Some one help ASAP!!

Mathematics

1 answer:

earnstyle [38]3 years ago

8 0

Okay where’s the question smarty

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What is the solution to the system of equations 8x-10y=-23 and 9x+10y=-16

sammy [17]

8x-10y=-23
9x+10y=-16
(8x+9x)+(10y-10y)=(-23+(-16))
17x+0y=-39
x=-39/17
8(-39/17)-10y=-23
-312/17-10y=-23
-10y=-23+312/17
-10y=-79/17
y=79/170

3 0

4 years ago

HELP PLZ! please answer 13 and 14.

AURORKA [14]

13. The words are telling you
.. HT +TS = HM +MS +2
.. (2x +1) +(x) = (x +1) +(x +2) +2
.. 3x +1 = 2x +5 . . . . . . . . . . . . . . collect terms
.. x = 4 . . . . . . . . . . . . . . . . . . . . . add -2x-1

HT +TS = 3x +1 = 3*4 +1 = 13 miles

The route via the theater is 13 miles.
Via the mall, the route is 11 miles.

14. Solve this the way you would any 2-step linear equation. Subtract terms that don't have h, and divide by the coefficient of h.

S = 2πr^2 +2πrh
S -2πr^2 = 2πrh
(S -2πr^2)/(2πr) = h

If you like, you can rearrange this to
.. h = (S/(2πr)) -r

3 0

4 years ago

Quotient of two more than a number and eight

aev [14]

Answer: This would be expressed as: " (x + 2) / 8 " .

5 0

3 years ago

A cistern is leaking 0.25 liters of water per minute. Approximately how many gallons of water is the cistern losing per hour? (P

nikklg [1K]

The cistern is losing approximately 3.963 gallons of water per hour.

Explanation

A cistern is leaking 0.25 liters of water per minute.

We know, 1 gallon = 3.785 liters

So, 0.25 liters = $\frac{0.25}{3.785}=0.06605...$ gallons

That means, the cistern is losing 0.06605....gallons of water per minute.

So, the amount of water losing in 1 hour or 60 minutes $=(0.06605...*60) gallons= 3.963 gallons$ (Approximately)

7 0

4 years ago

Read 2 more answers

Suppose the heights of 18-year-old men are approximately normally distributed, with mean 67 inches and standard deviation 5 inch

Karolina [17]

(a) The probability that an individual is within 1 standard deviation of the mean is 0.1585

(b) The probablity that the mean of a sample of 12 is within 1 standard deviation of the population mean is 0.5116

6 0

4 years ago