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3 years ago

Find the zeros Factor the quadratic by checking factor pairs. 9x^2 + 39x + 42

Mathematics

1 answer:

pshichka [43]3 years ago

5 0

Answer:

when this quadratic is equal to 0

3(3x^2+13x+14)=0

3(3x+7)(x+2)=0

3 is not equal to 0

therefore (3x+7) or(x+2)=0

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Convert 2 Liters to gallons. Use the fact that 1 gal.= 3.8L.

iris [78.8K]

we know that

1 gal.= 3.8L

we can also write as

3.8L=1 gal

Firstly, we will find for 1L

so, we can divide both sides by 3.8

$\frac{3.8}{3.8} L=\frac{1}{3.8}gal$

$1 L=\frac{1}{3.8}gal$

now, we will multiply both sides by 22

$22*1 L=22*\frac{1}{3.8}gal$

$22L=5.78947 gal$

$22L=5.8 gal$

so, option-b.............Answer

8 0

3 years ago

Solve for x: 2|х - 3 |+1 = 7

Rasek [7]

When using problems like this use mathaway love

5 0

3 years ago

What are all the fractors of 21 and of 30?

iren2701 [21]

21= 1,3,7,21
30= 1,2,3,5,6,10,15,30

common factors= 1,3

8 0

4 years ago

Make 54/2 to a mixed numbers

Burka [1]

Answer: 27

Step-by-step explanation: Look below for an attached explanation.

Hope this helps!

4 0

3 years ago

4. A river tour boat is going down a stream to a park for lunch and then back up. It is a 60-mile round trip. On

DiKsa [7]

Answer:

The speed of the boat in still water is 10 miles / hour

Step-by-step explanation:

The trip there, and the trip back are the same -- 30 miles

Let the rate of the boat = x

Let the rate of the water = y

30 = 2*(x + y)

30 = 6*(x - y)

Divide the top equation by 2

Divide the bottom equation by 6

15 = x + y

<u>5 = x - y </u> Add the equations together.

20 = 2x Divide by 2

20/2 = x

x = 10

3 0

3 years ago