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Sonbull [250]
3 years ago
6

What is the value of 4a - 2b when a is 7 and b is 4?

Mathematics
1 answer:
Hitman42 [59]3 years ago
3 0

Answer:

4a-2b

=4(7)+2(4)

=28+8

=36

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One angle of atriangle measures 12 degrees. the second angle's measurements is five times the third. what is the measure of the
andrezito [222]
28 degrees. This is because the first angle is 12 degrees, the third is x degrees and the second is 5x. You know that in a triangle the angles add up to 180 degrees so 12 + 5x + x = 180. Then you get 6x =168 and x =28 degrees. (**x being the thrid angle**)
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3 years ago
yesterday , Elsa had K baseball cards today she gave 12 away ,using K write an expression for the number of cards elsa has left
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Answer:

K - 12 = X

Step-by-step explanation:

Can't really, it's an expression.

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3 years ago
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A type of thermometer has temperature readings at the freezing point of water that are normally
irinina [24]

Answer: I'm pretty sure its -0.74

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2 years ago
483.6 is what percent of 180
liraira [26]

Answer:

We assume, that the number 180 is 100% - because it's the output value of the task.

2. We assume, that x is the value we are looking for.

3. If 100% equals 180, so we can write it down as 100%=180.

4. We know, that x% equals 483.6 of the output value, so we can write it down as x%=483.6.

5. Now we have two simple equations:

1) 100%=180

2) x%=483.6

where left sides of both of them have the same units, and both right sides have the same units, so we can do something like that:

100%/x%=180/483.6

6. Now we just have to solve the simple equation, and we will get the solution we are looking for.

7. Solution for 483.6 is what percent of 180

100%/x%=180/483.6

(100/x)*x=(180/483.6)*x       - we multiply both sides of the equation by x

100=0.37220843672457*x       - we divide both sides of the equation by (0.37220843672457) to get x

100/0.37220843672457=x

268.66666666667=x

x=268.66666666667

now we have:

483.6 is 268.66666666667% of 180

4 0
3 years ago
a brand of cereal had 1.2 milligrams of iron per serving. then they changed their recipe so they had had 1.8 mg of iron per serv
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To get the percent of increase, we will follow these steps:
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difference = 1.8 - 1.2 = 0.6
2- divide the difference from step one by the original number (the number before the increase) and then multiply the quotient by 100 to get the percent as follows:
% of increase = (0.6 / 1.2) * 100 = 50%

Based on the above calculations, the percent of increase in the amount of iron is 50%
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