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3 years ago

PLEASE HELP!!!!! THIS IS TIMED!!!!!! PLEASE HELP ME!!!!!!!!!!!!!!!!

Mathematics

2 answers:

goldfiish [28.3K]3 years ago

7 0

41. is the answer lol. i mixed it up

elena-14-01-66 [18.8K]3 years ago

5 0

Answer

840

Step-by-step explanation:

When your doing that multiply then divide by two them when you get that subtract it and get 840

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On a given day, the coldest surface temperature on the Moon, $-280$°F, is $53.6$°F colder than twice the coldest surface tempera

ale4655 [162]

1.)Convert Into Equation: -280=2x-53.6
2.)Simplify: -226.4=2x
3.)Isolate X: x=-113.2

X=-113.2

7 0

3 years ago

Read 2 more answers

With data from the 2009 National Health Interview Survey, the Centers for Disease Control estimated that 9.4% of U.S. children h

egoroff_w [7]

Answer:

$0.12 -1.96*0.013= 0.094$

$0.12 +1.96*0.013= 0.146$

And the best option would be:

0.094 to 0.146

Step-by-step explanation:

For this case we have the following info given:

$\hat p=0.12$ represent the proportion estimated

$SE = 0.013$ represent the standard error

$Confidence =0.95$ represent the confidence level

The confidence interval for the true proportion is given by:

$\hat p \pm z_{\alpha/2} SE$

And for 95% of confidence the critical value is $z_{\alpha/2}= 1.96$ and replacing we got:

$0.12 -1.96*0.013= 0.094$

$0.12 +1.96*0.013= 0.146$

And the best option would be:

0.094 to 0.146

5 0

3 years ago

What number is equivalent to the expanded form shown below?

Lesechka [4]

I think it is 240.430

4 0

4 years ago

Help me please!

telo118 [61]

Answer:

$f^{-1}(6) = 50$

Step-by-step explanation:

Given

$f(x) = \sqrt{2x} - 4$

Required

Find $f^{-1}(6)$

First, we calculate the inverse function

$f(x) = \sqrt{2x} - 4$

Express f(x) as y

$y = \sqrt{2x} - 4$

Swap the positions of x and y

$x = \sqrt{2y} - 4$

Solve for y: Add 4 to both sides

$4 + x = \sqrt{2y} - 4+4$

$4 + x = \sqrt{2y}$

Square both sides

$(4 + x)^2 = 2y$

Divide both sides by 2

$y = \frac{(4 + x)^2}{2}$

Express y as an inverse function

$f^{-1}(x) = \frac{(4 + x)^2}{2}$

Next, solve for: $f^{-1}(6)$

Substitute 6 for x

$f^{-1}(6) = \frac{(4 + 6)^2}{2}$

$f^{-1}(6) = \frac{(10)^2}{2}$

$f^{-1}(6) = \frac{100}{2}$

$f^{-1}(6) = 50$

7 0

3 years ago

A polynomial expression is shown below.

tester [92]

The polynomial is (mx^3+3)(2x²+5x+2)-(8x^5 +20x^4)
if it is reduced to 8x^3+6x²+15x+6, so we can find the value of m

(mx^3+3)(2x²+5x+2)-(8x^5+20x^4) = 8x^3+6x²+15x+6
2mx^5+5mx^4+2mx^3+6x²+15x+6-8x^5-20x^4=8x^3+6x²+15x+6
2mx^5+5mx^4+2mx^3=8x^3+6x²+15x+6-6x²-15x-6+ 8x^5+20x^4
= 8x^5+20x^4+8x^3= 4(2x^5+5x^4+2x^3)
finally

m(2x^5+5x^4+2x^3)=4(2x^5+5x^4+2x^3), and after simplification

C: m=4

4. When the expression is factored x²-3x-18 completely,

one of its factor is x-6
x²-3x-18=0
D= 9-4(-18)= 81, sqrtD=9 x=3-9/2= -6/2= -3, and x=3+9 / 2= 6
so x²-3x-18= (x-6)(x+6)

3 0

3 years ago