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fredd [130]
3 years ago
11

Solve F(x) for the given domain. F(x) = x ^2 + 3x - 2 F(3) = 13 16 40

Mathematics
1 answer:
olchik [2.2K]3 years ago
6 0
F(3) = 16, you simply plug in 3 for x to find the answer.
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How do I do #38? And do I have 35,36,37 correct? Because I rounded to the nearest 10th.
maria [59]

Since perimeter means all around it just means adding all the sides. Because you are given length and width your equation would then be, " (5)+(5)+(2x=14)+(2x+14). Now since area means length times width you would multiply length times width. Since x=7 you would multiply 7x5 and the area equals 35. Questions 35-37 are indeed correct. You're smart ! By the way I'm twelve so hopefully you found this helpful.

6 0
3 years ago
How to solve this equation equal to zero
hjlf
3x² -16x-12 =0

We can solve this equation using formula.

a=3, b=-16, c=-12

x= \frac{-b+/- \sqrt{b^{2} -4ac} }{2a} 
\\ \\ x= \frac{16+/- \sqrt{16^{2}+4*3*12} }{2*3} = \frac{16+/- \sqrt{400} }{6} = \frac{16+/-20}{6} 
\\ \\ x_{1}= \frac{16+20}{6} =6
\\ \\x_{2}=  \frac{16-20}{6} =- \frac{4}{6} = -\frac{2}{3}
8 0
3 years ago
2.2x+3y=15.25 <br>4.6x+2.1y=18.325<br>USING ELIMINATION<br>SHOW WORK PLEASE
Artist 52 [7]

-4.6(2.2x+3y=15.25) = -10.12x - 13.8y = -70.15

2.2(4.6x+2.1y=18.325) = 10.12x - 4.62y = 40.315

simplify

-4.62y = -29.835

divide both sides by -4.62 to isolate y

y= 6.46

2.2x + 3 (6.46) = 15.25

2.2x + 19.38 = 15.25

subtract 19.38 to both sides

2.2x = -4.3

divide 2.2 to both sides

x= -1.95

I hope that this helped :)

4 0
2 years ago
Which expressions is equivalent to 2r+(t+r)
azamat

Answer:

t+3r

Step-by-step explanation:

This is a one step solution

All you do is add like terms

In this case the only like terms are the varibles r

2r+(t+r)

so if you add all of the rs together there would be 3rs

So the rest of the problem would continue as normal while bringing the 3r to the end

t+3r

8 0
3 years ago
A store is having a sale where winter clothes are 60% of the original price. A sweater is on sale for $30 . What was the origina
Flura [38]
x-price\ before\ sale\\60\%=0.6\\100\%=1\\\\From\ proportion:\\\\0.6\ \ \ \ \ -\ \ \ \ 30\\1\ \ \ \ \ \ \ \ -\ \ \ \ x\\\\0.6x=30\ \ |:0.6\\x=50\\\\Original\ price\ was\ \$50.
8 0
3 years ago
Read 2 more answers
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