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2 years ago

Mrs. Favicchio has 72 students in her science class.

Mathematics

1 answer:

vodka [1.7K]2 years ago

5 0

She need to order 720 packs of ph paper and 360 cases of test tubes

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Round your answer to the nearest hundredth. ? с А 3 70° B

Paladinen [302]

I'd suggest getting a Texas Instruments TI-84 plus calculator or use des mos .com scientific

4 0

1 year ago

2. Are these ratios equal? 6:10 and 5:20

Step2247 [10]

Answer:

Step-by-step explanation:

Think of it like this. 6/10 is 60% and 5/20 is 25%. These two values aren't the same.

3 0

2 years ago

Read 2 more answers

An urn contains 12 balls, of which 4 are white.

wel

Answer:

a) $\frac{1}{3}$

b) $\frac{4}{12}\,,\,\frac{4}{11}\,,\,\frac{4}{10}\,,...$

Step-by-step explanation:

Number of balls in the urn = 12

Number of white balls in the urn = 4

So, number of balls which are not white = 12 - 4 = 8

We know that probability = No. of outcomes/Total number of outcomes

Let $A_i\,,\,B_i\,,\,C_i$ denotes the event of getting white ball by A, B and C

a) each ball is replaced after being drawn.

Probability = Number of white balls/Total number of balls

Solution: $P(A_i)=P(B_i)=P(C_i)=\frac{4}{12}=\frac{1}{3}$

b)the balls that are withdrawn are not replaced.

Solution:

If A wins: $P(A_1)=\frac{4}{12}=\frac{1}{3}$

If A lost and B wins: $P\left ( B_1|A_1^{c} \right )=\frac{4}{11}$

If A and B lost and C wins: $P\left ( C_1|A_1^{c}\,B_1^{c} \right )=\frac{4}{10}$

and so on....

4 0

2 years ago

The work of a student trying to solve the equation 3(4x − 2) = 9 + 2x + 5 is shown below:

galina1969 [7]

Step 1 gives you
3*(4x - 2) on the left hand side.

When you remove the brackets what you get is
3*4x - 3*2
12 x - 6 You have to distribute on both sides of the plus sign. The answer is the second one down.

So the answer is 2) <<<< answer.

8 0

2 years ago

Read 2 more answers

A quadrilateral can be partitioned into two triangles. What is the sum of the angles of a quadrilateral?

Dimas [21]

Answer:

360°

Step-by-step explanation:

Each of the two triangles have 3 angles that add up to 180°.

So,

180° + 180° = 360°

The sum of the angles of a quadrilateral is 360°

8 0

1 year ago