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3 years ago

Solve solving systems using substitution.

Mathematics

1 answer:

yanalaym [24]3 years ago

3 0

Answer:

your answer would be D

Step-by-step explanation:

Substitute the x= 3y-1 in place of the x in the second equation

Subtract Like terms

Add 3 to both sides

Divide by 3(the coeffcient of y)

Answer is 5

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Pediatricians work an average of 48 h per week. The standard deviation is 12 hours. What percentage of pediatricians work more t

cricket20 [7]

Answer: 2.28 %

Step-by-step explanation:

Given : Mean : $\mu=\ 48$

Standard deviation : $\sigma= 12$

The formula to calculate the z-score :-

$z=\dfrac{x-\mu}{\sigma}$

For x = 72

$z=\dfrac{72-48}{12}=2$

The p-value = $P(2$

$1-0.9772498=0.0227502\approx0.0228$

In percent, $0.0228\times100=2.28\%$

Hence, the percentage of pediatricians work more than 72 h per week = 2.28 %

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4 years ago

What type of severe weather forms over warm water and rotates counter clockwise? Drought Flood Hurricane Tornado

dezoksy [38]

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3 years ago

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Three paths intersect to form a right triangle as shown here. The path from the picnic area to the fountain is 500 yards. The pa

nata0808 [166]

Answer:

400 yd

Step-by-step explanation:

It's a 3 - 4 - 5 triangle

If the hypotenuse is a multiple of 5 and another length is the same multiple of 3 or 4, the one left over will be the same multiple of the one that's left.

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3 years ago

Find the length of AB?<br> Round to the nearest tenth

aev [14]

Answer:

AB ≈ 8.5

Step-by-step explanation:

$a^{2} + b^{2} = c^{2} \\\\c = \sqrt{a^{2} + b^{2} } \\\\c = \sqrt{6^{2} + 6^{2} } \\\\c = \sqrt{36 + 36 } \\\\c = \sqrt{72 } \\\\c = 8.48528137424 \\$

c ≈ 8.5

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4 years ago

How i can answer this question, NO LINKS, if you answer correctly i will give u brainliest!

gavmur [86]

Answer: A. they will have too much butter

Step-by-step explanation: to much

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2 years ago