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katrin2010 [14]
3 years ago
15

Expand 3 (x2 + 2x – 7)

Mathematics
1 answer:
Leno4ka [110]3 years ago
5 0
Expanding is removing the brackets:
=6x^2 + 6x - 21
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If two pounds of meat will serve 5 people, how many pounds will be needed to serve 13<br> people?
Zinaida [17]

Answer:

Step-by-step explanation:

2 pounds / 5 people

x pounds / 13 people

2/5 pounds per person so 2/5 * 13 = 26/5

5 1/5 i think

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7 0
2 years ago
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(3 - (-4) x) 2, when x = 3
katen-ka-za [31]

Answer:

30

Step-by-step explanation:

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7 0
3 years ago
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Please help me with number 28
Basile [38]
C = (a^2 + b^2)^1\2

c = (6^2 + 8^2)^1\2

c = (36 + 64)^1\2

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5 0
4 years ago
The function y=40x describes how far from home Shu Ling is as she drives from Dallas to Miami. Graph the function. Use the graph
oksano4ka [1.4K]

Answer:

You can see the graph below.

To answer the question, you need to draw a vertical line from x = 12h up, until the line meets with the line.

Once the line meets with the line, draw a horizontal line from that point, and the value where this line intersects with the y-axis will be the distance from home after 12 hours.

The graph is kinda hard to read because the line is really steep, the green line is the equation y = 40*x

the red line is a line at x = 12

The black dashed line is the horizontal line that intersects with the y-axis.

In the graph, you can see that the dashed line intersects the y-axis at around y = 475.

Then a good estimate is that the distance after 12 hours is 475 (miles).

Now, we can compare this with the direct calculation, just replace x by 12 in the given line:

y = 40*12 = 480.

So our estimation is really accurate.

6 0
3 years ago
Why do you sometimes have one multiplication sentence for an array
zvonat [6]

Answer:

i dont understand

Step-by-step explanation:

4 0
3 years ago
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