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Deffense [45]
3 years ago
7

A math class has 4 girls and 4 boys in the seventh grade and 7 girls and 3 boys in the eighth grade. The teacher randomly select

s a seventh grade and an eighth grader from the class for a competition. What is the probability that the students she selects are both girls?
Mathematics
1 answer:
lidiya [134]3 years ago
5 0

Answer:

1  1/5

Step-by-step explanation:

4 g  4 b (8)

7 g  3 b (10)

1/2 for seventh, 7/10 for eighth

Change 1/2 to 5/10 to be able to add.

7/10 + 5/10 = 12/10 --> 1  1/5

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What is the length of the arc shown in​ red?
professor190 [17]

Answer:

≈ 18.8 cm

Step-by-step explanation:

The arc length is calculated as

arc = circumference of circle × fraction of circle

The central angle is equal to the arc subtending it, that is 60°

  arc = 2πr × \frac{60}{360}

        = 2π × 18 × \frac{1}{6}

        = 36π × \frac{1}{6}

        = 6π ≈ 18.8 cm ( to 1 dec. place )

3 0
3 years ago
Need help a s a p HURRYYYYY
Dimas [21]

Step-by-step explanation:

v= 4/3πr³

4/3×314/100×8×8×8

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= 2,143.573

3 0
3 years ago
THis is kinda hard, pls help ASAP
Feliz [49]

Answer:

yep this kinda hard!!!!!!!!!!!!?!??!

7 0
3 years ago
What is the size of the picture reducing it by 1/25 original size 75 by 50
Svetradugi [14.3K]
50/1 * 1/25 = 50/25 = 2

75/1 * 1/25 = 75/25 = 3

The reduced painting is 2cm x 3cm
5 0
4 years ago
3q(p-q)+2r(p-q)-S(q-p)<br> Can u solve it step by step
Artyom0805 [142]

Answer:

-3q² + 3qp + 2rp - 2rq + Sq - Sp

Step-by-step explanation:

first part

3q(p-q) = 3qp - 3q²

second part

2r(p-q) = 2rp - 2rq

third part

S(q-p) = Sq - Sp

then we put it all together

3qp - 3q² + 2rp - 2rq + Sq - Sp

in the right place possibly

-3q² + 3qp + 2rp - 2rq + Sq - Sp

8 0
2 years ago
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