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Lena [83]
3 years ago
8

I have a final for summer schoollll due midnight and it’s 10:23!!!!!!!!!!!!

Mathematics
1 answer:
shtirl [24]3 years ago
6 0
26 good luck n I hope you pass
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Let $r$ and $s$ be the roots of $3x^2 + 4x + 12 = 0.$ Find $r^2 + s^2.$ Pls help.
nirvana33 [79]

Answer:

-56/9

Step-by-step explanation:

By Vieta's formulas,

$r + s = -\frac{4}{3}$ and $rs = \frac{12}{3} = 4.$ Squaring the equation $r + s = -\frac{4}{3},$ we get

$r^2 + 2rs + s^2 = \frac{16}{9}.$ Therefore,

$r^2 + s^2 = \frac{16}{9} - 2rs = \frac{16}{9} - 2 \cdot 4 = -\frac{56}{9}}$

5 0
3 years ago
What number is ten times as much as 50,070
pantera1 [17]
500,700. is the answer
5 0
3 years ago
Read 2 more answers
If the area of a square is 121cm2 what is it’s side length
joja [24]

Answer:

Step-by-step explanation:

Area of a square

Area = l*l

121=l^2

l=√121

L=11cm

7 0
3 years ago
Hayden built a wooden sculpture with the dimensions
lisabon 2012 [21]

Answer:

c

Step-by-step explanation:

took test & got it right

8 0
2 years ago
Read 2 more answers
joey can paint a room in 2 hours and chelsea can paint the same room in 3 hours. if they work together how long would it take to
JulijaS [17]

Answer:

1.2\ hours

Step-by-step explanation:

we know that

<em>Joey can paint a room in 2 hours</em>

That means

Joey can paint the 100% of the room-------> 2 hours

so

In 1 hour ------> can paint 100%/2=50%

<em>Chelsea can paint a room in 3 hours</em>

That means

C<em>helsea</em> can paint the 100% of the room-------> 3 hours

so

In 1 hour ------> can paint (100%/3)=33.33%

therefore

Joey and Chelsea in 1 hour can paint -----> 50%+33.33%=83.33%

by proportion

\frac{1}{83.33}\frac{hour}{\%} =\frac{x}{100}\frac{hour}{\%}\\ \\x=100/83.33\\ \\ x=1.2\ hours

7 0
3 years ago
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