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tino4ka555 [31]
3 years ago
15

a random sample of seventh graders shows the numbers of minutes they spend on personal hygiene each morning

Mathematics
2 answers:
Gre4nikov [31]3 years ago
5 0

Answer:

Step-by-step explanation:

u expect us to know the questions

IRINA_888 [86]3 years ago
3 0

Can you post the rest of the question

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Evaluate the expression,<br> if x = 9, y = 14, and z = 6.<br> x• y - z^2
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The answer is 90. Hope this helps
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2 years ago
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Water tank is being filled with water. Before water is pumped in, the water level in the tank is 12 inches high. After 20 minute
zhenek [66]

Answer:

D. H = 2.1t + 12

Step-by-step explanation:

Let us assume the t be the time in minutes

And h be the water level

Now before reaching to the equation that need to be used

before this, determine the inches per minute i.e.  

= 54 inches - 12 inches

= 42 inches in 20 minutes.

Now for per minute, it would be

= 42 inches ÷ 20 minutes

= 2.1 inches per minute

After this, multiply the inches per minute with the minutes t and add the sale to the beginning value i.e. 12

So the equation is

H = 2.1t + 12

hence, the last option is correct

7 0
3 years ago
which of the following numbers, -2/3, 0, 1/2, pie, 11/15, 25, 12, -5, 0.75, -1.82828282828282828282 are rational, irrational, wh
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Answer:

Step-by-step explanation

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3 years ago
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Three times a larger number is 30 more than 5 times a smaller number. The sum of the larger number and 5 times the smaller numbe
slava [35]
3y  = 5x + 30

y + 5x = 50 .......(1)

3y - 5x = 30 .....(2)        - rearranging the first equation.

Add (1) and (2):-

4y = 80

y = 20  
Now plug y = 20 into equation (1):-
20 + 5x = 50
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3 years ago
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Last year Andrea's annual salary was A dollars and she was paid biweekly. This year she received a
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Biweekly salary last year algebraically will be S = (27)A.  Semimonthly salary this year algebraically will be S = ( A + R )6.

<h3>What is an expression?</h3>

Expression in maths is defined as the collection of the numbers variables and functions by using signs like addition, subtraction, multiplication, and division.

Numbers (constants), variables, operations, functions, brackets, punctuation, and grouping can all be represented by mathematical symbols, which can also be used to indicate the logical syntax's order of operations and other features.

Given that Last year, Andrea's annual salary was A dollar and she was paid biweekly. This year she received a raise of R dollars per year. She is now paid semimonthly.

Biweekly salary last year algebraically will be:-

S = (27)A.

Semimonthly salary this year algebraically will be:-

S = ( A + R )6.

Therefore, the biweekly salary last year algebraically will be S = (27)A.  Semimonthly salary this year algebraically will be S = ( A + R )6.

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