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Darina [25.2K]
2 years ago
13

Subtract -7x-9 from -4x^2+3x-5

Mathematics
1 answer:
Troyanec [42]2 years ago
3 0
The Answer is -4x^2+10x+4

-4x^2 is not effected, as it has no like terms.

3x-(-7x) is equivalent to 3x+7x which equals 10x.

-5-(-9) is equivalent to -5+9 which equals 4.
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Ratio equivalents to 1:2
nata0808 [166]
2:4  3:6  4:8

Any ratio equals 1:2 as long as you can divide the first number by itself to get 1 and the second number with the 1st number.
Example
2:4
Divide the first number by 2 and you get 1 
Divide the second number by 2 and you get 2
So the ratio equals 1:2


Please make me brainliest
3 0
3 years ago
Read 2 more answers
9. YOU BE THE TEACHER Your friend
Crank

Answer:

Step-by-step explanation:

Yes, it's reasonable.

What you are doing is solving the question by rounding. You come up with an answer. Suppose you loose the decimal somewhere and you get 0.36? Is that reasonable? Do you just write the answer in the provided blank and move on. What now?

You get it wrong?!!

But your estimate should be about 9/3 = 3. Now you look at your calculator with great misgivings, because it made a mistake. Did it or did you? Well ultimately you did, but you have to blame something. So the calculator takes the heat.

Who  knows? Maybe the decimal doesn't work. It's stuck or something. In any event you should be aware that there's no way the answer could be 0.36 when you estimate it to be 3.

8 0
3 years ago
30,200 died in car accidents per year. How many deaths per day
swat32
I thnk 83 if the year has 365 days

4 0
4 years ago
HELP for (ii)…..how do we find a?
Mariana [72]

By using the information given on the graph, we can see that a = 3.

<h3>How to find the value of a?</h3>

Here we have an exponential of the form:

y = p*a^x

And by looking at the graph, it passes through (0, 4) and (2, 36), so we can write:

4 = p*a^0\\\\36 = p*a^2

From the first equation we get that p = 4, replacing that on the second one we get:

36 = 4*a^2\\\\36/4 = 9 = a^2\\\\\sqrt{9} = 3 = a

So we conclude that a = 3.

If you want to learn more about exponential equations:

brainly.com/question/11832081

#SPJ1

7 0
3 years ago
Variable y varies directly with variable x, and y = 6 when x = 20.
-BARSIC- [3]
In a direct proportion, the equation can be set up as
y = kx
k = y/x
k = 6/20
k = 0.3
7 0
3 years ago
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