3 years ago

Plz help me with this one

Mathematics

1 answer:

AnnyKZ [126]3 years ago

8 0

Answer:

-3 -5 and 1, 3

Step-by-step explanation:

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A boogie board that has a regular price of $6. If the sales tax on the boogie board is 7%, what is the total cost of the board?

zavuch27 [327]

Answer:

6.42$

Step-by-step explanation:

6.00 divided by 100 equals 0.6 multiplied by 7 equals 0.42 so the sales tax is 0.42 cents and the total is 6.42$

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3 years ago

Please help me: What's the domain? What's the range? Is it a function?

VladimirAG [237]

Answer:

$\displaystyle Yes \\ Range: Set-Builder\:Notation → [f(x)|-2 ≤ f(x) ≤ 4] \\ Interval\:Notation → [-2, 4] \\ \\ Domain: Set-Builder\:Notation → [x|0 ≤ x ≤ 7] \\ Interval\:Notation → [0, 7]$

Step-by-step explanation:

Just by looking at the graph vertically and horisontally, you can tell what the range and domain is, depending on whether the segments are closed or opened.

* This is a function because it passes the vertical line test.

** This is kind of like a sine wave.

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3 years ago

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What is the square root of 36 over 49

Ghella [55]

$\sqrt{\frac{36}{49}}= \frac{6}{7}$

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3 years ago

Solve the following system of equations by substitution and select the correct answer below:

Anni [7]

The answer is x= 4 and y= -3

6x-4y=36 -- (1)

2x-8y=32- (2)

from (1)
-4y= 36-6x
y= -9+3/2x

(3) into (2)
2x-8(-9+3/2x)=32
2x+72-12x=32
72-10x=32
-10x= -40
x= 4

sub x=4 into y= -9+3/2x
y= -9+3/2(4)
y= -3

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4 years ago

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(19x^2+12x+12)+(7x^2+10x+13)

MatroZZZ [7]

Answer:

$26x^2+22x+25$