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3 years ago

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

ects a seventh grader and an eighth grader from the class for a competition. What is the probability that the students she selects are both boys?

1 answer:

Gala2k [10]3 years ago

3 0

Answer:

I think it is a

Step-by-step explanation:

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Ayudaaaa por favor es urgente

ss7ja [257]

Answer:

use trig

Step-by-step explanation:

sin(15) = 100/x

x = 100/sin(15)

use calculator

8 0

3 years ago

Solve each equation by factoring.

nevsk [136]

Answer:

k=1/3; k=-2/5

Step-by-step explanation:

$15k^2+k-4=-2\\15k^2+k-2=0\\(3k-1)(5k+2)=0\\3k-1=0; 5k+2=0\\k=1/3; k=-2/5$

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3 years ago

You can make small 20 small frames in 4 days or 21 large frames in 3 days. A customer has just place a order with you for 40 sma

cupoosta [38]

Answer:

I got 17.

Step-by-step explanation:

Because it takes 4 days to make 20 small frames, it takes 8 days to make 40. And because it takes 3 days to make 21 frames, and 21 multiplied by 3 is 63 (one less than 64), it would take 9 days (3 times the amount for 21) to make 64 large frames. In all, it would take APPROXIMATELY 17 days (9 +8 is 17)

6 0

3 years ago

Equation- s=db-6, solve for d

Liono4ka [1.6K]

Answer:

$d \: = \frac{s + 6}{b}$

Step-by-step explanation:

$s = db - 6$

Isolate d

$s + 6 = db$

.

Divide both sides of the equation by b

$\frac{s + 6}{b} = \frac{db}{b}$

Simplify

$\frac{s + 6}{b} = d \\ d = \frac{s + 6}{b}$

4 0

3 years ago

Read 2 more answers

?Together, teammates Pedro and Ricky got 2685 base hits last season. Pedro had 277 more hits than Ricky. How many hits did each

irga5000 [103]

Answer: Ricky: 1204, Pedro: 1481

Step-by-step explanation:

If Pedro hit 277 more base hits that Ricky, and together they hit 2685, then

2685=2x+277

2x=2408

x=1204

so Ricky hit 1204 base hits and Pedro hit 1481.

check: 1204+1481=2685

8 0

3 years ago