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3 years ago

PLEASE HELP I HAVE 15 MINUTES LEFT HELP HELP PLEASE

Mathematics

2 answers:

tiny-mole [99]3 years ago

8 0

Answers are on the picture

melamori03 [73]3 years ago

3 0

Answer:

I'm sorry for answering late I just saw this but

Step-by-step explanation:

1. is 34

2. is 12

3. I really dont understand that one

But try your best and multiply and division always come first before u add and subtract

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A bag contains 10 black, 15 white, and 25 blue marbles. What is the probability of randomly selecting one

gulaghasi [49]

Answer: 0.8 or 80%

Step-by-step explanation:

First find the total number of marbles:

10 + 15 + 25 = 50 marbles total

To find the number of marbles that are not black:

15 + 25 = 40 marbles that are not black

Set up ratio:

$\frac{40}{50}$ = 0.8 or 80%

4 0

3 years ago

Write a linear equation based on given information. Through (5,-5) and (4,0)

Katena32 [7]

For this case we have that by definition, the equation of the line of the slope-intersection form is given by:

$y = mx + b$

Where:

m: It is the slope of the line

b: It is the cut point with the y axis

We have the following points:

$(x_ {1}, y_ {1}) :( 5, -5)\\(x_ {2}, y_ {2}) :( 4,0)$

We find the slope:

$m = \frac {y_ {2} -y_ {1}} {x_ {2} -x_ {1}} = \frac {0 - (- 5)} {4-5} = \frac {5} {- 1} = - 5$

Thus, the equation is of the form:

$y = -5x + b$

We substitute a point and find b:

$0 = -5 (4) + b\\0 = -20 + b\\b = 20$

Finally, the equation is:

$y = -5x + 20$

Answer:

$y = -5x + 20$

6 0

3 years ago

Breanna wrote a number that is 4 units from 0 on the number line.

Hatshy [7]

The two answers are -4 and 4, because 0-4 is -4 and 0+4 is 4. Hope this helps

5 0

3 years ago

A jar contains some bacteria. Every day the number of bacteria

svp [43]

Answer:

Day 2

Step-by-step explanation:

Every 20 days, one jar is full.

To find when it was 1/8 full, we multiply the 20 days by 1/8.

20 x 1/8 = 2

Day 2

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2 years ago

You bought a blu-ray that cost $28.68 before tax. How much did you have to pay once the 7% sales tax was factored in?

xxTIMURxx [149]

Answer:

You had to pay $30.69 after the sales tax factored in.

Step-by-step explanation:

First step is to find 7% of $28.68.

The answer to that is the sales tax, therefore making the sales tax $2.01.

Finally, you have to add $2.01 to $28.68 to get a total of $30.69, your final answer.

8 0

3 years ago