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3 years ago

11

In 20 minutes a heart can beat 700 times. At this rate in how many minutes will a heart beat 140 times at what rate can a heart

beat

1 answer:

murzikaleks [220]3 years ago

5 0

4900 is the answer :)

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Ann worked 14 hours and earned a total of $108.50.<br> How much did she earn per hour?

Delicious77 [7]

Answer:

108.50 divided by 14= 7.75

Step-by-step explanation:

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3 years ago

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An engineer measures the peak current (in microamps) when a solution containing an amount of nickel (in parts per 106 ) is added

dangina [55]

Answer:

B. decrease the intercept, increase the slope

Step-by-step explanation:

A slope indicates the steepness of a line while the intercept points the location where it intercepts its axis. The linear relationship between can be defined using the intercept and the slope. Both concepts are used to estimate the average range of change. Since we are trying to add a peak current value of 0.38 which is lesser than the average, the intercept of the graph would therefore decrease and the slope increase.

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3 years ago

Find the center and radius of x^2+y^2=9

riadik2000 [5.3K]

$x^2+y^2=9\Leftrightarrow (x-0)^2+(y-0)^2=3^2$ hence the center is (0,0) and the radius is 3

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3 years ago

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4x-5y+2z=-3<br> 6x+4y+9z=8<br> 11x-2y-z=7

Nutka1998 [239]

Answer:

thank you i need that

Step-by-step explanation:

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4 years ago

Aleonysh [2.5K]

Answer:

AB // CD and AD // BC, then ABCD is a parallelogram

Step-by-step explanation:

Step 2: Show AD // BC

A = (-3 , 3) and D = (0 , 0)

Find the slope of AD

$m_{AD}=\frac{0-3}{0--3}=\frac{-3}{3}=-1$

B = (2 , 5) and C = (5 , 2)

$m_{BC}=\frac{2-5}{5-2}=\frac{-3}{3}=-1$

The slope of AD = the slope of BC

So AD // BC because they have the same slope

Step 3:

Each two opposite sides are parallel in quadrilateral ABCD

So the quadrilateral is a parallelogram

8 0

3 years ago