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1 year ago

PLEASE ITS DUE SOON!

Mathematics

2 answers:

ivann1987 [24]1 year ago

7 0

Answer:

the answer is a=12 and b=13

Step-by-step explanation:

Im not giving u the explanation u should have listened in ms Aya's class.

den301095 [7]1 year ago

3 0

Answer:

bro its ur math caps do it urself

Step-by-step explanation:

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What type of rock do we have in Florida naturally. If it is not this kind of rock someone has brought it here. Group of answer c

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Answer:

D. Sedimentary Rock

Explanation:

Limestone, various kinds

Hope that helps

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3 years ago

Solve each equation for x. 1.3x + 9x = 6x + 42

Vlad [161]

Answer:

Just use a calcultor...

Step-by-step explanation:

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3 years ago

Which statement about y=x^2-14x+45 is true

Sonbull [250]

It should be A. Just factor 45

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2 years ago

Yolanda's club requires that 60% of the members be present for any vote. If at least 40 members must be present to have a vote,

Dmitry [639]

Hi! So at least 60% of the members must be present, and that number is at least 40. To find the total amount of members, we can write and solve a proportion. Set it up like this:

40/x = 60/100

This is because we are looking for the total amount numbers and we already know the part. Cross multiply the values. 40 * 100 is 4,000. 60 * x is 60. You get 4,000 = 60x. Now, divide each side by 60 to isolate the x. 4,000/60 is 66.666667 or 67 when rounded to the nearest whole number. x ≈ 67. Yolanda's club currently has 67 members.

8 0

3 years ago

The water content of soil from a borrow site is normally distributed with a mean of 14% and a standard deviation of 2.5%. What i

Vladimir [108]

Answer:

0.424 is the probability that a sample taken from the site will have a water content above 16% or below 12%.

Step-by-step explanation:

We are given the following information in the question:

Mean, μ = 14%

Standard Deviation, σ = 2.5%

We are given that the distribution of water content of soil is a bell shaped distribution that is a normal distribution.

Formula:

$z_{score} = \displaystyle\frac{x-\mu}{\sigma}$

P(water content above 16% or below 12%)

= 1 - P(water content between 12% and 16%)

$=1 - P(12 \leq x \leq 16) =1 - P(\displaystyle\frac{12 - 14}{2.5} \leq z \leq \displaystyle\frac{16-14}{2.5})\\\\=1 - (P(-0.8 \leq z \leq 0.8))\\\\=1 -(P(z \leq 0.8) - P(z < -0.8))\\=1-( 0.788 -0.212) = 0.424 = 42.4\%$

0.424 is the probability that a sample taken from the site will have a water content above 16% or below 12%.

7 0

2 years ago