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Romashka [77]
2 years ago
10

Need help with this today

Mathematics
1 answer:
madam [21]2 years ago
5 0

Answer:

a) 2.5

b) x = 10

Step-by-step explanation:

a) \:  \frac{10}{4}  =  \frac{5}{2}  = 2.5

b) \frac{10}{4}  =  \frac{25}{x}   \\  \\ 10x = 25 \times 4 \\ 10x = 100 \\  \\ x =  \frac{100}{10}  = 10 \\  \\ x = 10

I hope I helped you^_^

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Step-by-step explanation:

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We are supposed to find the mean life span today is greater than 70 years

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<h3>hope it helps!!</h3><h3>please mark brainliest ♡</h3>
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Answer:

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