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anyanavicka [17]
3 years ago
10

12• (-9) pls help and explain to mr

Mathematics
1 answer:
Paha777 [63]3 years ago
3 0
12*-9 is simply 12 * 9 with a negative at the end. I use a strategy as I'm in 8th grade that I learned in 5th this should help. If you love to hat that is bad. this is for division and multiplication this is stating that if a positive( love ) number times or divided by a negative( hate ) number it is negative( bad ). so 12*9=108 and add the negative and your answer is -108
Hope this helps:) good luck!
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please help!!! the study conducted was 6 days long: there was 72mm of plant food and it decreased an equal amount each day.
Anuta_ua [19.1K]

Answer:

f(x) = 72 - 12x

Step-by-step explanation:

No. of days of study = 6

Amount of food to use for the 6 days = 72 mm

Given that equal amount of food was used each day, amount used per day = \frac{72}{6} = 12 mm

This would enable us derive a function for the amount of food remaining f(x), which can be expressed as a function of the number of days that have passed, (x).

Thus, we would have:

f(x) = 72 - 12x

Let's check if this equation expresses the relation of the function well.

At the end of day 1, if we used, 12mm, we would have 72 - 12 = 60mm of food remaining.

If we replace x in the equation we derived, we would get the same 60mm as the amount of food remaining.

If you try 2, 3, 4, 5 days, you'd get same thing.

At the end of the study, after the 6th day, the food would remain nothing.

Replace 6 for x in the relation function derived, you'd get a value of 0.

6 0
3 years ago
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6 0
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The difference of a number divided by 7 and 9 is equal to 2. use the variable C what the unknown
bogdanovich [222]
Given that the number is C.
The number divided by 7 is C/7
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C - 63 = 14
C = 14 + 63 = 77
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48 wooden pre-sharpened pencils cost $1.88. How much does EACH pencil cost?
Lady bird [3.3K]

Answer:

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Find the sum.<br> (5p+11) + (8p- 4)<br> A. 5p+7<br> B. 13p-7<br> C. 13p+7<br> D. 13p+15<br> AP3X
USPshnik [31]

Answer:

(5p + 11) + (8p - 4) \\ = ( 13p + 7)

<h2>C. (13p+7) is the right answer.</h2>
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