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just olya [345]
3 years ago
11

Two easy seventh grade problems, please help !

Mathematics
1 answer:
N76 [4]3 years ago
4 0

Answer: Step-by-step explanation:

#1.         +4.9       +4.9

             m/2.8 = _____

              *2.8       *2.8           Multiply both by 2.8

   Calculate the answer this is your work after all!!!                

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The probability is 1% that an electrical connector that is kept dry fails during the warranty period of a portable computer. If
rodikova [14]

Answer:

1.4% of connectors fail during the warranty period.

Step-by-step explanation:

We have these following probabilities:

A 90% probability that a connector is kept dry.

A 10% probability that a connectors is wet.

If a connector is dry, an 1% probability of failling.

If a connector is wet, a 5% probability of failling.

What proportion of connectors fail during the warranty period?

This is 1% of 90% and 5% of 10%. So

P = 0.01*0.9 + 0.05*0.1 = 0.014

1.4% of connectors fail during the warranty period.

4 0
3 years ago
Each month Allison gets a $15 allowance and earns $100 working at the theater. She uses the expression 15x+100y to keep track of
Marizza181 [45]

Step-by-step explanation:

The expression for he earning of Allison and her allowance is as follows :

15x+100y

Part A

Variables are x and y. Coefficients are 15 and 100.

Part (B)

There are two terms in this expression. + is used to separate the terms. 15x and 100y are the terms.

Part (C) As $15 shows her earning from allowances. Hence, 15x shows allowance.

3 0
4 years ago
Which of the following statistics measures the variability of a distribution?
oksian1 [2.3K]
The answer to your question is C
8 0
4 years ago
Since 1965, U.S. quarters have been made
Irina18 [472]
The answer is 29.4 grams.
How to solve:

1. Convert $15 to quarters. You can do this by multiplying 15 by 4. You use 4 because 4 quarters equal to $1. This will equal to 60 quarters.

2. Multiply both 5.76 and 6.25 by 60 to find the weight of $15 in quarters for today and before 1965.
Today: 5.76 g x 60 = 345.6 grams
Before 1965: 6.25 g x 60 = 375 grams

3. Now that you have the weight of quarters for both time periods, subtract! 375 grams - 345.6 grams = 29.4 grams
6 0
3 years ago
Is PA congruent to PC
julia-pushkina [17]

Answer: Yes. They are congruent.

7 0
3 years ago
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