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kenny6666 [7]
3 years ago
8

In a group of students the ratio of the number of students who liked music and sport is 9:7. out of which 25 liked both the acti

vities, 20 liked music only and 15 liked none of the activities .
i)find the total number of students in group
Mathematics
1 answer:
arlik [135]3 years ago
8 0

Answer:

Hello,

Total number : 70

Step-by-step explanation:

20 + 25 = 45

45 liked music

X liked sport only

X + 25 liked sport

45 / 9 = (X + 25) / 7  ⇔ 7 x 5 = X + 25 ⇔ X = 35 - 25 ⇔ X = 10

10 liked sport only

Total students in group : 45 + 10 + 15 = 70

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3 years ago
Solve the quadratic equation: 2 + 4 = 0
dalvyx [7]

Answers is 6=0 I think.

2 + 4 = 0 \\ 6 = 0

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ABCD is a Rhombus with side length 10 cm. Angle ADC = 40. DAC is a sector of a circle with center D. BAC is a sector of a circle
Natasha_Volkova [10]

The value of the <em>shaded</em> area is approximately 34.907 square centimeters.

<h3>How to calculate the area between a rhombus and a circle</h3>

According to the description in statement we prepared a representation of the figure in the image attached below. The <em>shaded</em> area is equal to the area of the <em>circle</em> sector (A), in square centimeters:

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Where:

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7 0
2 years ago
A DVD player costs $250 and TV costs $600. With a 19% commission rate, how much
Vika [28.1K]

In this question, we're trying to find how much a sale clerk earns from a sale.

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We also know that the TV costs $600

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3 years ago
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7nadin3 [17]

Answer:

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3 years ago
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