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3 years ago

Fifteen more than half a number is 9

Mathematics

2 answers:

Vika [28.1K]3 years ago

4 0

15 > x = 9 I'm pretty sure

Mars2501 [29]3 years ago

3 0

X(1/2)+15=9
x=-12
to get the answer subtract 15 from 9 then divided it by 1/2

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An airplane travels 290 km between Austin and Dallas in 1 h 15 min. What is it’s average speed?

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Solution:

Given that,

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$\begin{array}{l}{1 \text { minute }=\frac{1}{60} \text { hours }} \\\\ {15 \text { minutes }=\frac{15}{60}=\frac{1}{4}} \\\\ {\text { 1 hour } 15 \text { minutes }=1 \frac{1}{4} \text { hours }=\frac{1 \times 4+1}{4}=\frac{5}{4} \text { hours }}\end{array}$

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