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docker41 [41]
2 years ago
13

Solve the system by substitution.

Mathematics
2 answers:
mezya [45]2 years ago
8 0

Answer:

(2, 6)

Step-by-step explanation:

if you meant for both of the y to be the same then this should be right

Roman55 [17]2 years ago
8 0

Answer:

(2,6)

Step-by-step explanation:

*this is actually elimination*

1st- Turn both of them into standard form.

y=9x-12 ---> 9x-y=12

y=3x -->  3x-y=0

--

Multiply 9x-y=12 by -1

-9x+y=-12

3x-y=0

-6x=-12

divide by 6

x=2

--

Plug 2 into the first equation

9(2)-y=12

18-y=12

Cancel out 18 by subtracting -18 to both sides

-y=-6

divide by -1

y= 6

Answer: (2,6)

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Factor the following polynomial.<br> 98x3 – 18x
grigory [225]

Answer:

2x(7x - 3)(7x +3)

Step-by-step explanation:

Find common factors between the 2 numbers:

98x^3 - 18x

2x(49x^2 - 9)

now find what numbers multiplied together is 49, and find what numbers added together equals 0 and the product is 3, 7 times 7 is 49 and 3(-3) = 9 while 3 - 3 = 0 so:

2x(7x - 3)(7x +3)

3 0
2 years ago
Read 2 more answers
Answer to 0.08x+(x-200)
kari74 [83]
0.08x+(x-200)
(0.08x)(x+-200)
(0.08x)(x)(0.08x)(-200)
= 0.08x^2-16x
3 0
3 years ago
Are these answers right? Questions are below!
Ipatiy [6.2K]

Answer:

8 yes

10 yes

11 yes

12 yes

13 yes

7 0
3 years ago
Read 2 more answers
20 POINTS)
olga_2 [115]

Answer:

D) 1,2

Step-by-step explanation:

Zeroes of a function are the x-values where y= 0

5 0
3 years ago
Marvin used the money he received from
Kay [80]

Answer:

<em>Correct choice: C. $320</em>

Step-by-step explanation:

<u>Simple Interest</u>

Definition: Interest calculated on the original principal only of a loan or on the balance of an account.

Unlike compound interest where the interest earned in the compounding periods is added to the new principal, simple interest only considers the principal to calculate the interest.

The interest earned is calculated as follows:

I=P.r.t

Where:

I = Interest

P = initial principal balance

r = interest rate

t = time

Marving is saving money in a savings account with a simple interest rate of r=7.5%=0.075. It's known that after t=12 years, the account had earned $288 interest. Substituting in the formula:

288 = P*0.075*12

Calculating:

288 = 0.9P

Dividing by 0.9:

P = $320

Correct choice: C. $320

7 0
3 years ago
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