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Alecsey [184]
3 years ago
13

Another oneeeeeeeeeeeeeeeeee

Mathematics
2 answers:
Inessa05 [86]3 years ago
6 0

Answer:

c

Step-by-step explanation:

pick me as the brainlist

aalyn [17]3 years ago
6 0

Answer:

B. The student multiplied 380 by \frac{19}{20}.

Step-by-step explanation:

In the equation -\frac{3}{4}y - \frac{1}{5}y = 380, we can further evaluate the equation into:

-\frac{19}{20}y = 380

To find y, we need to multiply 380 by the inverse of the fraction on the other side, which is -\frac{20}{19}. However, the students multiplied 380 by \frac{19}{20} to get 361. Thus, this was the mistake.

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A family member had some five-dollar bills and one-dollar bills in her wallet. Altogether she has 18 bills and s total of $62. W
Elden [556K]
X+y=18
5x+y=62

x is number of five dollar bills and y is one dollar bills. 
3 0
2 years ago
The electrical charge on a metal plate is given
Katarina [22]

Answer:

after 10 seconds  the charge  is 1.624

Step-by-step explanation:

I think your question missed key information, allow me to add in and hope it will fit the orginal one.

The electrical charge on a metal plate is given  by the function below, where t is the time in  seconds. What is the charge after 10 seconds?

C (t) = 12e^{\frac{-t}{5} }

My answer:

Given the information:

C (t) = 12e^{\frac{-t}{5} }  

when t =10 we have:

C (10) = 12e^{\frac{-10}{5} }

<=>  C (10) = 12e^{-2}

<=>  C (10) = 12\frac{1}{e^{2} }

<=> C (10) = 12 * 0.1353

<=>  C (10) = 1.624

Hence, after 10 seconds  the charge  is 1.624

8 0
2 years ago
Consider the following pair of points.
dedylja [7]

Answer:

The answer is

<h2>\sqrt{265}  \:  \: or \:  \:  16.28 \:  \:  \:  \: units</h2>

Step-by-step explanation:

The distance between two points can be found by using the formula

<h3>d =  \sqrt{ ({x1 - x2})^{2} +  ({y1 - y2})^{2}  }  \\</h3>

where

(x1 , y1) and (x2 , y2) are the points

From the question the points are

(9,-8) and (-7,-5)

The distance between them is

d =  \sqrt{ ({9 + 7})^{2}  +  ({ - 8 + 5})^{2} }  \\  =  \sqrt{ {16}^{2} + ( { - 3})^{2}  }  \\  =  \sqrt{256 + 9}  \:  \:  \:  \:  \:  \:  \:  \:  \:  \\  =  \sqrt{265} \:  \:  \:  \:  \:  \:    \\  = 16.27882

We have the final answer as

\sqrt{265}  \:  \: or \:  \:  16.28 \:  \:  \:  \: units

Hope this helps you

4 0
3 years ago
Which expression is equivalent to (10 + 7 r - r ^ 2) + (-6 r ^ 2 - 18 + 5 r)
garik1379 [7]

Answer:

-7r^2+12r-8

Step-by-step explanation:

7 0
3 years ago
-4x+3x+2x+x=17<br> x-4x+3x+2x=13<br> 2x+x-4x+3x=9<br> 3x+2x+x-4x=1
ella [17]

Answer:

x= 8,5

x=0

X= 2

x= -2

Step-by-step explanation:

3 0
2 years ago
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