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lawyer [7]
3 years ago
9

Evaluate the expression when a=-6. a^2 + 5a - 5

Mathematics
2 answers:
JulijaS [17]3 years ago
6 0

Answer:

61

Step-by-step explanation:

(6)^2+5(6)-5

=36+30-5

=61

makvit [3.9K]3 years ago
6 0

Answer:

1

Step-by-step explanation:

( - 6) {}^{2}  + 5 \times  - 6 - 5 \\ 36 - 30 - 5 \\ 36 - 35 \\  = 1

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Find the area of the shaded regions. Give your answer as a completely simplified exact value in terms of π (no approximations).
olga_2 [115]

Answer:

7\pi cm^2

Step-by-step explanation:

The area of a circle is given by A=\pi r^2

For circle B, the radius is 3 cm, it has an area of \pi *3^2=9\pi cm^2

Circle D also has a radius of 1 cm. Its area is \pi *1^2=\pi cm^2

Circle P also has a radius of 1 cm and area \pi*1^2=\pi cm^2

The area of the shaded region is then 9\pi -\pi-\pi=7\pi cm^2

5 0
3 years ago
bought a new car in 2011 for 25000. in 2015, joe was offered a fair price of 12000 for his car but he turned it down. build a li
Mrrafil [7]

Answer:

y=-3,250t+25,000

Step-by-step explanation:

we know that

The linear equation in slope intercept form is equal to

y=mx+b

where

m is the slope of unit rate of the linear equation

b is the y-intercept or initial value of the linear equation

Let

t ----> the number of years since 2011

y --->the car's value

In this problem the year 2011 represent t=0

so

the year 2015, represent t=4 years (2015-2011)

we have the ordered pairs

(0,25,000) ----> represent the y-intercept

(4,12,000)

<em>Find the slope m</em>

The formula to calculate the slope between two points is equal to

m=\frac{y2-y1}{t2-t1}

substitute the values

m=\frac{12,000-25,000}{4-0}

m=\frac{-13,000}{4}

m=-\$3,250\ per\ year ---> is negative because is a decreasing function

we have

b=\$25,000 ----> value of y when the value of x is equal to zero (initial value)

substitute the given values

y=-3,250t+25,000

3 0
3 years ago
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Brainliest if it its right
Anika [276]

Answer:

A = <u>40</u> mm^{2}

Step-by-step explanation:

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In this equation, a=4, b=6, h=8.

A = \frac{4 + 6}{2}8.

4+6=10
10/2=5
5x8=40

Hope this helps!

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2 years ago
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The volume of a rectangular pyramid is 3 cubic inches. What is the volume of a rectangular prism with the same length, width, an
kap26 [50]

Answer:

Volume is the amount of 3-dimensional space an object occupies. Volume is measured in cubic units.

Step-by-step explanation:

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3 years ago
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