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3 years ago

0.25(x + 4) – 3 = 28

Mathematics

1 answer:

In-s [12.5K]3 years ago

7 0

Answer:

x = 120

Step-by-step explanation:

Given

0.25(x + 4) - 3 = 28 ( add 3 to both sides )

0.25(x + 4) = 31 ( divide both sides by 0.25 )

x + 4 = 124 ( subtract 4 from both sides )

x = 120

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4^3/2 Rewrite in radical form and then simplify

german

Answer:

Step-by-step explanation:

radical form conversion uses the equation: $\alpha ^\frac{z}{n} = `^n\sqrt{a^x}$

Use the rule to convert 4^3/2 to a radical, where a = 4, x = 3, and n = 2

$\sqrt{4^3}$

simplified, your answer is 8

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2 years ago

Read 2 more answers

Y=-2x+2 y=1/3x-5 help pls

kupik [55]

The top part is -2(x-1). You have to factor out -2 from the expression. I don't know the second part, Sorry!

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3 years ago

which set of three numbers could be the side lengths of a triangle A.5,5,14 B.3,3,2 C.3,3,8 D. 5,5,10

Ivanshal [37]

Answer:

B. 3, 3, 2

Step-by-step explanation:

The triangle inequality requires the sum of the lengths of the two shortest sides exceed the length of the longest side. That is the case only for the lengths of selection B:

2 + 3 > 3

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3 years ago

Write the equation of the parabola with a focus at (-3, -5) and a directrix at y = -7.

lilavasa [31]

Answer:

The directrix is negative so the equation will be

x^2=4ay

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x^2=4*(9/20)*y

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Step-by-step explanation:

The directrix always determine the equation to use. It is also important to notice the sign(-+).

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3 years ago

In a lab experiment, the decay of a radioactive isotope is being observed. At the beginning of the first day of the experiment t

GaryK [48]

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A decaying exponential function is modeled by:

$A(t) = A(0)(1 - r)^t$

In which:

A(0) is the initial value.

r is the decay rate, as a decimal.

At the beginning of the first day of the experiment the mass of the substance was 500 grams and mass was decreasing by 8% per day, hence A(0) = 500, r = 0.08, and the equation is given by:

$A(t) = A(0)(1 - r)^t$

$A(t) = 500(1 - 0.08)^t$

$A(t) = 500(0.92)^t$

At the 13th day, the mass is given by:

$A(13) = 500(0.92)^{13} = 169.1$

More can be learned about exponential functions at brainly.com/question/25537936

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2 years ago