With the b2+b- 12 your gonna want to do this
b2+b-12
b2+4b-3b-12
which is the sum product
after doing that you wanna common the factors from the two pairs. Which is b2+4b-3b-12 then you do you parentheses around b(b+4)-3(b+4) just like that after you do that then you rewrite it in factored form b(b+4)-3(b+4) you then want to rewrite it to this (b-3)(b+4) after that your solution will be (b-3)(b+4) for the first one.

7 0

2 years ago

Read 2 more answers

Solve the equation 3b1b-8=4

joja [24]

Answer:

b = 2

Step-by-step explanation:

3b1b-8 = 4

+8 +8

3b1b = 12

3b^2 = 12

/3 /3

b^2 = 4

$\sqrt{b^2}$ $\sqrt{4}$

b = 2

6 0

3 years ago

<img src="https://tex.z-dn.net/?f=%20as%20%5C%3A%20a%20%5C%3A%20dicimal%20%5C%3A%20%5Cfrac%7B11%7D%7B40%7D%20%20%3D%200.275%20%5

kakasveta [241]

Answer:

0.0825

Step-by-step explanation:

33/400=0.0825

8 0

2 years ago

Plz look at pic !!!! Plz Help!!! <br> Use proportion to solve

soldi70 [24.7K]

Answer:

It takes 26 2/3 gallons to make a 400 mile trip.

Step-by-step explanation:

This question is simply asking for the number of miles per gallon . In math, <em>per</em> means this is meant to be written as a fraction.

"If a trip of 270 miles required 18 gallons of gas" is actually saying "270 miles per 18 gallons." This can be written as a fraction like so: 270/18.

If we're looking for the amount of gas used for a 400 mile trip, we have the fraction: 400/g, g being the amount of gallons it took to make that trip.

Now we can set up the proportion: $\frac{270}{18} =\frac{400}{g}$

Cross multiply and solve accordingly.

$\frac{270}{18} =\frac{400}{g}$

400 $270g = 400 *18\\ 270g = 7200\\g=26\frac{2}{3}$ /g

So the answer is:

It takes 26 2/3 gallons to make a 400 mile trip.

6 0

3 years ago