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3 years ago

3a + 2=11... need help urgently.

Mathematics

2 answers:

nlexa [21]3 years ago

7 0

Answer:

answer is a=3

Step-by-step explanation:

Maksim231197 [3]3 years ago

4 0

Answer:

a=3

Step-by-step explanation:

3a+2=11

-2

3a=9/3

a=3

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What was the original price if they is a 10% discount and the sale price is 76.50

fomenos

if the price is 76.50 now then it was 84.15

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4 years ago

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A bag contain 3 black balls and 2 white balls.

Troyanec [42]

Answer:

Step-by-step explanation:

Total number of balls = 3 + 2 = 5

$Probability \ of \ taking \ 2 \ black \ ball \ with \ replacement\\\\ = \frac{3C_1}{5C_1} \times \frac{3C_1}{5C_1} =\frac{3}{5} \times \frac{3}{5} = \frac{9}{25}\\\\$

$Probability \ of \ one \ black \ and \ one\ white \ with \ replacement \\\\= \frac{3C_1}{5C_1} \times \frac{2C_1}{5C_1} = \frac{3}{5} \times \frac{2}{5} = \frac{6}{25}$

Probability of at least one black( means BB or BW or WB)

$=\frac{3}{5} \times \frac{3}{5} + \frac{3}{5} \times \frac{2}{5} + \frac{2}{5} \times \frac{3}{5} \\\\= \frac{9}{25} + \frac{6}{25} + \frac{6}{25}\\\\= \frac{21}{25}$

Probability of at most one black ( means WW or WB or BW)

$=\frac{2}{5} \times \frac{2}{5} + \frac{3}{5} \times \frac{2}{5} \times \frac{2}{5} + \frac{3}{5}\\\\= \frac{4}{25} + \frac{6}{25} + \frac{6}{25}\\\\=\frac{16}{25}$

a) Probability both black without replacement

$=\frac{3}{5} \times \frac{2}{4}\\\\=\frac{6}{20}\\\\=\frac{3}{10}$

b) Probability of one black and one white

$=\frac{3}{5} \times \frac{2}{4}\\\\=\frac{6}{20}\\\\=\frac{3}{10}$

c) Probability of at least one black ( BB or BW or WB)

$=\frac{3}{5} \times \frac{2}{4} + \frac{3}{5} \times \frac{2}{4} + \frac{2}{5} \times \frac{3}{4}\\\\=\frac{6}{20} + \frac{6}{20} + \frac{6}{20} \\\\=\frac{18}{20} \\\\=\frac{9}{10}$

d) Probability of at most one black ( BW or WW or WB)

$=\frac{3}{5} \times \frac{2}{4} + \frac{2}{5} \times \frac{1}{4} + \frac{2}{5} \times \frac{3}{4}\\\\=\frac{6}{20} + \frac{2}{20} + \frac{6}{20} \\\\=\frac{14}{20}\\\\=\frac{7}{10}$

6 0

3 years ago

PLEASE HELP WILL MARK BRAINLIEST!!!!!!!!

Alexeev081 [22]

Help me somebody plz

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3 years ago

Read 2 more answers

First, rewrite 9/10 and 23/25 so that they have a common denominator.

alekssr [168]

Multiply the numerator and denominator of 23/25 by 10 and do the same on 9/10 but multiply by 25. Your denominator will be 250. You can figure the rest out.

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True or false question

QveST [7]

THe scale factor = 5/2 = 2.5

So the first statement is false
and the second statement is True

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4 years ago

3a + 2=11... need help urgently. ​

3a + 2=11... need help urgently.