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KIM [24]
4 years ago
11

A student performs an experiment to find out if adding 1 teaspoon of salt to a bubble solution of soap and water affects bubble

making.
What is the independent and dependent variable?
Please help!!!!!!!!!
Mathematics
1 answer:
Zina [86]4 years ago
6 0
Independent variable: 1 tsp. salt
dependant variable: bubble solution
Because you're adding the salt to the solution, the salt is independant. that's what is making the change. the dependant variable is what is being tested; the bubble solution.
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What is the perimeter of a rectangle with a length of (x^2+x) and a width of (2x^2+3x)
Mazyrski [523]

Answer:

Perimeter = 6x² + 8x

Step-by-step explanation:

Perimeter = 2(length + width)

perimeter = 2((x²+x)+(2x²+3x))

perimeter = 2(x²+2x² + x+3x)

perimeter = 2(3x² + 4x)

perimeter = 2*3x² + 2*4x

perimeter = 6x² + 8x

5 0
3 years ago
Oliver plans to purchase a $1500 certificate of deposit (cd) at his bank. The CD will earn 2.3% interest, compounded semi-annual
vekshin1

Answer:

Step-by-step explanation:

Weren't there more instructions?  Please, share everything about each problem you post here.

Use the compound amount formula:  A = P(1 + r/n)^(nt).

Here we have

A = $1500(1 + 0.023/2)^(2t), where t is the number of years.

3 0
3 years ago
The city of Atlanta recently increased their sales tax from 7.5% to 8%. How much more tax would you pay on a $10 purchase?
dusya [7]
Well.. \bf {{ a}}\%\ of\ b \implies  \cfrac{{{ a}}}{100}\cdot b\implies {{ a}}\div 100\cdot b\\\\
-----------------------------\\\\
thus
\\\\\\
{{ 7.5}}\%\ of\ 10 \implies  \cfrac{{{ 7.5}}}{100}\cdot 10\qquad and\qquad {{ 8}}\%\ of\ 10 \implies  \cfrac{{{ 8}}}{100}\cdot 10

get both, check their difference, that's how much more tax you'd be paying from 7.5% to 8% on $10
5 0
3 years ago
Read 2 more answers
The equation, y = 1250x + 22,850, gives the salary of a person as "y" after the stated number of years (x). Model the data with
Sidana [21]

Answer:

(a) y = 6250x +17850 --- The function

(b) y = 49100 --- The salary in 5 years

Step-by-step explanation:

Given

y = 1250x + 22850

Solving (a): Model the function around (1,24100) and (3,36600)

First, we calculate the slope

m = \frac{y_2 - y_1}{x_2 - x_1}

m = \frac{36600 - 24100}{3 - 1}

m = \frac{12500}{2}

m = 6250

The function is then calculated as:

y = m(x - x_1) + y_1

y = 6250(x - 1) + 24100

y = 6250x - 6250 + 24100

y = 6250x +17850

Solving (b): Salary in 5 years

Here:

x = 5

So:

y = 6250x +17850

y = 6250*5 +17850

y = 49100

8 0
3 years ago
How many solutions does this equation have -4(x+5)=-4x-20
erica [24]

Your answer is <em>infinitely</em><em> </em><em>many</em><em> </em><em>solutions</em><em> </em>

Step-by-step explanation:

-4x+-20=-4x-20

+4× +4x

(4x cancel out)

Your left with

-20=-20

Therefore your answer is infinitely many solutions

8 0
3 years ago
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