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elixir [45]
3 years ago
12

(13x2+9x-4)-(12x2-2x+6) add or subtract the polynomials

Mathematics
1 answer:
bearhunter [10]3 years ago
6 0

Answer:

x^{2} +11x-10

Step-by-step explanation:

(13x^{2} +9x-4)-(12x^{2} -2x+6)

Remove the brackets and multiply the minus sign through all the numbers in the second polynomial

13x^{2} +9x-4-12x^{2} +2x-6

Rearrange in the highest order

13x^{2} -12x^{2} +9x+2x-4-6

Simplify

x^{2} +11x-10

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Solve the following system of equations.
murzikaleks [220]

Answer:

1. x=0 y=-20

2. x=0 y=7.5

Step-by-step explanation:

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3 years ago
While on vacation in Weston, Roscoe went out for a dinner that cost $90. If sales tax in Weston is 10% and Roscoe left a 20% tip
Vera_Pavlovna [14]

Answer: $107

Step-by-step explanation:

Tip = 20 % of $90

= 20/100 × $90

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I hope this helps you

7 0
3 years ago
What are the four points of intersection between 4x^2 + y^2 - 4y - 32 = 0 and x^2 - y - 7 = 0 ? Solve algebraically
tensa zangetsu [6.8K]
Remember (a²-b²)=(a-b)(a+b)

solve for  a single variable
solve for y in 2nd

add y to both sides
x²-7=y
sub (x²-7) for y in other equaiton

4x²+(x²-7)²-4(x²-7)-32=0
expand
4x²+x⁴-14x²+49-4x²+28-32=0
x⁴-14x²+45=0
factor
(x²-9)(x²-5)=0
(x-3)(x+3)(x-√5)(x+√5)=0
set each to zero

x-3=0
x=3

x+3=0
x=-3

x-√5=0
x=√5

x+√5=0
x=-√5


sub back to find y

(x²-7)=y

for x=3
9-7=2
(3,2)

for x=-3
9-7=2
(-3,2)

for √5
5-7=-2
(√5,-2)

for -√5
5-7=-2
(-√5,-2)


the intersection points are

(3,2)
(-3,2)
(√5,-2)
(-√5,-2)
8 0
4 years ago
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lana [24]

Answer:

1/3 and false at least i think wait for other answer to make sure it is correct

Step-by-step explanation:

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3 years ago
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