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notsponge [240]
3 years ago
6

HELP ILL MARK AS BRAINLIEST what’s the surface area?

Mathematics
1 answer:
svetoff [14.1K]3 years ago
4 0

Step-by-step explanation:

SURFACE AREA of a cylinder is 2×pi×r×(h+r)

=> 2×3.14×7×(8+7)

=>43.96×(15)

=>659.4 mm^2

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Ajar holding 36 coins, only nickels and quarters, is worth $6.20. There are eight more quarters than there are nickels. How many
Nonamiya [84]

Answer:

  14

Step-by-step explanation:

Let n represent the number of nickels. Then the number of quarters is 36-n. The difference is ...

  (36-n) -n = 8 . . . . . 8 more quarters than nickels

  18 -n = 4 . . . . . . . divide by 2

  14 = n . . . . . . . . add n-4 to both sides

There are 14 nickels in the jar.

_____

<em>Additional comment</em>

The problem supplies more information than is needed for a solution. You can work this as a "sum and difference" problem, as we have above, or you can work it as a "mixture" problem where the total coin value comes into play. Any two of the three given relations will give a solution.

  n + q = 36 . . . . . . . number of coins

  5n +25q = 620 . . . value of coins (in cents)

  q -n = 8 . . . . . . . . difference in number of coins

6 0
3 years ago
Please answer 1,2,3, and 4
Anika [276]

Answer:

<u><em>1: "An equilateral triangle is never an obtuse triangle" & "An equilateral triangle is never an isosceles triangle." </em></u>

<u><em> </em></u>

<u><em>2: Acute Isosceles Triangle </em></u>

<u><em> </em></u>

<u><em>3: False! Option B. </em></u>

<u><em> </em></u>

<u><em>4: D</em></u>

Step-by-step explanation:

2: Isosceles Triangles have two equal sides. An acute triangle (or acute-angled triangle) is a triangle with three acute angles (less than 90°). An obtuse triangle (or obtuse-angled triangle) is a triangle with one obtuse angle (greater than 90°) and two acute angles.

3: An <u>equilateral triangle</u> is a triangle in which all the sides and all the angles are equal.

4: In order for a triangle to be <u>isosceles</u>, it has to have two same sides. For a triangle to be <u>equilateral</u>, all sides and angles need to be the same. Refer to reasoning in Question 2 for next explanation.

5 0
3 years ago
Help solving this math problem
Lady_Fox [76]

Answer:55 degrees

Step-by-step explanation:

So the two problems both ave TS which meant R is 20 and W is 25

and T is 10 and S is 10.

so

R 20 +

S 10 +

W 25 =

RSW 55

7 0
3 years ago
Read 2 more answers
Subtract x^2-6x+4 from 2x^2+4x-8
Rasek [7]
2X^2+4X-8-X^2+6X-4
X^2+4X-8+6X-4
X^2+10X-12
3 0
2 years ago
Find the soluations to (x+3)^2=49
Jobisdone [24]

Answer:

x = 4 , − 10

Step-by-step explanation:

3 0
3 years ago
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