3 years ago

If 6, 18 and 24 are in proportion, which one is the third proportional number ?

Mathematics

1 answer:

Goshia [24]3 years ago

4 0

Answer:

Step-by-step explanation:

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The difference of Ellen’s age and her sister Mary’s age is 4 years. Ellen is 5 years less than twice Mary’s age.

Paha777 [63]

Answer:

I believe the answer is 9 years old or 8 years old.

3 0

3 years ago

Read 2 more answers

Please help me answer this

dexar [7]

Answer:

Step-by-step explanation:

You are given two matrices A and B.

1. Find 2A by multiplying each element of A by 2:

$2A=2\cdot \left(\begin{array}{ccc}-1&9&2\\10&-10&2\\-5&6&-5\end{array}\right)=\left(\begin{array}{ccc}-2&18&4\\20&-20&4\\-10&12&-10\end{array}\right)$

2. Find 4B by multiplying each element of B by 4:

$4B=4\cdot \left(\begin{array}{ccc}7&-1&-1\\6&-4&-3\\-10&10&-7\end{array}\right)=\left(\begin{array}{ccc}28&-4&-4\\24&-16&-12\\-40&40&-28\end{array}\right)$

3. Subtract two matrices 2A and 4B (from each element of matrix 2A subtract corresponding element of matrix 4B)

$2A-4B=\left(\begin{array}{ccc}-2&18&4\\20&-20&4\\-10&12&-10\end{array}\right)-\left(\begin{array}{ccc}28&-4&-4\\24&-16&-12\\-40&40&-28\end{array}\right)=\left(\begin{array}{ccc}-30&22&8\\-4&-4&16\\30&-28&18\end{array}\right)$