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3 years ago

How to solve it with walk through steps

Mathematics

1 answer:

mario62 [17]3 years ago

6 0

You can say

x+y=5
x=5-y

You know the value of x, put it into the next equation.

3(5-y)-7y=19
15-3y-7y=19
15-19 = 10y
-4=10y
-4/10=y
-2/5=y

Put y value back into either equation to find value of x.

x+y=5
x-2/5=5
x=5+2/5
x=27/5

Therefore, x,y = (27/5, -2/5)

Hope I helped :)

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2 years ago

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Assoli18 [71]

Slant height=l=3ft
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$\\ \sf\longmapsto TSA_{(Old\:Cone)}=\dfrac{44}{7}(5)$

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$\\ \sf\longmapsto TSA_{(Old\:Cone)}=31.4ft^2$

Now

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$\\ \sf\longmapsto TSA_{(New\:Cone)}=\dfrac{88}{7}(10)$

$\\ \sf\longmapsto TSA_{(New\:Cone)}=\dfrac{880}{7}$

$\\ \sf\longmapsto TSA_{(New\:Cone)}=125.7cm^2$

$\\ \sf\longmapsto \dfrac{TSA_{(New\:Cone)}}{TSA_{(Old\:Cone)}}=\dfrac{125.7}{31.4}$

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3 years ago

Extra points to the person who answer first

vlada-n [284]

In order to know what is the reasonable amount of tile for Mandana to order, you have to divide the choices with the area of the floor and deduct with 1 and multiply by 100. You have to assess if the answer you will get will fall between 15% and 20% which is the goal of Mandana.

a. 131/116.9 = (1.1206 – 1) x 100 = 12.06%, this does not fall between 15% and 20%

b. 138/116.9 = (1.1805 – 1) x 100 = 18.05%, this fall between 15% and 20%

c. 133/116.9 = (1.1377 – 1) x 100 = 13.77%, this does not fall between 15% and 20%

d. 141/116.9 = (1.2062 – 1) x 100 = 20.62%, this does not fall between 15% and 20%

Therefore, the reasonable amount of tile for Madana to order that is between 15% and 20% extra of the materials is 138 square feet.

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3 years ago

An investment in a savings account grows to three times the initial value after t years. If the rate of interest is 5%, compound

RideAnS [48]

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2 years ago

Someone please help and also show work plz

BARSIC [14]

Answer:

X= -50

Step-by-step explanation:

Subtract 7 from both sides then multiply by 5.

X/5 =-10

5 x -10 = -50

So x= -50

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2 years ago