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3 years ago

Factor each completely? A2-7a-18

Mathematics

1 answer:

alisha [4.7K]3 years ago

6 0

$a^{2} -7a-18$ (-9 + 2= -7, -9*2= -18)

(a - 9)(a + 2)

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1/4 + 23/28 - 1 <br><br> please help

AnnZ [28]

Answer:

$\frac{1}{14}$

Step-by-step explanation:

$\frac{1}{4} + \frac{23}{28} - 1 = ?$

First off, let's change everything to a common denominator. This will allow us to add the fractions!

To find a common denominator, we find a number that both 4, 28, and 1 can go into. 28 is the best choice, as 4 goes into it 7 times, 28 goes into it once, and 1 goes into it 28 times.

Let's change the first fraction into a number with a denominator of 28!

$\frac{1}{4} * \frac{7}{7} = \frac{7}{28}$

$\frac{7}{7}$ = 1. Multiplying a number by one doesn't change its value.

The second fraction, $\frac{23}{28}$ , already has a denominator of 28, so we don't have to do anything with it.

Now to the third number, -1:

$-1 = -\frac{1}{1} * \frac{28}{28} = -\frac{28}{28}$

Now, let's add them all up!

$\frac{7}{28} + \frac{23}{28} - \frac{28}{28} = \frac{7 + 23 - 28}{28} = \frac{2}{28}$

One last step, to simplify:

$\frac{2}{28} = \frac{1}{14}$

<h2>Your answer is 1/14!</h2>

8 0

3 years ago

Fred bought 5 liters of liquid laundry detergent, 3,270 millimeters of fabric softener, and 2.6 liters of bleach

valentinak56 [21]

Answer:

i don't get what you need answered in this????

Step-by-step explanation:

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3 years ago

8m^3 + 2m^3 + 49m^2 .

zimovet [89]

Answer:

$m^2(10m+49)$

Step-by-step explanation:

$Given \ \ 8m^3+2m^3+49m^2\\\\=m^3(8+2)+49m^2 \ \ \ \ \ \ \ (adding\ like\ terms)\\\\=10m^3+49m^2\\\\=10m\times m^2+49m^2\\\\=m^2(10m+49)$

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3 years ago

four friends contributed the sum of money to a charitable organization in the ratio 1:3:5:7. if the largest amount contrebuted i

suter [353]

9514 1404 393

Answer:

birr 80

Step-by-step explanation:

The total number of ratio units is 1+3+5+7 = 16. The largest amount is represented by 7 ratio units, so is 7/16 of the total. The total contributed is ...

16/7 × (birr 35) = birr 80

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3 years ago

Joshua has 390 photos. He pasted 6 photos in each page. How many pages does

MariettaO [177]

Answer:

Step-by-step explanation:

Joshua has 390 photos, you need to divide that number by the each amount of photos in each page to figure out how many pages he needs to paste all them.

So you'd divide it like. 390 / 6

And that gives you 65.

5 0

2 years ago

Read 2 more answers