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3 years ago

I don't understand can some one help me plz

Mathematics

2 answers:

vaieri [72.5K]3 years ago

6 0

The answer is 7.76 because the fraction written as a decimal would be 7.76 and not any of the other choices they want you to find which number is equal to the fraction number

Salsk061 [2.6K]3 years ago

4 0

25/125 = 0.76

So 7 + 0.76 = 7.76.

Therefore the answer will be 7.76.

Hope this helps !

Photon

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Aleks [24]

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Step-by-step explanation:

Solve the following system:

{c + k = 100 | (equation 1)

{11 c + 51 k = 2500 | (equation 2)

Swap equation 1 with equation 2:

{11 c + 51 k = 2500 | (equation 1)

{c + k = 100 | (equation 2)

Subtract 1/11 × (equation 1) from equation 2:

{11 c + 51 k = 2500 | (equation 1)

{0 c - (40 k)/11 = -1400/11 | (equation 2)

Multiply equation 2 by -11/40:

{11 c + 51 k = 2500 | (equation 1)

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Subtract 51 × (equation 2) from equation 1:

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5 0

3 years ago

The cost, £C, of hiring a lorry to travel n miles is given by

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Part A:
C= a + bn

Make the two equations out of the words:
82 = a + b100 * 2.5 = 205 = a + b250
157 = a+ b250

Subtract the two,
205 = a + b250
- ( 157 = a + b250)
48 = a

Find b by substituting in a:
82 = a + b100
82 = 48 + b100
34 = b100
b = 0.34
Answer for part a: a = 48 , b = 0.34

Part B:
C = a +bn <- when n = 300 , put in a and b, then solve
C = 48 + 0.34(300)
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Cost when hiring a lorry to travel 300 miles is 150 pounds

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3 years ago

Read 2 more answers