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3 years ago

12

John had a rock that weighed 128 kg. The scale he used to weigh the rock has a percent error of 2%. Which could be measured weig

hts of the rock?

1 answer:

Genrish500 [490]3 years ago

4 0

Answer:

a

Step-by-step explanation:

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irina1246 [14]

Answer:

4/5 cups to make 1 pound of dog treats

Step-by-step explanation:

3/4 cups : 1 1/4 pounds

x cups : 1 pound

Cross multiply

3/4 * 1 = 1 1/4 * x

x = 3/4 / 1 1/4

= 3/4 / 5/4

= 3/4 * 4/5

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By finding the unit rate and multiplying it by 7

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Jamaal has 20 models of cars and planes. He has 3 times as many cars as planes. What is the ratio of cars to total models?

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X^2-x+2=0<br> Please use the quadratic formula

Ainat [17]

Answer:

$\boxed{\sf x=\cfrac{1\pm \sqrt{-7} }{2}}$

Step-by-step explanation:

$\sf x^2-x+2=0$

<u>Use quadratic formula:</u>

$\boxed{\sf \frac{-b\pm \sqrt{b^2-4ac}}{2a}}$

$\sf a=1, b=-1, c=2$

___________________________

$\sf x_1,_2=\cfrac{-\left(-1\right)\pm \sqrt{\left(-1\right)^2-4\times \:1\times \:2}}{2\times \:1}$

$\sf \sqrt{\left(-1\right)^2-4\times \:1\times \:2}$

$\sf =\sqrt{-7}$

_________________

$\sf x_1,_2\cfrac{-\left(-1\right)\pm \sqrt{-7}}{2\times \:1}$

$\sf -(-1)=1$

$2\times 1=2$

$\sf x_1,_2=\cfrac{1\pm \sqrt{-7} }{2}$

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<u>Learn more: brainly.com/question/22286698</u>

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2 years ago

In 2015, there were roughly 1x10^6 high school football players and 2x10^3 professional football players in the United States.

melisa1 [442]

Answer:

500.

Step-by-step explanation:

(1 * 10^6) / (2 * 10^3)

= 1/2 * 10^6/10^3

= 0.5 * 10^3

= 5 * 10^2

= 500.

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2 years ago