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Karo-lina-s [1.5K]
3 years ago
10

6x + y = -39 3x + 2y = -15 elimination using multiplication

Mathematics
1 answer:
vlabodo [156]3 years ago
5 0
Multiply the second equation by 2 so that its 
6x+4y=-30
then subtract 
6x+y=-39
6x+4y=-30
= -3y=-69
divide by -3 to isolate the y
then you get y=23
substitute the y value back into one of the equations to solve for x.
6x+23=-31
solve like you always do and you'll get your x
Congratulations, you solved a problem.

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3(3b +2)=-30 what is b =
ycow [4]
3(3b+2)=-30  perform indicated multiplication on left side...

9b+6=-30  subtract 6 from both sides

9b=-36  divide both sides by 9

b=-4
4 0
3 years ago
If f(x)=4^x, find f(4)
lina2011 [118]

Answer:

\huge\boxed{f(4) = 256}

Step-by-step explanation:

<u>Given function is:</u>

f(x) = 4^x

Put x = 4

So,

f(4) = 4^4\\\\f(4) = 256\\\\\rule[225]{225}{2}

Hope this helped!

<h3>~AH1807</h3>
6 0
3 years ago
Which function is described by values in the table?
Sveta_85 [38]

One way to approach this problem is to go ahead and find the actual equation in slope-intercept form.


The slope of the line thru (3,6) and (5,4) is m = (6-4) / (3-5), or -2/2, or -1.

Subbing the known values of m, x and y, we get:

4 = -(5) + b. Then b = 9.

The correct equation (representing the data values in the table) is y = -x + 9.


7 0
4 years ago
The graph of a function is shown on the coordinate plane below. Identify the rate of change of the function.
soldi70 [24.7K]

Answer:

it's 2

Step-by-step explanation:

3 0
3 years ago
A tropical species of mite named Archegozetes longisetosus is the record holder for the strongest insect in the world. It can li
taurus [48]

We are given that the insect can lift 1.182 x 10^3 times it's own weight. Say that w is weight, so the lift is:

lift = 1.182 x 10^3 * w

 

Assuming that your body weight is 60 kg, therefore you can lift:

lift = 1.182 x 10^3 * 60 kg = 70,920 kg

8 0
3 years ago
Read 2 more answers
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