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Lubov Fominskaja [6]
3 years ago
5

On his fifth birthday, Pual was 42 inches tall on his seventh birthday he was 48 inches tall. ]

Mathematics
1 answer:
ASHA 777 [7]3 years ago
3 0

Answer:

On his 6th birthday, he was 45 inches tall

Step-by-step explanation:

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Erika bought 3 kilograms of cinnamon red hots and 1 kilogram of gummy bears for $21.00. Meanwhile, Irene bought 3 kilograms of c
grin007 [14]
Erika $21
3k of cinnamon
1g of gummies

Irene $39
3k of cinnamon
3k of gummies

c= cost of 1 kilogram of cinnamon
g= cost of 1 kilogram of gummies

Erika's Equation
3c + 1g= $21

Irene's Equation
3c + 3g= $39

Solve for one variable in equation one and substitute it in the other equation.

3c + 1g= 21
subtract 3c from both sides
g= 21 - 3c

Substitute g=21 - 3c in equation
3c + 3g= $39
3c + 3 (21 - 3c)= 39
multiply all in parentheses
3c + 63 - 9c= 39
63 - 6c= 39
subtract 63 from both sides
-6c= -24
c= $4

Substitute c=4 in equation to find g
3c + g= 21
3(4) + g= 21
12 + g= 21
subtract 12 from both sides
g= $9

ANSWER: The price of 1 kilogram of cinnamon red hots is $4. The cost of 1 kilogram of gummies is $9.

Hope this helps! :)
3 0
3 years ago
Ben made a four digit number with the numbers 7,4,3,9. The number was smaller than 4 and bigger than 1. The 7 cannot go in the t
victus00 [196]

3.479 is the answer


3 0
3 years ago
Among all the rectangles whose perimeters are 100 feet, find the dimensions of the one with the maximum area. explain step by st
kompoz [17]
<span>We let x be the length and y be the width of the rectangle. Then,
 
Perimeter = 2x + 2y
100 = 2x + 2y
50 = x + y
y = 50 - x
 
Area = xy
A = x(50 - x)
A = 50x - x^2
 
We then take the derivative; set it equal to zero:
 
A ' = 50 - 2x
0 = 50 - 2x
2x = 50
x = 25
y = 50 - x
y = 50 - 25
y = 25
 
Therefore, the dimensions are 25 and 25.</span>
7 0
3 years ago
What is the common factors of 20,25,40?
Marina CMI [18]
The common factors for 20 is 1,5
25 is 1,5
40 is 1,5
GCF:5
3 0
3 years ago
The original price of an audio jukebox was 280 it is on sale for 220 what percent discount does this represent
solong [7]

Answer:

The answer would be 12%

Step-by-step explanation:

250-220=30 and 30 is 12% of 250

4 0
3 years ago
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