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Lelu [443]
3 years ago
12

Could someone explain me question 9 thank you

Mathematics
1 answer:
nordsb [41]3 years ago
4 0
R1 / r2 = sqrt(m2)  / sqrt(m1)  Notice the numbering system. If the 2 is on the denominator for the r, then it will be in the numerator for the m. You must substitute carefully.

r1 / r2 = sqrt(30) / sqrt(12) 
r1 / r2 = sqrt(2)*sqrt(3)(sqrt(5) / sqrt(3) sqrt(4) but sqrt(4) = 2.

ri / r2 = sqrt(2)* sqrt(3)*sqrt(5) / sqrt(3) * 2 Now you can cancel out sqrt(3)
r1 / r2 = sqrt(2)*sqrt(5) / 2

r1 / r2 = sqrt(10)/2 <<<< answer
B <<< answer. Notice that they put sqrt(2) and sqrt(5) together again.


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svet-max [94.6K]

Answer:

3/7

Step-by-step explanation:

its 3/7 because there are 3 weekend days and there are 7 days in total in one week, so out of the week there is 3 weekend days.

i hope this helps :)

6 0
2 years ago
How many different arrangements of 5 letters can be made from the 26 letters of the alphabet?
VikaD [51]
Answer: P(26,5).

That is all the possible combinations of 5 letters made out from 26 letters.

That is 26! / [ 5! ( 26 - 5)! ] = 26! / [5! 21! ] = 26*25*24*23*22*21! / [ 5! 21!] =

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5 0
3 years ago
Determine the coordinator of the point<br>of intersection of lines<br>3x-2y=13 and 2y+x+1=0​
finlep [7]

Answer:

(3,-2)

Step-by-step explanation:

Given equations of line

3x-2y=13

2y+x+1=0​

=> x = -1 -2y

Point of intersection will coordinates where both equation have same value of (x,y)

top get that we have to solve the both equations by using method of substitution of simultaneous equation.

using this value of x in 3x-2y=13, we have

3(-1-2y) -2y = 13

=> -3 -6y-2y = 13

=> -8y = 13+3 = 16

=> y = 16/-8 = -2

x = -1 - 2y = -1 -2(-2) = -1+4= 3

Thus, point of intersection of line is (3,-2)

3 0
2 years ago
A regular bar is 5 ounces and costs $1.25 A gigantic bar is 2 pounds and costs $6.98.
kolbaska11 [484]

Answer:

An experiment is done to see the health effect of large amounts of aspirin on rats. ... 2. Apples sell for 43 cents a pound. How much do 3.2 pounds of apples cost? ... A solid gold nugget is 23.5 ounces. How much is it worth? 23.5 oz x. $500 lez ... 5. A chocolate bar weighs 4.00 ounces.

Step-by-step explanation:

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2 years ago
A cupcake store manager believes that half of the cupcakes sold are vanilla and that the other half is equally divided between c
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400 cupcakes in total

200 would be vanilla

so 100 would be chocolate and the remaining 100 should be funfetti

A: 100

3 0
2 years ago
Read 2 more answers
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