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AveGali [126]
3 years ago
15

I need a fast answer !! A bag has 7 blue marbles and 3 red marbles. What is the probability of drawing two red marbles, if the f

irst marble is replaced after it is drawn? A. 1/7 B. 1/3 C. 3/10 D. 9/100
Mathematics
1 answer:
Alex787 [66]3 years ago
8 0

Answer:

Step-by-step explanation:

9/100 i believe as you would multiply 3/10 by 3/10 due to the fact the marble is being replaced so the probability of getting a red marble the second time will be more unlikely. If I'm right please thank me or give me brainly. Hope this helps :)

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Subtract (7x - 10)-(-6x - 8).
puteri [66]

(7x-10) - (-6x-8)

distribute the negative to the (-6x-8)

(7x-10) + 6x+8

disregard the parenthesis because addition is associative

7x-10 + 6x+8

combine like terms

13x-2

13x-2 is the answer


5 0
3 years ago
If the measure of a triangle are in the ratio 2:5:5. What is the measure of the angle
Sphinxa [80]
Your answer is 75°, 75°, and 30°
Because you know that angles in a triangle equal 180°, you can find what 1 in terms of the ratio is by adding 2, 5, and 5, and then dividing 180 by that value. 2 + 5 + 5 = 12, so 180 ÷ 12 = 15.
Now that you know that 1 in terms of the ratio is 15, you can multiply 15 by the ratio values, so
15 × 2 = 30°
15 × 5 = 75°
15 × 5 = 75°

I hope this helps!
5 0
3 years ago
In a classroom 12 students are wearing glasses, while 6 are not. What percent of the students are wearing glasses? Explainnn
ASHA 777 [7]

Answer:

66,666666666666666666666666666666666667% :))

Step-by-step explanation:

total number of students in 1 class: 12 + 6 = 18 students

percentage of student wearing glasses are:

\frac{12}{18}  \times 100 = 66.666666667\%

Done :))

4 0
3 years ago
Company 1 charges $12 per foot of fence. <br> Find the cost if Company 1 completes the job.
natta225 [31]

Step-by-step explanation:

how many feet of fence is he doing

5 0
3 years ago
a philanthropist deposits 2,000$, in a trust fund that pays 6.0%interest , compunded continuously. The balance given to the coll
maw [93]

Answer:

$6414

Step-by-step explanation:

Step one

given

Principal=$2,000

rate= 6%= 0.06

Time= 20 years

Required

The final amount

Step two:

The compound interest formula is

A= P(1+r)^t

substituting we have

A=2000(1+0.06)^2^0\\\\ A= 2000(1.06)^2^0\\\\ A=2000*3.207\\\\A=6414

The amount given to the college is $6414

7 0
3 years ago
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