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bezimeni [28]
3 years ago
14

Please help, will mark Brainly and if you need help with anything I’ll help with any work you send

Mathematics
1 answer:
inessss [21]3 years ago
6 0

Answer:

The first one is missing (d - 9) so it would be 5(d -9) or when you factor it out 5d - 45

In the second one (d + 7) is missing so it will be 8d(d + 7) so if you factor that out you will receive 8d^2 + 56

Step-by-step explanation:

3d^2 + 18d -21 =(3d -3)( d + 7)

3d^2 -30d +27 =(3d -3)(d - 9)

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How do i divide mixed numbers
Leni [432]

Answer:

Step-by-step explanation:

You change the mixed number to an improper fraction and then divide using keep, change, flip. To change a mixed number to an improper fraction you multiply the large number to the left of the fraction by the denominator. Then you add the product to the numerator. That total is your numerator, and what ever your denominator was before, that's your denominator now.

5 0
3 years ago
A machine paints 340 toy boats in 45 minutes.Which expression equals the rate per hour?
Elenna [48]

Answer:

The expression for rate per hour is \frac{340}{45}\times 60.

Explanation:

Given:

A machine paints 340 toy boats in 45 minutes.

To Find:

Expression equals the rate per hour?

Solution:

Finding the expression for rate per minute:

\text{{The rate per minute expression}} =\frac{\text{{ (number of toys painted in time given)}}}{\text{{(number of minutes taken)}}}

So, rate per minute expression is \frac{(340 toys)}{(45 minutes)} = \frac{340}{45}

Then, rate per hour expression \text{{rate per minute}}\times 60 minutes

So, rate per hour expression is \frac{340}{45}\times60 minutes= 453.334 toys per hour.

Hence, the expression for rate per hour is \frac{340}{45}\times 60

8 0
3 years ago
How do you find the scale factor
Sholpan [36]
Scale factor(smaller length) is larger length over smaller length. Scale factor(larger length) is smaller length over larger length. Add your measurement and your done!
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What is 8 divided by 9414
Minchanka [31]
The answer to what is 8 divided by 9414 is 0.0008498 .
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3 years ago
What is 4 + 7 ?!?!?!?!?
Marina CMI [18]

Answer:

11

Step-by-step explanation:

your welcome bro.

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Read 2 more answers
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