All categories

3 years ago

Two equations are given below:

Mathematics

2 answers:

stealth61 [152]3 years ago

8 0

a is given to us so just plug a into the first equation:

b-3 - 3b =9

Add 3 to both sides:

b-3b=12

Combine like terms:

-2b=12

Divide by -2 to get b by itself:

b=-6

The only answer with b as -6 is the first one, (-9,-6)

Anit [1.1K]3 years ago

7 0

The first one, (-9,-6) because if you were to plug it in the answers would equal therefore, the equation is true.

You might be interested in

Write y=2x^2+12x+14 In vertex form

ratelena [41]

Answer:

$\large\boxed{y=2(x+3)^2-6}$

Step-by-step explanation:

The vertex form of a parabola f(x) = ax² + bx + c:

$y=a(x-h)^2+k$

(h, k) - vertex

$h=\dfrac{-b}{2a}\\\\k=f(h)$

We have the equation:

$y=2x^2+12x+14\\\\a=2,\ b=12,\ c=14\\\\h=\dfrac{-12}{2(2)}=\dfrac{-12}{4}=-3\\\\k=f(-3)=2(-3)^2+12(-3)+12=2(9)-36+12=18-36+12=-6$

Finally:

$y=2(x-(-3))^2+(-6)=2(x+3)^2-6$

7 0

3 years ago

Round to the nearest hundredth please answer I need it

ioda

Answer:

60 degrees

Step-by-step explanation:

A)60

B)30

C)90

6 0

3 years ago

What are all of the steps to get 7(3x-1)-(x+5)

Flauer [41]

Answer:

20x-12

Step-by-step explanation:

Given:

7(3x−1)−(x+5)

Step 1: Distribute the Negative Sign:

=7(3x−1)+−1(x+5)

=7(3x−1)+−1x+(−1)(5)

=7(3x−1)+−x+−5

Step 2: Distribute:

=(7)(3x)+(7)(−1)+−x+−5

=21x+−7+−x+−5

Step 3: Combine

=21x+−7+−x+−5

=(21x+−x)+(−7+−5)

=20x+−12

8 0

3 years ago

Read 2 more answers

Rewrite 81 as a square or a cube

kolbaska11 [484]

9 squared is 81
81=9^2
Or, (3^2)^2. Double square!

5 0

3 years ago

Read 2 more answers

Solve the inequality and express your answer in interval notation<br> -10 <-2x+ 6<-2

cupoosta [38]

Answer:

4<x<8 interval notation is (4,8)

Step-by-step explanation:

hope this helps

5 0

2 years ago