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Phoenix [80]
3 years ago
7

8x-9y=19 4x+y=-7 How Do I Do This Type Of Math

Mathematics
1 answer:
astraxan [27]3 years ago
4 0
8x-9y=19
4x+y=-7
 Multiply all terms of the 2nd by (9)===>  36x + 9y= 63

add (36x  9y=  63) to the 1st ===> 44x+0y = -44 ===> x=-1
replace x by this value in any of the equation & you'll get y=-3
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Name a number that can be evenly divided by 6 and and by 7
Alona [7]

There are an infinite number of them.  The smallest one is 42,
and every multiple of 42 is another one.

I don't remember the official correct way to solve this problem. 
I can only show you my own way of doing it.

I take the bigger number, and I go through its multiples, one by one,
until I spot one that's also a multiple of the smaller one.

Example:  6 and 7.
Go through the multiples of 7:

7 ... no, not a multiple of 6
14 ... no, not a multiple of 6
21 ... no, not a multiple of 6
28 ... no, not a multiple of 6
35 ... no, not a multiple of 6
<em><u>42</u></em> ... Yes !  A multiple of 6.  yay !


7 0
3 years ago
The cost of a car rental is ​$37 per day plus 20 cents per mile. You are on a daily budget of ​$95. Write and solve an inequalit
juin [17]

Answer:

0.2m+37≤95

Step-by-step explanation:

I don't understand the last part of the question, but I do know the inequality if that helps. in the inequality 0.2m+37≤ 95, m is the variable that represents the miles driven.

5 0
3 years ago
Please I need help I been stuck on this problem for 40 minutes
nignag [31]
First
224-108=116miles left
And 4 days left
116/4
=29 miles each day
5 0
3 years ago
Read 2 more answers
WILL GIVE BRAINLIEST!
expeople1 [14]

Answer:

Average\:Rate\:Change=-59.4

Step-by-step explanation:

The given function is f(x)=120(0.1)^x.


We want to find the average rate of change of this function from x=0 to x=2.


This is given by:

Average\:Rate\:Change=\frac{f(2)-f(0)}{2-0}


This implies that;


Average\:Rate\:Change=\frac{120(0.1)^2-120(0.1)^0}{2-0}


Average\:Rate\:Change=\frac{120(0.1)^2-120}{2}


Average\:Rate\:Change=\frac{120((0.1)^2-1)}{2}


Average\:Rate\:Change=\frac{60(0.01-1)}{1}


Average\:Rate\:Change=60(-0.99)


Average\:Rate\:Change=-59.4

5 0
3 years ago
One number is 9 more than 3 times another. If their difference is 29, what is the larger number?
vfiekz [6]

Answer:

39

Step-by-step explanation:

x-3y=9

x-y=29

subtract

-2y=-20

y=10

x-10=29

x=39

6 0
3 years ago
Read 2 more answers
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