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3 years ago

Y=.25x x+4y=8 what is y

1 answer:

6 0

Y=0.25x Equation 1
x+4y=8 Equation 2
Substitute value of y in equation 2.
x+4(0.25x)=8
x+1x=8
2x=8
x=4
Now put value of x in equation 1 to get y.
y=0.25(4)
y=1

Answer: y=1

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John invests $250 at 15% interest compounded monthly. How much will he have in 20 years?

atroni [7]

Answer:

$4928.87

General Formulas and Concepts:

Pre-Algebra

Order of Operations: BPEMDAS

Brackets
Parenthesis
Exponents
Multiplication
Division
Addition
Subtraction

Left to Right

Algebra I

Compounded Interest Rate Formula: $\displaystyle A = P(1 + \frac{r}{n})^{nt}$

P is principle amount
r is rate
n is compound rate
t is time

Step-by-step explanation:

Step 1: Define

Identify variables

P = 250

r = 15% = 0.15

n = 12

t = 20

Step 2: Solve

Substitute in variables [Compounded Interest Rate Formula]: $\displaystyle A = 250(1 + \frac{0.15}{12})^{12 \cdot 20}$
[Exponents] Multiply: $\displaystyle A = 250(1 + \frac{0.15}{12})^{240}$
(Parenthesis) Divide: $\displaystyle A = 250(1 + 0.0125)^{240}$
(Parenthesis) Add: $\displaystyle A = 250(1.0125)^{240}$
Evaluate exponents: $\displaystyle A = 250(19.7155)$
Multiply: $\displaystyle A = 4928.87$

5 0

3 years ago

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tatuchka [14]

Answer:

D. (90, 60)

Step-by-step explanation:

A proportional relationship is a relationship in which the ratios of two variables are equivalent.

If we take two points on the graph such as (45, 30) and (30, 20), we can see that they can both be simplified to the ratio 3:2. Using this we can find the correct answer. From looking at all the points we can see that only (90,60) would also form a ratio of 3:2, thus d would be the correct answer.

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Answer:

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Step-by-step explanation:

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3 years ago

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Tema [17]

For this case we have the following equation:

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