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3 years ago

I really don't understand these two equations to find y. 1. 2y+3x=-6. 2. x+0.25y=1.5

Mathematics

1 answer:

LenaWriter [7]3 years ago

8 0

Y=-3x/2-3

y=-4x+6

that is you answer

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Write an equation in point point-slope form of the line having the given slope that contains the point m=4, (2,5)

Nataly_w [17]

Answer:

$\large\boxed{y-5=4(x-2)}$

Step-by-step explanation:

The point-slope form of an eqution of a line:

$y-y_1=m(x-x_1)$

m - slope

(x₁, y₁) - point on a line

We have

$m=4,\ (2,\ 5)\to x_1=2,\ y_1=5$

Substitute:

$y-5=4(x-2)$

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3 years ago

4x - (3y + 7x) = 4x - 3y +7x

kompoz [17]

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6 0

4 years ago

Alex and Josh rode bikes. Alex rode 15 miles in 55 minutes. Josh rode 77 minutes at a faster rate per mile than Alex. Find Alex'

Helga [31]

Answer:

a) $x = \frac{11}{3}\,\frac{min}{mi}$ , b) $y = \frac{77}{15}\,\frac{min}{mi}$

Step-by-step explanation:

a) The indicator is equal to the ratio of total time to travelled distance:

Alex

$x = \frac{55\,min}{15\,mi}$

$x = \frac{11}{3}\,\frac{min}{mi}$

b) In the case of Josh, the ratio must be greater than x. Then:

$y = \frac{77\,min}{15\,mi}$

$y = \frac{77}{15}\,\frac{min}{mi}$

8 0

4 years ago

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Neko [114]

Answer:

$t\leqslant 400$

3 0

3 years ago

Read 2 more answers

Find the standard deviation for the given sample data. Round your answer to one more decimal place than is present in the origin

Tema [17]

Answer:

s = 19.7

Step-by-step explanation:

First we need to calculate the mean x' of the sample as:

$x'=\frac{55+18+39+20+20+44+69}{7}=37.9$

We sum all the scores and divide them by the number of scores.

Then, the standard deviation s is calculated as:

$s=\sqrt{\frac{(55-37.9)^2+(18-37.9)^2+(39-37.9)^2+(20-37.9)^2+(20-37.9)^2+(44-37.9)^2+(69-37.9)^2}{7-1} }\\ s=19.7$

We square every score less the mean, sum every value, then divide that by the number of scores less 1 and finally, we calculate the square root.

So, the standard deviation of the sample is 19.7

8 0

4 years ago