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Aloiza [94]
3 years ago
9

I need help in both answers ASAP!!!!

Mathematics
2 answers:
maria [59]3 years ago
3 0
A.) 2nd option and 7(x-2)=56

B.) X=10
7x-14=56
7x=70
X=10
Ivahew [28]3 years ago
3 0
2nd one that’s the answer
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Gravel is being dumped from a conveyor belt at a rate of 15 ft3/min, and its coarseness is such that it forms a pile in the shap
gayaneshka [121]

Answer:

0.13 ft/min

Step-by-step explanation:

We are given that

\frac{dV}{dt}=15ft^3/min

We have to find the increasing rate of change of height of pile  when the pile is 12 ft high.

Let d be the diameter of pile

Height of pile=h

d=h

Radius of pile,r=\frac{d}{2}=\frac{h}{2}

Volume of pile=\frac{1}{3}\pi r^2 h=\frac{1}{12}\pi h^3

\frac{dV}{dt}=\frac{1}{4}\pi h^2\frac{dh}{dt}

h=12 ft

Substitute the values

15=\frac{1}{4}\pi(12)^2\frac{dh}{dt}

\frac{dh}{dt}=\frac{15\times 4}{\pi(12)^2}

\frac{dh}{dt}=0.13ft/min

7 0
4 years ago
you go to a grocery store and buy a $2.50 bag of sugar and a sandwich for $1.75. The sales tax for your state is 7%. What is the
Rashid [163]

Answer: My guess is $4.55


Step-by-step explanation:

2.50 + 1.75 = 4.25 (This is the total of everything you bought)

4.25 x 0.07= 0.2975 (0.2975 is 7% of 4.25 but because this is money I will round it to <em>0.30</em>)

(0.30 is the tax so now add it to the original amount)

$4.25 + $0.30 = $4.55



8 0
3 years ago
Solve for x<br>a.81<br>b.41<br>c.1681
Jlenok [28]
A=9 , b=40

Pythagorean theorem
a^2+b^2=x^2 \\\\ x=\sqrt{a^2+b^2}=\sqrt{9^2+40^2}=\sqrt{81+1600}=\sqrt{1681}=\sqrt{41^2}=41
5 0
4 years ago
Shawn read 3/4 of a chapter of his history book in 1/6 of an hour at this rate how many chapters of his history book can he read
seropon [69]
One-sixth of an hour is 10 minute
10 minutes 3/4 chapter
 Therefore, 10 minutes x 6= 3/4x6
Shawn can read 4.5 chapters in one hour
4 0
4 years ago
Jana is on a two-day hike. The function graphed shows the total distance she hiked, in miles, after x hours on the second day.
evablogger [386]
Just took the same quiz.

The slope is 2.
The slope represents <span>the number of miles hiked every hour.</span>
4 0
4 years ago
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