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Mrac [35]
3 years ago
7

Use the box method to distribute and simplify (-5x-2)(-2x^2+6x).

Mathematics
1 answer:
Mkey [24]3 years ago
3 0

Answer:

10x^{3} - 26x^{2} - 12x

Step-by-step explanation:

1)  Use the FOIL method: (a+b)(c+d)=ac+ad+bc+bd.

10x^{3} - 30x^{2} + 4x^{2} -12x

2)  Collect like terms.

10x^{3} + (-30x^{2} +4x^{2} )-12x

3) Simplify.

10x^{3} - 26x^{2} -12x

Therefor, the answer is, 10x^3 - 26x^2 - 12x.

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Please help......... I am pretty confused.
Furkat [3]

Answer:

2.5-5

Step-by-step explanation:

6 0
3 years ago
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The diameter of a circle is 8 feet. What is the angle measure of an arc a feet long?
fiasKO [112]

Answer:

Given: circle

diameter = 10 cm => radius (R) = 5 cm

Find: measure of angle bounding sector = 11 π sq. cm.

Plan: determine what part of the circle’s total area equals the sector’s area.

Total Area of Circle A = π R^2 = π 5^2 = 25 π sq. cm.

Therefore: Sector Area = 11 π cm^2/25 π cm^2 = 11/25

Since the sector is 11/25 th of the circles area, the sector angle will measure 11/25 th of the circle’s circumference. They are proportional.

C = 2 π R = 2 π (5) = 10 π cm

Sector Arc = measure of sector angle = 11/25 (10 π) =

22π/5 radians

Answer: Sector Arc = 22π/5 Radians

4 0
3 years ago
Simplify (3a^4-2a^2+5-10)-(2a^4+4a^2+5a-2)
katrin [286]

Answer:

Step-by-step explanation:

3a^4 -2a^2 + 5 - 10 -(2a^4 +4a^2 + 5a -2)

as given.. i'm wondering if the 5 in the first group is really 5a.. hmmm

I'm guessing that it is...  soooo distribute the minus sign

= 3a^4 - 2a^2 +5a -10  -2a^4 -4a^2 -5a +2

= a^4 -6a^2 -8   :)  voila that's your answer

7 0
3 years ago
Write out the following proportions in words. 81/9 = 45/5
sergiy2304 [10]
What do you mean by in words?
7 0
3 years ago
What is the vertex of the graph of y + 2x + 3 = –(x + 2)2 + 1? (–3, –33) (–3, 3) (3, –24) (3, 21)
Arte-miy333 [17]
ANSWER

(-3,3)

EXPLANATION

The given function is

y + 2x + 3 = - (x + 2) ^{2} + 1

Expand

y + 2x + 3 = - x ^{2} - 4x - 4 + 1

Rewrite in the form:

y =a {x}^{2} + bx + c

This implies that,

y = - x ^{2} - 4x - 2 x - 4 + 1 - 3

y = - {x}^{2} - 6x - 6

Complete the square to get,

y = - ( {x}^{2} + 6x) - 6

y = - ( {x}^{2} + 6x + {(3)}^{2} ) - - {(3)}^{2} - 6

y = - {(x + 3)}^{2} +9 - 6

y = - {(x + 3)}^{2} +3

The function is now in the form:

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

where (h,k) =(-3,3) is the vertex
8 0
4 years ago
Read 2 more answers
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