Three numbers are in ratio 2:5:7. The middle number is 75. What are the other two numbers?

Mathematics

2 answers:

Xelga [282]3 years ago

5 0

First number is -30
Second is -105

Tatiana [17]3 years ago

3 0

Answer:

First number - 30

Second number - 105

Step-by-step explanation:

2/5 of 75 would be 30, so it is the answer.

7/5 of 75 would be 105, so it is the answer.

This is how you would solve this problem.

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Pleaseeee help on question 3 and 5 pleaseeeee wuick thank youuuuuuuuu

elena55 [62]

Answer:

3a, 13cm 5, 1:200

Step-by-step explanation:

In the question 3 you just have to divide all of those numbers with that 5000, maybe also make them cm so it makes more sense. So 650m = 65000cm:5000= 13cm

then for the question 5, make the km to cm, so 4.2km would be 420000cm. Then you have to divide that 420000cm with the 21 cm, so 420000:21= 200. Then the scale should be 1:200

I had difficulties with these as well. If you need extra help with the task 3 please pm me :)

7 0

3 years ago

What is the first step when rewriting y=6x^2+18x+14 in the form y=a(x-h)^2+k?

Grace [21]

<h3>Answer:</h3>

Factor 6 from the first two terms.

<h3>Step-by-step explanation:</h3>

By factoring out "a", you can better see what "h" needs to be.

y = 6(x^2 +3x) +14 . . . . 6 factored from first 2 terms
add the square of half the x-coefficient inside parentheses; add the opposite outside: y = 6(x^2 +3x +2.25) +14 -6(2.25)
rewrite as a square; combine the constants: y = 6(x+1.5)^2 +0.5