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3 years ago

Hurry please, 20 points

Mathematics

2 answers:

nekit [7.7K]3 years ago

5 0

Answer:

Step-by-step explanation:

Parallel slope = -8

Perpendicular slope = 1/8

AnnZ [28]3 years ago

3 0

The slope of y=8x+5 is 8, because it is in slope intercept form: y=mx+b form, where m is the slope. I think this is right sorry if I’m wrong!!

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Which of the following is a rational number?<br> 148, 49, 50, 51

Katarina [22]

Answer:

50 is the answer because you can divide 2 numbers to get this number.

4 0

3 years ago

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Which ordered pair is a solution of the equation 2x − y = 9?

gladu [14]

The correct answer is: [C]: " (5, 1) ".

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Explanation:

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Choice: [C]: " x = 5 " ; " y = 1 " ;

Note: Given the equation: " 2x - y = 9 " .

→ Plug in " 5 " for "x" , and " 1 for " y " ;

to get: " [2 * 5] - [1] = 10 - 1 = " 9 " ; and: " 9 = 9 " .

So, Choice: [C]: " (5, 1) " — is the CORRECT ANSWER.

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Let us consider the "other answer choices" ; as follows:

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Choice: [A]: "x = - 4 " , "y = 1" ; Plug in these values for the given equation:

→ " 2x - y = 9 " ;

→ " (2 * -4) - (5) = - 8 - 5 = " - 13 " ; and: " - 13 ≠ 9 " .

→ So: Answer choice: [A]: is INCORRECT.

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Choice [B]: "x = -2" , "y = 5" ; Plug in these values for the given equation:

"2x - y = 9 " ;

→ " (2 * -2) - (5) = -4 - 5 = -9 ; and: " -9 ≠ 9 " .

→ So: Answer choice: [B]: is INCORRECT.

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Choice: [D]: "x = 6 " , "y = - 3" ; Plug in these values for the given equation:

"2x - y = 9 " ;

→ " (2 * 6) - ( -3) = 12 - (-3) = 12 + 3 = " 15 " ; and: " 15 ≠ 9 " .

→ So: Answer choice: [D]: is INCORRECT.

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→ The correct answer is: [C]: " (5, 1) " .

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6 0

4 years ago

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Use FOIL to explain how to find the product of (a + b)(a − b). Then describe a shortcut that you could use to get this product w

andriy [413]

Greetings!

FOIL stands for:

Front
Outside
Inside
Last

This tells which terms to multiply when using the Distributive Property.
(NOTE: Only applicable with 2-term Polynomials)

For Example:
$(a+b)(a-b)$

Multiply the Fronts of both Equations:
$(a*a)$

Multiply the Outsides of both Equations:
$(a*a)+(a*-b)$

Multiply the Insides of both Equations:
$(a*a)+(a*-b)+(b*a)$

Multiply the Lasts of both Equations:
$(a*a)+(a*-b)+(b*a)+(b*-b)$

Simplify.
$=a^2-ab+ba-b^2$

$=a^2-b^2$

Alternative Method (My Prefered Method)
$(a+b)(a-b)=a(a+b)-b(a+b)$

Use Regular Distributive Property.
$a(a+b)-b(a+b)$

$a*a+a*b-b*a+-b*b$

Simplify.
$a^2+ab-ba+-b^2$

$a^2-b^2$

Hope this helps.
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3 years ago

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What annual rate of interest is required to triple an investment in 7 years if it were compounded quarterly?

Jobisdone [24]

Answer:

Option C) 16.01%

Step-by-step explanation:

we know that

The compound interest formula is equal to

$A=P(1+\frac{r}{n})^{nt}$