MATHEMATICS HIGH SCHOOL

Simplify –2x3y × xy 2. A. –12x4y3

B. –2x3y4

C. –2x4y3

D. –3x4y3

Answers

Answer 1

Answer:

$-2x^3y\cdot xy^2=-2x^(3+1)y^(1+2)=-2x^4y^3$

Used:

$a^n\cdot a^m=a^(n+m)$

Answer: C. –2x^4y^3

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What is the value of 5c + 2, if c = 6

Answers

Answer:

Step-by-step explanation:

5c + 2, if c = 6

5(6) + 2

30 + 2

= 32

System Of Equations Elimination Method1. -3x+10y=11, -8x+2y=-20
2. 4x+16y=-19, -8x+2y=10
3. 2x+6y=-2, -x+2y=6
4. -8x-y=-13, 5x-3y=-10
5. -4x+6y=4, -x+8y=1
6. -x+y=-5, 7x-3y=23
7. -9x-5y=26, 4x-4y=-24

Answers

1. x = 3, y = 2
2. x = -99/68, y = -14/17
3. x = -4, y = 1
4. x = 1, y = 5
5. x = -1, y = 0
6. x = 2, y = -3
7. x = 14, y = 20

I attached the pictures with the work.

Solve the system of equations 3y+2z=12 and y-z=9

Answers

mulitply second equation by 2 and add to first

3y+2z=12
2y-2z=18 +
5y+0z=30

5y=30
divide 5
y=6

sub back
y-z=9
6-z=9
minus 6
-z=3
times -1
z=--3

x=-3
y=6

1. What is the coefficient of x in the division (18x^3 + 12x^2 – 3x) / 6x^2?A) 3
B) 2
C) -0.5
D) -3

Answers

well since we're dealing with the co-efficient of x, then we just have to talk about 18x^3 and divide it by 6x^2 and we get 3x. so the co-eff. is 3 so (A)

Subtract. -21 - (-13)

Answers

Answer:

-8

Step-by-step explanation:

-21-(-13)

=-21+13

=-8 is the answer......

Answer:

$-8$

Step-by-step explanation:

$-21 - (-13)$ is the same as $-21+13$ , so the answer is $-8$ .

A "point" is 1% of your borrowed amount on a mortgage. You want to pay 2 points to get a 0.5% reduction in your interest rate on a $175,000 mortgage. How much will you pay in points?

Answers

a point is 1% of your borrowed amount on a mortgage.
mortgage loan = 175,000

175,000 x 1% = 1,750 per point

1750 x 2 = 3,500 is the amount paid for the 2 points.

Answer: a) $3,500

Step-by-step explanation:

I got it right

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