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Nikolay [14]
3 years ago
8

I need help plzzzzzz

Mathematics
1 answer:
AleksandrR [38]3 years ago
7 0
I believe the first one is 210
The party on Saturday was bigger. You know that Friday they had 31 people. Saturday they had 210 people.
The first one is 1+2(15)=31
The second one I’m not sure how to write up an equation for that because I just added 1+2+3+4+5..... and so on until 20 and got 210.
Not even sure if this is even right honestly, Just thought I’d at least try and help.
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WATER TOWER One of the largest sphere water towers in the country is located in Edmond, Oklahoma. It is 218 feet tall and holds
Fudgin [204]

Answer: The radius of the new water tower is approximately 21 ft^3

Step-by-step explanation:

  So we know the volume  of the Water Tower is 66840 ft^3   and the new one's volume will hold 3/5 as much.  so you will multiply  66840 by 3/5 to find the volume of the new one.

66840 * 3/5 = 40104   so the new water tower will hold 40104 cubic feet of water.

Now to find the radius we will use the formula  v= 4/3\pir^3

40104 =  4/3 * \pi* r^3

 40104=  4.1887* r^3

r= 21  

       

5 0
3 years ago
Given triangle DEF where ∠D = (7b +1)∘, ∠E = (2b + 1)∘, and ∠F = ( b + 8)∘. What is the measure of ∠E?
____ [38]
<h3>Answer:  35 (choice C)</h3>

=============================================

Explanation:

For any triangle, the three interior angles always add to 180.

D+E+F = 180

(7b+1) + (2b+1) + (b+8) = 180

(7b+2b+b) + (1+1+8) = 180

10b+10 = 180

10b = 180-10

10b = 170

b = 170/10

b = 17

Use this value of b to find the three angle measures

  • D = 7b+1 = 7*17+1 = 119+1 = 120
  • E = 2b+1 = 2*17+1 = 34+1 = 35 degrees
  • F = b+8 = 17+8 = 25

As a check,

D+E+F = 120+35+25 = 120+60 = 180

which helps confirm the correct answers.

3 0
3 years ago
-5x - 35= -15<br> -5x = 25<br> X =
Zigmanuir [339]
X= -5 because you divide -5x by -5 to get x alone so you have to 25/-5 which is -5
3 0
3 years ago
A watermelon seed is 0.4cm long. How far would a line of 124 watermelon seeds stretch? Write your answer in meters.
Ahat [919]
Distance stretched  = 0.4 *  124  =  49.6 cms

converting to meters we divide by 100:-

Answer is 0.496 meters
6 0
3 years ago
14. As x increases in the equation 3x – 2y = 6, the value of y
Harman [31]
B. Decreases

(Hopefully I’m right!)
8 0
2 years ago
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