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Damm [24]

3 years ago

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Mathematics

2 answers:

konstantin123 [22]3 years ago

3 0

Answer:

x = -4

Step-by-step explanation:

-5x -10 = 10

First thing to do when solving one-variable linear equations is to get the variable by itself. We can do this by adding 10 to both sides:

-5x = 20

Now that we have -5x on one side of the equation we can divide the equation by -5 to get x:

x = -4

yaroslaw [1]3 years ago

3 0

Answer:

$- 5x - 10 = 10 \\ - 5x = 10 + 10 \\ - 5x = 20 \\ x = - \frac{20}{4} \\ x = - 5$

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The difference between 4/9 of a number and 7 is 5

vodomira [7]

first what quantities do we need to talk about?

the problem speaks of “a number”, let’s call that number x.

now write the equation that relates x to the other numbers we know.

the first clue is the word “difference”.

this means “subtraction”, but we need to subtract something from something else.

what are the two somethings? ”a number times 7” and “4”.

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it says the difference is 9. So complete the equation x*7 - 4 = 9 if we rewrite this cosmetically, 7x - 4 = 9

i assume that you know how to solve this for x.

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3 years ago

Find the number of real number solutions for the equation. x2 + 9x + 20 = 0

fiasKO [112]

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3 years ago

List possible rational zeroes of the function. 3x^5-8x^4+6x^2+7x-12.

spayn [35]

First list all the positive and negative factors of the constant term in the expression: ±(1,2,3,4,6,12) these will be the values for "p"

Second list all the positive and negative factors of the leading coefficient:
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Now list all the possible values of $\frac{p}{q}$ these will be the possible rational zeros of the polynomial function:
±( $\frac{1}{1} , \frac{1}{3} , \frac{2}{1} , \frac{2}{3} , \frac{3}{1} , \frac{3}{3}, \frac{4}{1} , \frac{4}{3} , \frac{6}{1} , \frac{6}{3} , \frac{12}{1} , \frac{12}{3}$ )

these can be reduced to the following list:
±(1, $\frac{1}{3}$ , 2, $\frac{2}{3}$ , 3, 4, $\frac{4}{3}$ , 6, 12

This list represents the possible rational zeros of the function. You can then use synthetic division to narrow down the actual roots of the function.

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3 years ago

1. Scientists randomly select ten groups from a population of men over 50 years old. They calculate the mean

DedPeter [7]

Answer:

Step-by-step explanation:

Sampling Variability

Hope that helped! :)

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3 years ago

Peter wants to buy a duplex with a purchase price of $226,950. Peter can afford a 10% down payment. Peter earns $2,985 a month a

oee [108]

Peter borrows 226,950*0.9=204255

Assuming the mortgage is compounded monthly, the total monthly mortgage payment is
A=P(i(1+i)^n)/((1+i)^n-1)
where
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A=monthly payment
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His monthly payment
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3 years ago

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