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3 years ago

Plz help its due right now

Mathematics

1 answer:

Anna35 [415]3 years ago

3 0

Answer:

2.64

Step-by-step explanation:

x² + 6= 13

x² = 13-6

x²= 7

x = square root of 7

x = 2.64

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The city of Atlanta recently increased their sales tax from 7.5% to 8%. How much more tax would you pay on a $10 purchase?

I am Lyosha [343]

Answer is B
find how much tax you pay at both rates
10(0.075)=.75
10(0.08)=.8
then subtract
0.8-0.75=0.05
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3 years ago

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Graph x^3 + 3x^2 − x − 3 = 0. What are the solutions to the equation?

soldi70 [24.7K]

Answer:

x = −1, x = 1, and x = - 3

Step-by-step explanation:

hello :

if : x=1 1^3 + 3×1^2 − 1 − 3 =1+3-1-3 =4-4=0......true

if : x=-1 (-1)^3 + 3×(-1)^2 +1− 3 =-1+3.+1-3.=0...true

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4 years ago

Can I get some help, it is due in 15 minutes and I need help. Thanks, any help appreciated

koban [17]

Well, I'm way past the 15 min mark, but here's how to do the question.

With this, you will need to use the distance formula, $\sqrt{(x_2-x_1)^2+(y_2-y_1)^2}$ , on XY, YZ, and ZX.

XY: $\sqrt{(3-1)^2+(1-6)^2}$

Firstly, solve inside the parentheses: $\sqrt{(2)^2+(-5)^2}$

Next, solve the exponents: $\sqrt{4+25}$

Next, solve the addition, and XY's distance will be √29

(The process is the same with the other 2 sides, so I'll go through them real quickly)

YZ:

$\sqrt{(6-3)^2+(3-1)^2}\\ \sqrt{(3)^2+(2)^2}\\ \sqrt{9+4}\\ \sqrt{13}$

ZX:

$\sqrt{(1-6)^2+(6-3)^2}\\ \sqrt{(-5)^2+(3)^2}\\ \sqrt{25+9}\\ \sqrt{34}$

Now that we got the 3 sides, we can add them up: $\sqrt{29}+\sqrt{13} +\sqrt{34} =14.8$

In short, your answer is 14.8, or the second option.

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3 years ago

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Sergeu [11.5K]

Answer:

Step-by-step explanation:

Attached file

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3 years ago

A student raises her grade average from a 75 to a 90. What was the percent of increase

son4ous [18]

This can be solved algebraically. Before we start, as context, to find a percentage you multiply by the percentage/100.

$75*x=90 \\ x= \frac{90}{75} \\ \\ \boxed{x=1.2}$

This tells us that 90 is 120% of 75. However, your question wants us to find the increase, therefore we don't need that 100.
Therefore, the increase is 20%.

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4 years ago