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Sholpan [36]
3 years ago
7

Please answer this question! 26 points and brainliest!

Mathematics
2 answers:
Angelina_Jolie [31]3 years ago
5 0

Answer:

3x^2 -7x +2

Step-by-step explanation:

(15x^2 -35x +10)÷5

15/5 x^2 -35/5 x +10/5

3x^2 -7x +2

Tanzania [10]3 years ago
3 0

Answer:

The answer of this equation is 3x^2 -7x +2.

I hope this solves your question!

Step-by-step explanation:


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Most dermatologists recommend using sunscreens that have a Sun Protection Factor (SPF) of at least 30. One of the authors wanted
Basile [38]

Answer:  We are 95% confident that the mean SPF level of sunscreen used by all Cal Poly students is between 29.0813 and 40.0187.

Step-by-step explanation:

Given : Significance level : \alpha: 1-0.95=0.05

Sample size : n= 52 , which is a large sample (n>30), so we use z-test.

By using z-value table,

Critical value: z_{\alpha/2}=1.96

Sample mean : \overline{x}= 34.55

Standard deviation : \sigma= 20.12

The confidence interval for population means is given by :-

\overline{x}\pm z_{\alpha/2}\dfrac{\sigma}{\sqrt{n}}

i.e. 34.55\pm(1.96)\dfrac{ 20.12}{\sqrt{52}}

=34.55\pm5.46867829455\\\\\approx34.55\pm5.4687\\\\=(34.55-5.4687, 34.55+5.4687)=(29.0813,\ 40.0187)

Now, the 95% confidence interval for the ppopulation mean = . (29.0813, 40.0187)

Hence, We are 95% confident that the mean SPF level of sunscreen used by all Cal Poly students is between 29.0813 and 40.0187.

7 0
3 years ago
two angles are supplementary the first angle measures 40 degrees what is the measurement of the second angle
pogonyaev
Supplementary angles add up to 180
40+x=180
x=140
5 0
3 years ago
Read 2 more answers
The figure is rotated 360° clockwise with the origin as the center of rotation. Which graph represents the rotated figure?
Scilla [17]

Given

The figure is rotated 360° clockwise with the origin as the center of rotation. Which graph represents the rotated figure?

Answer

After the rotation of 360 degrees, a figure comes back to original position

Option A is correct

4 0
1 year ago
Last month, a carpenter made 2 tables. This month, he made 50% fewer tables. How many tables did the carpenter make this month?
blsea [12.9K]

Answer:

1

Step-by-step explanation:

2 divided by 2

8 0
2 years ago
Read 2 more answers
Three numerical expressions that are equivalent to (0.0004) x (0.005)
zzz [600]

Answer:

Numerical expression 1

\frac{4}{10000} * \frac{5}{1000}  = \frac{20}{10000000} = \frac{1}{500000}

Numerical expression 2

\frac{1}{50000} = 0.2 * 10^{-4} = 2 * 10^{-5}

Numerical expression 3

1 : 50000

Step-by-step explanation:

Numerical expression 1

\frac{4}{10000} * \frac{5}{1000}  = \frac{20}{10000000} = \frac{1}{500000}

Numerical expression 2

\frac{1}{50000} = 0.2 * 10^{-4} = 2 * 10^{-5}

Numerical expression 3

1 : 50000

4 0
2 years ago
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