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3 years ago

252-23 Think about counting back by 25s.

Mathematics

1 answer:

vampirchik [111]3 years ago

7 0

Answer:

252-23=229

Step-by-step explanation:

is the answer

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Eli wants to combine 0.5 gallon of a 10% acid solution with some 35% acid solution to make a 15% acid solution. Which equation c

Alex17521 [72]

Answer:

Equation is $0.5 \text{ gal }\times(0.1)+ x\text{ gal }\times (0.35)=(0.5 + x)\times (0.15)$

0.125 gallons of the 35% acid solution Eli should add.

Step-by-step explanation:

Given : Eli wants to combine 0.5 gallon of a 10% acid solution with some 35% acid solution to make a 15% acid solution.

To find : Equation can you use to determine how many gallons of the 35% acid solution Eli should add?

Solution :

Let x be the gallons of the 35% acid solution.

According to question,

For 0.5 gallon of a 10% acid solution = $0.5\times 0.1$

For x gallon of a 35% acid solution = $x\times 0.35$

For (0.5+x) gallon of a 15% acid solution = $0.5+x\times 0.15$

The equation form is

$0.5 \text{ gal }\times(0.1)+ x \text{ gal }\times(0.35)= (0.5+x)\times (0.15)$

Solving the above equation,

$0.05+0.35x = 0.075 + 0.15x$

$0.2x = 0.025$

$x =\frac{0.025}{0.2}$

$x=0.125$

Therefore, 0.125 gallons of the 35% acid solution Eli should add.

The equation is $0.5 \text{ gal }\times(0.1) + x \text{ gal }\times(0.35) =(0.5 + x)\times (0.15)$

3 0

3 years ago

Read 2 more answers

Which value of b in an exponential function will result in the percent rate of change given? 23% decrease b = 8% increase b = 15

prisoha [69]

Answer:

Given an exponential function of the form

y = a*(b)^x

The values of b that will result in the desired percentage values are:

Case 1

b = 23% decrease

1 - 0.23 = 0.77

y = a*(0.77)^x

Case 2

b = 8% increase

1 + 0.08 = 1.08

y = a*(1.08)^x

Case 3

b = 15% decrease

1 - 0.15= 0.85

y = a*(0.85)^x

Case 4

b = 120% increase

1 + 1.2 = 2.2

y = a*(2.2)^x

See attached picture for examples

6 0

3 years ago

Goran deposits $4000 into an account that pays simple interest rate at %3 per year. How much interest will he be paid in the fir

adell [148]

1200 I think estimated

6 0

3 years ago

What is the y value when x equals -13 y=-160-9(x)

blsea [12.9K]

Ok so...
y=-160-9(-13)
y=-160-117
y=43
hope i helped

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3 years ago

Read 2 more answers

The expression 2l + 2w is used to find the perimeter of a rectangle with length l and width w. What is the perimeter of a rectan

goldfiish [28.3K]

Answer:

36cm

Step-by-step explanation:

2l + 25

l=14cm, w= 4cm

2(14cm+4cm)=

28cm + 8cm=

36cm

5 0

4 years ago