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kicyunya [14]
3 years ago
7

X/2-18=(-28)= nbhbds

Mathematics
1 answer:
kogti [31]3 years ago
7 0

x=-20

-20/2= -10

-10+-18

=28

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Deena drove 585 miles in nine hours Kristen drove 605 miles in 11 hours who drove at A faster rate
Tasya [4]
Deena drove faster because 585/9 equals 65 and 605/11 equals 55
4 0
4 years ago
A blender runs at 120 volts at 4.16 amps. Calculate power
andrey2020 [161]

Answer:

P = 499.2 Watt

Step-by-step explanation:

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6 0
3 years ago
Becca and Kimberly are running at a constant speed in a marathon. Becca runs at 4.5 miles per hour. Kimberly’s progress is shown
Georgia [21]

Answer:

Part A: Kimberly

Part B:

Becca = 22.5 miles, Kimberly = 25 miles

Step-by-step explanation:

Part A:

Given that Becca runs at a constant speed of 4.5 miles per hour, use the table to find the constant speed that Kimberly runs, and compare who runs faster.

Let x = time

y = distance

k = speed = y/x

Equation for each person can be written as: y = kx

Therefore:

✔️Equation for Becca if k = 4.5

y = 4.5x

✔️Find k (speed) of Kimberly using (2, 10):

Speed (k) = y/x

k = 10/2

k = 5 miles per hour

Equation for Kimberly would be:

y = 5x

Comparing their speed, Kimberly runs faster because she covers more miles per hour than Becca does.

Part B:

For Becca, substitute x = 5 into Becca's equation, y = 4.5x

Thus:

y = 4.5*5 = 22.5 miles

For Kimberly, substitute x = 5 into Kimberly's equation, y = 5x

Thus:

y = 5*5 = 25 miles

5 0
3 years ago
A circle is increased to have a circumference that is 4 times larger than the original. Which of the following options best desc
kogti [31]
Area of a circle is directly proportional to the square of radius of the circle while the circumference is proportional to the radius of the circle. This means that if the radius of a circle is increased x times, then its area will be increased to x^2 times the original area, and the circumference will increase to x times the original circumference.

Thus when the radius is doubled, or in other words if radius mad 2 time the original radius, the area of circle will become 2^2 = 4 time the original area. The circumference will become 2 times the original circumference.

We can calculate exact area and circumference of a circle from its radius using the following equations:

Area of circle = (pi/4)*r^2

Circumference of circle = 2*pi*r

Where r is the radius of the circle.

I know this is a lot, sorry.
3 0
3 years ago
X^2+9x+20=0<br><br> What are the steps to solve by factoring?
Dimas [21]
First simplify the equation and next multiply the 20 with the x^2 and find a number that adds together to give you the middle
6 0
4 years ago
Read 2 more answers
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