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3 years ago

Which expression is equivalent to 16a -18b + 20a

1 answer:

3 0

B) (16 + 20)a - 18b

16a and 20a are both positive and 18b is the only negative it’s easier to add the positive with each other then the negative and a positive then add other positive

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A line has slope -3/4and passes through the point (8, 3). Write an equation of the line.

Phoenix [80]

Answer:

y=-3/4x + 0.25

Step-by-step explanation:

7 0

3 years ago

Find the area of the figure above. use 3.14 for π. do not round your answer

professor190 [17]

Answer:

Step-by-step explanation:

Alright, lets get started.

This is the combination of three figures semi circle, rectangle and triangle.

We will find the area of each figure and will add them.

The radius of the circle is half of the diameter, so radius is 6.

Area of semi circle will be : $\frac{1}{2} \times 3.14 \times 6^2$

Area of semi circle is : 56.52

Area of rectangle is: $length \times width$

So, area of rectangle is: $40\times 12=480$

Area of triangle is : $\frac{1}{2}\times base\times height$

So, area of triangle is : $\frac{1}{2} \times 12\times 5=30$

Adding all these three areas, the area of above figure will be:

[tex]Area = 56.52+480+30

Hence Area is 566.52............... Answer

6 0

3 years ago

F(x)=-2x+15 from x=0 to x=3 Find the average rates of change

Scrat [10]

Answer:

see below

Step-by-step explanation:

6 0

3 years ago

How much more is 8x + 7 than 2x - 3?

Anna007 [38]

(8x + 7) - (2x - 3)
(8x + 7) + (-2x + 3)
combine like terms
8x - 2x and 7 + 3

6x + 10

3 0

3 years ago

Use quadratic regression to find the equation for the parabola going through these three points (-7,134)(-3, 10)(5,50)

Artyom0805 [142]

Answer:

Step-by-step explanation:

y = ax² + bx + c

a( - 7)² + b( - 7) + c = 134 ⇔ 49a - 7b + c = 134 ......... (1)

a( - 3)² + b( - 3) + c = 10 ⇔ 9a - 3b + c = 10 ......... (2)

a(5)² + b(5) + c = 50 ⇔ 25a + 5b + c = 50 ......... (3)

(1) - (2)

40a - 4b = 124 ⇔ 10a - b = 31 ........... (4)

(3) - (2)

16a + 8b = 40 ⇔ 2a + b = 5 ........... (5)

(4) + (5)

12a = 36 ⇒ a = 3

2(3) + b = 5 ⇒ b = - 1

9(3) - 3( - 1) + c = 10 ⇒ c = - 20

y = 3x² - x - 20

y = [ 3 ] x² + [ - 1 ] x + [ - 20 ]

8 0

3 years ago