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timurjin [86]
3 years ago
9

Does anyone know how to do simple interest for 7th grade math? I need a tutorial or an example please, thanks. A question exampl

e is $750, 7%, 3 years.
Mathematics
1 answer:
lions [1.4K]3 years ago
3 0

Answer:

750/100 X 7 = 52.50

52.50 X 3 = $157.50

Step-by-step explanation:

divide principal amount by 100 then multiply by interest percentage. this gave 52.50

now multiply the interest amount by number of years

in this case 3

52.50 X 3 = $157.50

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2 years ago
Show how to solve the problem 378×6 Using Pl. value with regrouping explain how you knew when to regroup
Fynjy0 [20]
378
x  6        
six is your base number.. then you do 6x8 which is 48 you will leave the 8 under the ones column and carry the 4 above the seven then you do 7x6 plus the 4.   

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3 years ago
Alejandro needs to buy bird seed from the local pet store for his parrots. A
Gnesinka [82]

First take note he only has $20 and the bag he must buy is $12.55. Also the loose seeds are $1.49 per pound.

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20-12.55=7.45

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7 0
3 years ago
What is the first step in solving the following system of equations?
Alex_Xolod [135]

Answer:

Solve the 1st equation for y and then you substitute the answer of the y value to the other equation to get the x value

3 0
3 years ago
A rectangle is constructed with its base on the​ x-axis and two of its vertices on the parabola y equals = 100 100 minus −x squa
masha68 [24]

Answer:

Step-by-step explanation:

Given that a rectangle is constructed with its base on the x axis and two of its vertices on the parabola

y=100-x^2

This parabola has vertex at (0,100) and symmetrical about y axis.

Any general point above x axis can be written as (a,b) (-a,b) since symmetrical about yaxis.  

Hence coordinates of any rectangle are

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Length of rectangle = 2a and width = 100-a^2

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To find max area, use derivative test.

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Thus we find dimensions of the rectangle are l =4 and w = 96

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3 years ago
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