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kow [346]
3 years ago
8

In a class of 60 students in an online test, where girls are twice the number of boys, mellisa ranked 27th from the top. If ther

e are 9 boys ahead of mellisa, how many girls are after there rank?
Mathematics
1 answer:
timofeeve [1]3 years ago
3 0

Answer:

17

Step-by-step explanation:

60 students in total, that means girls are 40 in number and boys are 20 in number (because girls are twice the number of boys).

If girls are 40 in total

Boys are 20

With 9 boys ahead of melissa, that means ( we will use 26 because she is in 27th)

26-9 = 17

This means 17 girls are ahead of melissa.

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Thought about it and theres a couple of others but i'm going to say 424-334
7 0
3 years ago
A rectangular vegetable patch has an area of 56 square meters and a
vredina [299]

Answer:

The dimensions of the vegetable patch is 8 m by 7 m.

Step-by-step explanation:

Area of a vegetable patch is 56 square meters and the perimeter is 30 m.

If l is length and b is breadth, then area and perimeter of a rectangle is given by :

A=l\times b

P=2(l+b)

Substituting the values in the above formulas as :

l\times b=56\ ....(1)

and

2(l+b)=30\\\\l+b=15\ .....(2)

We need to solve equation (1) and (2) to find the values of l and b such that :

Equation (2), l = 15 - b

Equation (1) becomes,

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If b = 7 m, so, l = 8 m

If b = 8 m, l = 7 m

So, the dimensions of the vegetable patch is 8 m by 7 m.

4 0
3 years ago
P, Q & R form a right-angled triangle.
Naya [18.7K]

Answer:

m<RPQ = 22°

Step-by-step explanation:

Given:

m<SRQ = 90°

PS = PQ

m<SQR = 46°

Required:

m<RPQ

Solution:

m<SQR + m<SRQ + m<RSQ = 180°

Substitute

46° + 90° + m<RSQ = 180°

m<RSQ = 180° - 136°

m<RSQ = 44°

Find m<PSQ:

m<PSQ = 180° - m<RSQ (Angles on a straight line

m<PSQ = 180° - 44° (Substitution)

m<PSQ = 136°

Find m<RPQ:

∆QSP is an isosceles triangle with two equal base angles. Therefore:

m<RPQ = ½(180° - 136°)

m<RPQ = 22°

4 0
3 years ago
The diameter of a basketball is 245 cm. What is the circumference?​
maks197457 [2]

Answer: 769.3

Step-by-step explanation:

C=2\pi r\\

C=2*3.14*122.5

245/2=122.5

C=769.3

5 0
4 years ago
the wireless cafe charges $5.40 for 45 minutes of internet access. how much money doe the wireless cafe charge per minute
ki77a [65]
5.40 divided by 45 = 0.12

The cafe charges 12 cents per minute.
8 0
4 years ago
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