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3 years ago

Evaluate the function. f(x) = -x^2 Find f(-5)

Mathematics

1 answer:

mina [271]3 years ago

4 0

1) plug -5 in for the place of x.
2) solve -(-5)^2
3) f(-5)=25

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If 12x +1 =-7, what’s is the value of x over 8

Sergio [31]

12x+1=-7
-1 -1
12x=-6
/12 /12

x=-1/2 or x=-0.5

8 0

3 years ago

I need help urgently plz<br><br>Find x<br>

nikitadnepr [17]

Answer:

X= 70 degrees

Step-by-step explanation:

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3 years ago

Find the distance and midpoint between (- 8, 1) and (4, 6)

Natali5045456 [20]

Answer:

Distance: 13, Midpoint: (-2, 3.5)

Step-by-step explanation:

The distance formula is $\sqrt{(x2-x1)^{2} +(y2-y1)^{2} }$ . We can plug in the numbers from your question so it would be √(4+8)^2+(6-1)^2 = √144+25=169 =√169 = 13

The midpoint formula is ((x1+x2)/2, (y1+y2)/2), which is -8+4/2, 1+6/2 = (-2, 3.5).

5 0

2 years ago

PLEASE HELP ASAPPPP!!!!!!!!

Lisa [10]

Answer:

slope: 1.25

Part B: The order in which the points are given does not change the value of the slope

Step-by-step explanation:

Part A. Given two points we can find slope using the slope formula

$m = \frac{y_2-y_1}{x_2-x_1}$

Given the points ( -6, 1/2) and ( -4,3 )

We plug in the y values and x values (starting with the last point give )

$m=\frac{3-.5}{-4-(-6)} \\3-\frac{1}{2} =2.5\\-4-(-6)=2\\\frac{2.5}{2} =1.25\\$

so we can conclude that the slope of a line that passes through the points ( -6, 1/2) and ( -4,3 ) is 1.25

Part B. The order in which the points are given does not change the value of the slope

Observe -

* flip the order in which the points are given *

given (-4,3) and (-6,1/2)

we use the same formula

*plug in the y and x values starting with the last point*

$m=\frac{.5-3}{-6-(-4)} \\.5 - 3=-2.5\\-6-(-4)=-2\\\frac{-2.5}{-2} =1.25$

The slope still equals 1.25 meaning that the order in which the points are given does not matter.

5 0

2 years ago

William has a 26-liter glass tank. First, he wants to put some marbles in it, all of the same volume. Then, he wants to fill the

VMariaS [17]

You might think that the volume of a circle is needed to solve this problem but you can do it in a more simplified manner. First figure out how much water 85 marbles displace.

26-20.9=5.1 liters of water

Now, let us see how much water 200 marbles displace.

85 marble x (200/85) = 5.1 liters x (200/85)

200 marbles = 12 liters

We can find the amount of water needed to fill the tank now.

26-12=14 liters of water

answer: 14 liters of water

5 0

3 years ago