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2 years ago

9

What number should be added to 51 to get a sum -21

2 answers:

elena55 [62]2 years ago

6 0

51 + -72 = -21
Adding a negative seventy-two to fifty-one will give you a sum of negative twenty-one

Anastaziya [24]2 years ago

3 0

We can write out a formula in order to solve this. Since sum represents addition, if x represents the unknown number, we can write the formula: x+51=-21. Then, to solve for x, you would subtract 51 from both sides to get x=-72 which is the final answer.

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The number of students in a school increased by 25%between last year and this year. Last year there were 250 students in the sch

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2 years ago

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77julia77 [94]

Answer:

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2 years ago

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Sedaia [141]

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6 0

2 years ago

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WARRIOR [948]

Answer:

The correct option is C). When it was purchased, the coin was worth $6

Step-by-step explanation:

Given function is f(t)= $6\times2^{t}$

Where t is number of years and f(t) is function showing the value of a rare coin.

A figure of f(t) shows that the graph has time t on the x-axis and f(t) on the y-axis.

Also y-intercept at (0,6)

hence, when time t was zero, the value of a rare coin is 6$

f(t)= $6\times2^{t}$

f(0)= $6\times2^{0}$

<em>f(0)=6</em>

Thus,

The correct option is C). When it was purchased, the coin was worth $6

6 0

2 years ago