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3 years ago

Help! Question on khan academy! pls explain

Mathematics

2 answers:

Kipish [7]3 years ago

8 0

Answer:

He will have 10.

Step-by-step explanation:

this is an example of the counting principle.

when you add the numbers of a probability, it will give you the amount you need.

4 + 3 + 3 = 10. hope this helped! branliest plz.

quester [9]3 years ago

6 0

Answer:36
3x4x3
It says combination usually when it says combination it means to multiply.

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Wirte a answer with solution help:(

Dimas [21]

Answer:

h = $\frac{S-2\pi r^2}{2\pi r}$

Step-by-step explanation:

S = 2πr² + 2πrh ( subtract 2πr² from both sides )

S - 2πr² = 2πrh ( isolate h by dividing both sides by 2πr )

$\frac{S-2\pi r^2}{2\pi r}$ = h

4 0

2 years ago

A quantity b varies jointly with c and d and inversely with f. When c is 4, d is 9, and f is 6, b is 18. What is the constant of

xxTIMURxx [149]

Answer:

k = 3

Step-by-step explanation:

Given that b varies jointly with c and d and inversely with f then the equation relating them is

b = $\frac{kcd}{f}$ ← k is the constant of variation

To find k use the condition c = 4, d = 9, f = 6 , b = 18, then

18 = $\frac{k(4)(9)}{6}$ = $\frac{36k}{6}$ = 6k ( divide both sides by 6 )

3 = k

3 0

3 years ago

Read 2 more answers

The radius of a circle is 1 yard. What is the circle's circumference? r=1 yd

matrenka [14]

Answer:

6.3 yards

Step-by-step explanation:

mathematically, to get the circumference of the circle, we will have to use the formula for the circumference of a circle

we have this as;

C = 2 * pi * r

r is 1 yard

c = 2 * pi * 1 = 2pi yards = 6.3 yards

5 0

3 years ago

How to do this step by step?

serg [7]

The answer is 27.6
angle version of the law of cosines:

cos(C) = (a^2 + b^2 − c^2)/2ab

cos(A) = (b^2 + c^2 − a^2)/2bc

cos(B) = (c^2 + a^2 − b^2)/2ca

cos A = (b^2 + c^2 − a^2) / 2bc
cos A = (10^2+20^2-14^2)/200
cos A = (100+400-196)/200
cos A = (500-196)/200
cos A = (304)/200
cos A = (1.52)
A = cos^-1(1.52) = 40.54 degrees

cos B = (c^2+a^2-b^2)/2ca
cos B = (20^2+14^2-10^2)/280
cos B = (400+196-100)/280
cos B = (496)/280
cos B ≈ 1.77
B = cos^-1(1.77) = 27.66 degrees

we have two methods left to find the measure of angle C:
method 1 :
cos C = (a^2+b^2-c^2)/2ab
cos C = (14^2+10^2-20^2)/140
cos C = (196+100-400)/140
cos C = (-104)/140
cos C ≈ -0.74

C = cos^-1(-0.74) = 111.8 degrees

method 2: 40.54+27.66 = 68.2
180-68.2=111.8

The measure of angle A: 40.54
The measure of angle B: 27.66
The measure of angle C: 111.8

6 0

4 years ago

This one too I always get confused

otez555 [7]

Answer:

AHS

Step-by-step explanation:

Adjacent means same length and the opposiote sides angle is always the same one

4 0

3 years ago