3 years ago

Solve by quadratic formula

1 answer:

8 0

The quadratic formula is:

a = leading coefficient (highest power term)
b = term with just an x to the first power.
c = constant.

Plug in and solve! :)

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X + 6x + 8 = 0 b. x2 - 6x + 9 = 0 Points for writing the equations in perfect square form. Points for explaining the solutions.

oksian1 [2.3K]

The answers are x=−2 and x=−4 .

7 0

2 years ago

Which expressions, written to the right of the equals sign, would complete this equation so that it has one solution? 4(2x – 3)

Sav [38]

The expression <span>4(2x – 3) – 4x is equal to 4·2x-4·3-4x=8x-12-4x=(8x-4x)-12=4x-12.
</span>
1. 4x-12=4x-12, then 0=0. This equation has infinite amount of solutions;
2. 4x-12=3x-4,4x-3x=-4+12,x=8. This equation has one solution.
3. 4x-12=3(2x-6),4x-12=6x-18,4x-6x=-18+12,-2x=-6,x=3. This equation also has one solution.
4. 4x-12=4(x-5),4x-12=4x-20,4x-4x=-20+12,0=-8 is not right equality, then this equation hasn't solutions.
Answer: Correct choices are B and C.
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8 0

3 years ago

The population of a town is increasing by 2% each year. If the population today is 40,000, what

UkoKoshka [18]

Answer:

46,400

Step-by-step explanation:

present population =40,000

2% of 40,000 =800

for each year it increases by 800

in 8 years time =(8*800) +40,000

=46,400

5 0

3 years ago

Hamburgers cost $2 and hotdogs cost $2. The total cost of buying b hamburgers and d hotdoge can be expressed by C=3b+2d. how can

sveticcg [70]

C= 3b + 2d
Subtract 3b first.

C-3b = 2d
Divide by 2.

C-3b/2 = d

OR

C-3b
-------- = d Your final answer!
2

3 0

3 years ago

jennie spent 1/3 of her allowance on a new book and 2/5 of her allowance on some pencil s. How much of her allowance did she spe

JulsSmile [24]

Answer:

She spent 2 1/5 of her allowance

Step-by-step explanation:

SOOOO, 3 and 5 multiplied make 15.. Right?

So, what is 1/3 of 15? it's 5

So, what is 2/5 of 15? It's 6

so 5+6=11

11/15

and reduce

so 2 1/5

I hope this helps

8 0

3 years ago