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3 years ago

Can anybody please help me with this math problem?

Mathematics

1 answer:

insens350 [35]3 years ago

4 0

Answer:

B. (15, 19)

Step-by-step explanation:

To check to see if a particular ordered pair is a solution to an equation, use the values for the variables and see if the equation is true.

A. 4/5(0) +7 = 7 ≠ 1

B. 4/5(15) +7 = 19 . . . . . . is a solution

C. 4/5(-5) +7 = 3 ≠ 11

D. 4/5(-2) +7 = 27/5 ≠ 1

A calculator can help with this.

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What is vaule of y when x=4'5

Degger [83]

Answer:

$y = 2.096$ or $y = \frac{2\sqrt5+6}{5}}$

Step-by-step explanation:

Given

$y = \frac{4}{x} + \sqrt x + 0.2 - 5x$

$x = \frac{4}{5}$

Required

Find y

$y = \frac{4}{x} + \sqrt x + 0.2 - 5x$

Substitute $x = \frac{4}{5}$

$y = \frac{4}{4/5} + \sqrt{4/5} + 0.2 - 5 * 4/5$

$y = 5 + \sqrt{4/5} + 0.2 - 4$

Collect like terms

$y = \sqrt{4/5} + 5 + 0.2 - 4$

$y = \sqrt{\frac{4}{5}} + 1.2$

Split the surd

$y = \frac{\sqrt4}{\sqrt5}} + 1.2$

$y = \frac{2}{\sqrt5}} + 1.2$

Rationalize

$y = \frac{2\sqrt5}{\sqrt5*\sqrt5}} + 1.2$

$y = \frac{2\sqrt5}{5}} + 1.2$

Take LCM and add

$y = \frac{2\sqrt5+1.2*5}{5}}$

$y = \frac{2\sqrt5+6}{5}}$

or solve as:

$y = \frac{2*2.24+6}{5}}$

$y = \frac{10.48}{5}$

$y = 2.096$

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3 years ago

Jordan found cloth for $7.50 per yard. How much would his total cost be if he needed 12 yards of cloth?

AleksandrR [38]

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3 years ago

The growth of a newly identified bacteria can be modeled by G(t) = 100(1.037)24t, where G(t) is the total number of cells after

mariarad [96]

Answer:

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Step-by-step explanation:

Given in the question the equation:

G(t) = 100(1.037)24t

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cells present at start = when t = 0

a = 0

cells present after an hour = t = 1

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<h3>Put these values in the formula</h3>

f(1) - f(0) / (1 - 0)

100(1.037)24(1) - 100(1.037)24(0) / 1

3288 - 0 / 1

3288 / 1

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3 years ago

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Ymorist [56]

Answer:

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Step-by-step explanation:

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