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3 years ago

P is the product of 7 to the sum of 3 and 9

Mathematics

1 answer:

Colt1911 [192]3 years ago

5 0

The equation: P×7+3+9

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What fraction is 2kg over 275g

irina1246 [14]

2kg=2000g so do 275/2000 and cancel down to 11/80 :)

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3 years ago

There are 10 marbles in a bag. Four are blue, 3 are black and 2 white and 1 red. If the marbles are not replaced once they are d

stich3 [128]

Given:

Given that there are 10 marbles in a bag. 4 are blue, 3 are black, 2 are white and 1 is red.

The marbles are selected by not replacing the drawn ones.

We need to the probability of selected a black marble and then a white marble without replacement.

Probability:

Let B denote the black marble.

Let W denote the white marble.

The probability of selecting a black marble is $P(B)=\frac{3}{10}$

The probability of selecting a white marble without replacement is $P(W)=\frac{2}{9}$

The probability of selecting a black marble and then a white marble without replacement is given by

$P(B \ and \ W)=P(B) \cdot P(W)$

Substituting the values, we get;

$P(B \ and \ W)=\frac{3}{10} \cdot \frac{2}{9}$

$P(B \ and \ W)=\frac{6}{90}$

$P(B \ and \ W)=\frac{1}{15}$

Thus, the probability of selecting a black marble and then a white marble without replacement is $\frac{1}{15}$

4 0

3 years ago

What's 20 + (-6 x 4) - 2 ?

Zepler [3.9K]

Answer:

-6

Step-by-step explanation:

First multiply -6 and 4 which is -24.

Then add 20 and -24 which is -4

Then subtract -4 and -2

Which is -6.

3 0

3 years ago

Read 2 more answers

△ABC∼△DEF , △ABC has a height of 20 inches, and △DEF has a height of 24 inches. What is the ratio of the area of △ABC to the are

ZanzabumX [31]

Let
b1-------------> base △ABC
b2-------------> base △DEF
A1-----------> area △ABC
A2-----------> area △DEF

we know that
h1=20 in
h2=24 in
A1=b1*20/2-------------> A1=10b1
A2=b2*24/2 ------------> A2=12 b2

if △ABC∼△DEF
then
b1/20=b2/24------------> b1=b2*[20/24]-----> b1=b2*[5/6]

What is the ratio of the area of △ABC to the area of △DEF?
A1=10b1
A2=12b2
A1/A2=(10/12)*(b1/b2)-------> (10/12)*(b2*(5/6)/b2)-----> (10/12)*(5/6)=50/72

A1/A2=50/72--------> 25/36

the answer is (25/36)

8 0

3 years ago

Two supplementary angles differ by 48°. find the angles.

OleMash [197]

this will need 2 equations, x+y=180 and x-48=y, this will make the answer be 114 and 66.

4 0

3 years ago