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MAVERICK [17]
3 years ago
13

Which ordered pair is the solution to the system of equations?

Mathematics
1 answer:
prisoha [69]3 years ago
3 0

Answer:

(3, -3)

Step-by-step explanation:

{у = 3х - 12

{4х + 6у = −6

4x + 6[3x - 12] = −6

4x + 18x - 72 = −6

−6 = −72 + 22x

+72 + 72

___________

66 = 22x

__ ___

22 22

3 = x [Plug this back into both equations above to get the y-coordinate of −3]; -3 = y

I am joyous to assist you anytime.

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The sum of a number and -2 is -9 . what is the number
adell [148]

Answer:

x=-7

Step-by-step explanation:

Translate into an equation.

“A number” + -2 = -9

Assign “a number” to be “x”

X+-2=-9

Add 2 on both sides to even it out and get x

X-2+2=-9+2

X=-7

The number is -7. :)

4 0
2 years ago
Read 2 more answers
The length of a rectangle is 8cm less than twice it's width find the the dimensions of the rectangle if the area is 120cm(2)
Anton [14]

Answer:

15 cm

Step-by-step explanation:

so:

if A= b x h and web have b Just Do the inverse formula:

H = a/b h=120/8 = 15 cm

Sorry for my bad English but I'm italian

5 0
3 years ago
Explain how place value could be used to find the difference of 4.23 and 2.75
seropon [69]
You can use place value to align the numbers together so you can subtract correctly. Match the ones, tenths, and hundredths digits together to subtract.

4.23
2.75

then you can subtract correctly without any mistakes in place value
6 0
3 years ago
How to round 0.125 to the nearest whole
Gwar [14]
In the number 0.125, there is:
0 in the ones place,
1 in the tenths place,
2 in the hundredths place, and
5 in the thousandths place.

We want to round to the hundredths place, which is 2.
To do this we must look to the next digit.
If it's less than 5, we round down.
If it's more than 5, we round up.

The next digit is 5, though! So what do we do then?
Well, we would look to the next digit again<span> and decide from that.</span>
There isn't really a next digit to decide from, though, is there?

<span>In that case, we just round up.

and we get  0.13</span>
8 0
3 years ago
Pam's age plus Tom's age is 65. Twice Pam's age is equal to 130 minus twice Tom's age. How old are they?
GalinKa [24]
Pam = 40
Tom = 25

40 (Pam) x 2 = 80
25 (Tom) x 2 = 50
130 - 50 (Tomx2) = 80
Pam (40) + Tom (25) = 65
3 0
4 years ago
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