2 years ago

Combine and simplify the second set of terms 3a-7a^2-3a

Mathematics

1 answer:

tekilochka [14]2 years ago

7 0

-7a^2 because 3a-3a=0, the second set of terms can be simplified as -7a^2

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I need help with my algebra 2. I also want to know how to solve this.

Lisa [10]

Add 1 to both sides:

$\sqrt{x+3} = x+1$

In cases like this, we have to remember that a root is always positive, so we can square both sides only assuming that

$x+1 \geq 0 \iff x \geq -1$

Under this assumption, we square both sides and we have

$x+3 = (x+1)^2 \iff x+3 = x^2+2x+1 \iff x^2+x-2 = 0$

The solutions to this equation are

$x = -2,\ x=1$

But since we can only accept solutions greater than -1, we discard $x=-2$ and accept $x=1$ .

In fact, we have

$x=-2 \implies \sqrt{-2+3}-1=0\neq -2$

and

$x=1 \implies \sqrt{4}-1=1$

which is the only solution.

4 0

3 years ago

I need help can you help me please

ozzi

Just multiple them together and u get 693

6 0

3 years ago

Mel had some cartons of milk. He sold 2/5 of the cartons in the morning. He then sold 3/4 of the remainder in the afternoon. 24

Yuki888 [10]

Sold 2/5 in the morning.....leaving 3/5
he sold 3/4 of 3/5 in the afternoon......3/4 * 3/5 = 9/20

2/5 = 8/20
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so if 1/20 = 24, then 20/20 = 24*20 = 480

so he started with 480 cartons

4 0

2 years ago

X =x=x, equals <br> ^\circ <br> ∘

kolbaska11 [484]

Answer:

here,

X + 125+35 =180

X=20

Hence the value of X is 20 degree

I think it will help you

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1 year ago

a school had 690 students sign up for the trivia teams if they wanted to have nine teams with the same number of students on eac

Anna11 [10]

Answer:

30 more students

Step-by-step explanation:

690 + 30 = 720

720 / 9 = 80

8 0

3 years ago