.033

3 0

2 years ago

If a = √3-√11 and b = 1 /a, then find a² - b²

Serga [27]

If $b=\frac1a$ , then by rationalizing the denominator we can rewrite

$b = \dfrac1{\sqrt3-\sqrt{11}} \times \dfrac{\sqrt3+\sqrt{11}}{\sqrt3+\sqrt{11}} = \dfrac{\sqrt3+\sqrt{11}}{\left(\sqrt3\right)^2-\left(\sqrt{11}\right)^2} = -\dfrac{\sqrt3+\sqrt{11}}8$

Now,

$a^2 - b^2 = (a-b) (a+b)$

and

$a - b = \sqrt3 - \sqrt{11} + \dfrac{\sqrt3 + \sqrt{11}}8 = \dfrac{9\sqrt3 - 7\sqrt{11}}8$

$a + b = \sqrt3 - \sqrt{11} - \dfrac{\sqrt3 + \sqrt{11}}8 = \dfrac{7\sqrt3 - 9\sqrt{11}}8$

$\implies a^2 - b^2 = \dfrac{\left(9\sqrt3 - 7\sqrt{11}\right) \left(7\sqrt3 - 9\sqrt{11}\right)}{64} = \boxed{\dfrac{441 - 65\sqrt{33}}{32}}$

5 0

2 years ago