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LuckyWell [14K]
3 years ago
11

how many gallons of a 80% antifreeze solution must be mixed with 70 gallons of 30% antifreeze to get a mixture that is 70% antif

reeze

Mathematics
1 answer:
Fynjy0 [20]3 years ago
3 0
Let x=gallons of 80% solution to be mixed
x+80=gallons go final 70% mixture
..
80%*x+30%*80=70%*(x+80)
.8x+24=.7x+56
.1x=32
x=320
gallons of 80% solution to be mixed=320
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Exponential and Logarithmic Functions HELP PLS
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1) c) y = 500 * 2^x 
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In year 2, this doubles to 500 * 2^2 = 500 * 4 = 2000
ans so on
This model describes the population doubling every year

2) 
A) 3 (1/2)^x and C) (0.25)^x
These numbers reduce as x increases because there is a number with an absolute value less than 1 is being raised to the power of x. They also will never totally reach zero or become negative, but will approach zero as x becomes very large. 
4 0
3 years ago
PLS HELP ME ASAP FOR 39 (SHOW WORK!) + LOTS OF POINTS!! *CORRECT ANSWER ONLY!*
Nady [450]
The straight line ON has the following equation :
(x - 18)/(x - 0) = (y - 12)/(y - 0)
Where (18,12) are coordinates of N and (0,0) are coordinates of O.
x - 18/x = y - 12/y
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y =12x/18 - - - - - (a)

The coordinates satisfy equation (a) are (7.5, 5)

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7 0
3 years ago
Read 2 more answers
A gift box in the shape of a rectangular prism measures 8 inches by 8 inches by 10 inches what is the least amount of wrapping p
Phantasy [73]
The first thing we must do for this case is to find the surface area of the rectangular prism.
 We have then:
 A = 2 * (l * h) + 2 * (h * w) + 2 * (w * l)
 Where,
 w: width
 l: long
 h: height
 Substituting values we have:
 A = 2 * (10 * 8) + 2 * (8 * 8) + 2 * (8 * 10)
 A = 448 in ^ 2
 Answer:
 
the least amount of wrapping paper needed to wrap the gift box answer is:
 
A = 448 in ^ 2
5 0
3 years ago
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What is -7.08 as a fraction in simplest form
zhenek [66]
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3 0
3 years ago
Mrs drew wants to build a square sandbox with an area of 169 square feet. What is the total length of wood mrs. Drew needs to ma
Bezzdna [24]

Area of sandbox = 169 square feet

Area of square with side 'x' is given by the formula = x^2

We have to determine the total length of wood Drew needs to make the sides of the​ sandbox.

Total length of wood required would be equal to perimeter of sandbox.

Let 'a' be the side of the square sandbox.

So, Area of sandbox = 169

a^2 = 169

a = \sqr{169}

a = 13 feet

Total length of wood required to make sides of the sandbox = Perimeter of the square sandbox = 4 \times a

= 4 \times 13

= 52 feet.

Therefore, 52 feet of wood is required to make the sides of the square sandbox.


7 0
3 years ago
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