All categories

4 years ago

Q is directly proportional to r. q is 76 when r is 20. work out q when r is 45.

Mathematics

2 answers:

pashok25 [27]4 years ago

8 0

Q α r
q=kr
thus
k=q/r
when r=20, q=76
hence
k=76/20=
q=76/20r
when r=45 the value of q will be:
q=76/20×45
q=171

tangare [24]4 years ago

5 0

Answer:

q=171

Step-by-step explanation:

Hello there!

In this explanation k is constant and it means that q is some constant amount bigger than r.

q=kr

76=k×20

76÷20=k

k= 3.8

q=3.8r

q=3.8×45

q=171

You might be interested in

Please answer this question:)

kogti [31]

Answer:

your answer will be A. 38.5°

Step-by-step explanation:

m<ZYW=1/2(77)

=38.5

hope it helps..

4 0

3 years ago

Please help step by step plz and thank you

sertanlavr [38]

4 pints of ice cream are used for 6 sundaes

So,

6 sundaes = 4 pints of ice cream

=> 1 sundaes = 4 pints of ice cream/6

=> 1 sundaes = 4/6 pints of ice cream

=> 1 sundaes = 0.66666... pints of ice cream

8 0

3 years ago

What is the solution to the equation 9-3x = 7?

emmasim [6.3K]

Answer:

x = $\frac{2}{3}$

Step-by-step explanation:

Given

9 - 3x = 7 ( subtract 9 from both sides )

- 3x = - 2 (divide both sides by - 3 )

x = $\frac{-2}{-3}$ = $\frac{2}{3}$

4 0

3 years ago

Read 2 more answers

Which of the following is equal to [(x2y3)-2/(x6y3x)2]3 ?

Alona [7]

Answer:

a=√x3y5 or a=−√x3y5

Step-by-step explanation:

4 0

2 years ago

Read 2 more answers

You are dealt one card from a standard 52-card deck. Find the probability of being dealt an ace or a 6.

Ainat [17]

Answer:

2/13

Step-by-step explanation:

Since there's 4 of each card in the deck this means that there're 4 sixes and 4 aces, so 8 cards in a 52 card deck gives the problem 8/52 which equals 2/13

4 0

3 years ago