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3 years ago

Help worth 50 points!

Mathematics

1 answer:

Darina [25.2K]3 years ago

8 0

Answer:

x>-2

Step-by-step explanation:

-9x-15<3

+15<+15 add 15 to both sides

_________

-9x<18

÷-9 <÷-9 divide both sides by -9, switch inequality _________ symbol when dividing by negative number.

x>-2 Answer

_________

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The expression x-2 has a value of -5 for some value of x. For the same value of x, what is the value of the expression (x-2)² +

ankoles [38]

X - 2 = -5
x = -5 + 2
x = -3

(x-2)^2 + 5x - 10...when x = -3
(-3-2)^2 + 5(-3) - 10
-5^2 - 15 - 10
25 - 15 - 10
10 - 10
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5 0

3 years ago

F(x)=2x-1 and g(x)=6x-2. Write a formula for (fg)(x)

Alina [70]

Answer:
2(6x-2)-1

Explanation:
Plug in g(x) for x

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3 years ago

Mr Prothero places £3003 into a

mamaluj [8]

Answer:

£3,543.54

Step-by-step explanation:

Amount after 2 years = Principal + interest

Get the interest

Interest = PRT/100

Interest = 3003 * 9 * 2/100

Interest = 3003 * 18/100

Interest = 30.03 * 18

Interest = 540.54

Amount after 2 years = 3003 + 540.54

Amount after 2 years = £3,543.54

6 0

3 years ago

A pyramid with a rectangular base is stacked on top of rectangular prism. The height of the composite figure is 12 inches. The l

Arte-miy333 [17]

Answer:

Step-by-step explanation:

140 cubic inches

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4 years ago

Read 2 more answers

The equation below expresses the approximate

natka813 [3]

Answer:

The ball will be the 7 ft high at 2 different times.

Step-by-step explanation:

The height in meters of the ball is given by the following equation:

$h(t) = -16t^2 + 25t$

7 feet high

The height, by the equation, is given in meters, so we have to work in meters. Since each feet has 0,3048 meters, 7 feet have have 2.1336 meters. So, we have to solve the following equation

$2,1336 = -16t^2 + 25t$

$16t^2 - 25t + 2,1336 = 0$

At how many different times will the ball be 7 ft. High?

We have to find the number of solutions for the equation above.

It is given according to the value of $\Delta = b^2 - 4ac$ . If it is positive, there are two solutions, zero one solution and negative no solutions.

In this equation $a = 16, b = -25, c = 2.1336$ . So

$\Delta = b^2 - 4ac = (-25)^2 - 4*16*2.1336 = 488$

Since the coefficient is positive, the ball will be the 7 ft high at 2 different times.

3 0

3 years ago