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Alik [6]
3 years ago
10

What is the value of 3x^2-5x+2 when x=-4? a. -66 b. -26 c. 30 d. 70

Mathematics
1 answer:
Alja [10]3 years ago
7 0

Answer:

d. 70

Step-by-step explanation:

Substituting the value of x=-4, in the given quadratic expression,

3* (-4)^2 - 5*(-4) + 2

= 3*16 - (-20) + 2

= 48 + 20 + 2

= 70

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What is the area of the trapezoid? Leave the answer in simplest radical form. The figure is not drawn to scale.
inn [45]

Answer:

  • 72 ft²

Step-by-step explanation:

The bottom side length of the triangle is the difference between the top base length and the bottom base length:

  13 ft - 5 ft = 8 ft

The vertical side length of the triangle is the same, because the triangle is an isosceles right triangle.

Since we know the base lengths and height of the trapezoid, we can use the usual formula for the area:

  A = (1/2)(b1 +b2)h

  = (1/2)(5 ft + 13 ft)(8 ft) = 72 ft²

6 0
3 years ago
Find the area! Please help me
Alexxx [7]

Answer:

Blue Box / First answer choice

Step-by-step explanation:

Plug in d1:8.6 and d2:10.2 into d1 x d2/2 to find the area.

d1 x d2/2

8.6 x 10.2/2

87.72/2

Area=43.86

6 0
3 years ago
Whats the answer to this?
marysya [2.9K]

Answer:

(x+2)(x+3)

Step-by-step explanation:

Use the sum-product pattern

x^2+5x+6

x^2+3x+2x+6

Common factor from the two pairs

x^2+3x+2x+6

x(x+3)+2(x+3)

Rewrite in factored form

x(x+3)+2(x+3)

(x+2)(x+3)

4 0
3 years ago
Write an equivalent expression to 16x + 20 using factoring.
erica [24]

Answer:

4(4x + 5)

Step-by-step explanation:

4 goes into both 16 and 20.

4×4 is 16 and

4×5 is 20.

When factoring you put the nunber you factored out typically, in front. Then the remaining factor goes in a set of parenthesis.

This is like undoing distributive property.

16x + 20

= 4(4x+5)

3 0
3 years ago
What is the equation of the line that is perpendicular to Y= -2/3X+4 and that passes through (-2,-2)?
ratelena [41]

Answer:

y = \frac{3}{2}x + 1

Step-by-step explanation:

-2 = 1½[-2] + b

-3

1 = b

y = 1½x + 1

** 1½ = 3⁄2

Perpendicular Lines have OPPOSITE MULTIPLICATIVE INVERSE <em>RATE</em><em> </em><em>OF</em><em> </em><em>CHANGES</em><em> </em>[<em>SLOPES</em>]:

-⅔ → 1½

I am joyous to assist you anytime.

3 0
3 years ago
Read 2 more answers
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