Will mark brainliest if correct! :)

Mathematics

1 answer:

fgiga [73]3 years ago

7 0

Answer:

The volume of cone = 1/3 vol of cylinder = 1/3 406.8 = 406.8/3 = 195.6

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A store advertise 15% off an item that regularly sells for 300$. What is the sale price of the item

erik [133]

Answer:

255

Step-by-step explanation:

(1-15%)a=300

a=255

7 0

3 years ago

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Solve each system of linear equations albebraically

ANEK [815]

Step-by-step explanation:

$1.\\\left\{\begin{array}{ccc}y=3x&(1)\\2y=6x&(2)\end{array}\right\\\\\text{Substitute (1) to (2):}\\\\2(3x)=6x\\6x=6x\qquad\text{subtract}\ 6x\ \text{from both sides}\\6x-6x=6x-6x\\0=0\qquad\text{TRUE}\\\\Answer:\ \text{Infinitely many solutions}\\\\\left\{\begin{array}{ccc}y=3x\\x\in\mathbb{R}\end{array}\right$

$2.\\\left\{\begin{array}{ccc}y=2x+5&(1)\\y-2x=1&(2)\end{array}\right\\\\\text{Substitute (1) to (2):}\\\\(2x+5)-2x=1\\2x+5-2x=1\qquad\text{combine like terms}\\(2x-2x)+5=1\\5=-1\qquad\text{FALSE}\\\\Answer:\ \text{No solution.}$

$3.\\\left\{\begin{array}{ccc}3x-2y=9\\-6x+4y=1&\text{divide both sides by 2}\end{array}\right\\\underline{+\left\{\begin{array}{ccc}3x-2y=9\\-3x+2y=0.5\end{array}\right}\qquad\text{add both sides of the equations}\\.\qquad\qquad0=9.5\qquad\text{FALSE}\\\\Answer:\ \text{No solution.}$

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2 years ago

An antelope can run at a speed of 61 miles per hour. What is the speed in yards per second

jekas [21]

0.489 yards per second

8 0

2 years ago

What is 75.65 rounded to the nearest whole number?

Nitella [24]

Answer:

Step-by-step explanation:

if the number after period is bigger than 5.. then it's about the number higher than the number befor the period

sorry if u have trouble understanding what I said I'm really not good at explaining:)

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2 years ago

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tomika plans to run 84 miles in 4 weeks. If she continues the pattern, how many miles will she run in 1yr.

drek231 [11]

She run in 28 days = 84 miles
So, 1 day, it will be = 84 / 28 = 3 miles

Now, in 1 year it would be = 365 * 3 = 1095

So, your final answer is 1095 miles

Hope this helps!

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2 years ago