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VMariaS [17]
3 years ago
7

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]3 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]3 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

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At the pet owner’s meeting, there are 20 people who own dog, and 35people who own cat and 9 people own goldfish. Some people own
Margaret [11]

Answer:

4

Step-by-step explanation:

Given that At the pet owner’s meeting, there are 20 people who own dog, and 35people who own cat and 9 people own goldfish. Some people own both catand dog and some people own both gold fish and cat. No dog owners owngoldfish. There are twice as many people who own both goldfish and catthan people who own both dog and cat.

Total no of people =52

The venn diagram attached gives a clear picture

assuming x to be owners of both dog and cat.  Then 2x is for both goldfish and cats.

Totalling all mutually exclusive we get

64-3x=52

x=4

No of owners who own  both cat and dog =4

7 0
3 years ago
I
posledela

Answer:

6(x-8)=5-2x

Step-by-step explanation:

let the number be x

so we have six times the difference between a number and 8

that is 6(x-8).

is equal to 5 less than twice the number ..we have

=5-2x.

therefore, our answer becomes:

6(x-8)=5-2x

5 0
3 years ago
Solve the equation.
Mekhanik [1.2K]

Answer:

3(x_1)=2(3_x)

or,3×_3 =6_2×

or,3×+2× =6+3

or,5× =9

or,× =9/5

4 0
3 years ago
Read 2 more answers
The gas tank of a 2013 Honda Accord holds 17.2 gallons. How many pounds of carbon dioxide are produced by burning an entire tank
cricket20 [7]
One gallon of gasoline (6.3 lbs.) produces about 20 lbs. of carbon dioxide. This may seem weird and untrue, however, most of that weight comes from the oxygen in the air. Following the math on this means that we multiply 17.2 gallons of gas by 20 lbs. of co2 per gallon of gas burned. 
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8 0
3 years ago
Please write step by step of how you got the answer. Thankyou
stealth61 [152]

Answer:

The solution in the attached figure

Step-by-step explanation:

step 1

Place the numbers  -4, 4, 0, and -3 in the left side

Adds the numbers

-4+4+0-3=-3 ----> is correct

step 2

Place the numbers  3, -1, and -2 in the right side

Adds the numbers

-3+3-1-2=-3 ----> is correct

step 3

Place the numbers  1 and 2 in the base side

Adds the numbers

-4+1+2-2=-3 ----> is correct

The solution in the attached figure

7 0
3 years ago
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