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Leviafan [203]
3 years ago
10

A class of 30 swim team members took a lifesaving test. Eighteen of the members had an average score of 92 points. The remaining

members had an average score of 84 points.
What was the average for the entire swim team?
Mathematics
2 answers:
inysia [295]3 years ago
8 0

Answer:

88.8%

Step-by-step explanation:

1.) 30-18= 12 which is the number of member that had an average of 84

2.)Then multiply  12 times 84 = 1008

3.) You multiply 18 by 92 which equals 1656

4.)Add 1008 and 1656 together  and get 2664.

5.)Divide 2664 / 30 and you get the average of 88.8

Hope this helps :)

plz brainly & like

Fofino [41]3 years ago
6 0

Answer:

88.8%

Step-by-step explanation:

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A) A graph is drawn below.<br> Explain how you know that y is not directly proportional to x.
STatiana [176]

Step-by-step explanation:

y isn't directly proportional with x because the graph doesn't cross O the origin, it starts from a y-intercept wich is not a property for proportional portions

8 0
2 years ago
Write the sum using summation notation, assuming the suggested pattern continues. 6, -18, 54, -162, +… Is this sequence arithmet
telo118 [61]

Answer:

Hello,

This sequence is geometric with a ratio of -3

the first term is 6

Step-by-step explanation:

u_1=6\\u_2=-18=6*(-3)=u_1*(-3)\\u_3=54=-18*(-3)=u_2*(-3)=u_1*(-3)^2\\u_4=-162=u_3*(-3)=u_1*(-3)^3\\\\...\\u_{n+1}=u_1*(-3)^n\\\\\displaystyle \sum\limits^\infty _{i=1}u_i = \lim_{n \to \infty} \sum\limits^n _{i=1}u_1*(-3)^{i-1}\\=6*\lim_{n \to \infty} \sum\limits^\infty _{i=1}(-3)^{i-1}\\=6*\frac{1-(-3)^n}{1-(-3)} \\=\dfrac{3}{2} *({1-(-3)^n)\\

serie does not converge.

7 0
2 years ago
This question is confusing to me please help..
lisabon 2012 [21]

Answer:

5

Step-by-step explanation:

First off find how many bowls and vases combined

12 bowls and 8 vases therefore 20

to find 1/4 of a number divide by 4

therefore, 20/4 is 5

5 0
2 years ago
5. For each quantity, decide whether circumference or area would be needed to calculate it. Explain or show your reasoning.
kolbaska11 [484]

Answer:

a. The distance around a circular track.  CIRCUMFERENCE

b. The total number of equally-sized tiles on a circular floor. AREA

c. The amount of oil it takes to cover the bottom of a frying pan.  AREA

d. The distance your car will go with one turn of the wheels. CIRCUMFERENCE

Step-by-step explanation:

CIRCUMFERENCE : The circumference of a circle is the total length of its boundary.

AREA : Area of a circle is the total region covered buy that circle.

a. The distance around a circular track.

Here, we are covering the distance ONLY around the track and NOT inside it,

Hence, The CIRCUMFERENCE is calculated.

b. The total number of equally-sized tiles on a circular floor.

Here, we are covering the region or the total space occupied by all the tiles on the floor.

Hence, The AREA is calculated.

c. The amount of oil it takes to cover the bottom of a frying pan.

Here, we are covering the region or the total space occupied by all the oil on the bottom of the frying pan.

Hence, The AREA is calculated.

d. The distance your car will go with one turn of the wheels.

Here,  the distance covered by wheel in 1 round  

= Total length of the boundary of wheel

= The circumference of the wheel

Hence, The CIRCUMFERENCE is calculated.

8 0
3 years ago
A line is the locus of points that:
Len [333]

Answer:

Option D

Step-by-step explanation:

Option A represents the circle

Option B represents the parabola

Option C represents the ellipse

Option D represents the line

6 0
2 years ago
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