13. there 11 blue marbles and 7 red marbles in a box. Write the ratio of red marbles to blue marbles. 14. There are 12 apples and 15 oranges in a fruit basket. Write the ratio of apples to oranges.

15. There are 5 blue marbles and 16 red marbles in a box. Write the ratio of blue marbles to red marbles.

16. There are 12 dogs and 7 cats in a park. Write the ratio of cats to dogs.
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= 5

step-by-step explanation:

to find the 15th term substitute n = 15 into the nth term formula

= (- 3 × 15 ) + 50 = - 45 + 50 = 5

answer: solve 5\cdot 2^x=2405⋅2  

x

=2405, dot, 2, start superscript, x, end superscript, equals, 240.

solution

to solve for xxx, we must first isolate the exponential part. to do this, divide both sides by 555 as shown below. we do not multiply the 555 and the 222 as this goes against the order of operations!

\begin{aligned} 5\cdot 2^x& =240 2^x& =48 \\ \end{aligned}  

5⋅2  

x

2  

x

​    

=240

=48

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step-by-step explanation: