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Firdavs [7]
2 years ago
10

What is (2a-1)(8a-5)

Mathematics
1 answer:
Umnica [9.8K]2 years ago
5 0

Answer:

16a^{2} - 18a + 5

Step-by-step explanation:

1) Use the grid method to expand the two brackets

2) Collect like terms

3) Form the statement!

(See attached image)

Download pdf
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Working independently, Tina can do a certain job in 12 hours. Working independently, Ann can do the same job in 9 hours. If Tina
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Answer:

Ann would need 3 h to complete the remainder of the Job.

Step-by-step explanation:

Step 1.

The "speed" that each girl has to do the work is determined as:

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Step 2.

The amount of work done by Tina in 9 hours, is obtain multiplying by the "speed" calculated in step 1:

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Step 3.

The remaining job is calculated as 1-\frac{2}{3}=\frac{1}{3}. It means that <em>still remains is one third of the job to be completed</em>.

Step 4.

The time required for Ann to complete the job is calculated dividing the remaining of the job by the "speed" of Ann to do the job.

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Its -3,2,7

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