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storchak [24]
2 years ago
13

GET 5 STARS, THANKS, AND BRAILIEST!!!

Mathematics
1 answer:
Scrat [10]2 years ago
5 0

Answer:

its (7,6)

Step-by-step explanation:

2x + y = 20

2(7) + 6 = 20

14 + 6 = 20

20 = 20

6x - 5y = 12

6(7) - 5(6) = 12

42 - 30 = 12

12 = 12

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the amount of snowfall in jan was 2 3/4 feet. the amount of snowfall in february was 1 2/3 feet. how much snow fall was there in
Mkey [24]

Answer this is an example 4 you

To do this problem, you need to change the way the fractions are displayed so that you can simplify them.

The first step is to change them to improper fractions: fractions like 4/3 that represent more than 100% (parts adding to more than one whole).

For example, to change the first fraction in this way, multiply the number in front (2) by the bottom number:

2 * 3 = 6

This means the 2 can also represent 6 / 3. Remember that 1 equals 3/3 so 2 equals 6/3. Now add this to the 1/3 you started with, and you end up with 7/3.

Do the same for the other fraction.

Now that you have both fractions written in this way, you can multiply each by the other's denominator to arrive at their LCD (least common denominator). It won't always be least, but you can always simplify further. In this case, the numbers are small enough that it likely won't matter.

You will end up with a fraction of halves: some number x, over 2, meaning x number of halves.

Your other fraction is 7/3. So the common denominator is the bottom numbers multiplied together: 2 * 3 = 6.

To change 7/3 to a fraction of sixths, you multiply the whole thing by two. This gets the bottom number to be six.

7 * 2 = 14

3 * 2 = 6

So this fraction can also be written as 14/6. Once again, do the same to the other fraction (but multiply by 3, to get the other fraction into sixths also, since it is currently halves).

Now you have two fractions that are both in parts of six. A ratio (x:y) is nothing more than a fraction itself. So if you had for example the ratio

2/5 : 10/5

This ratio could also be written as 1/5 : 5/5, or 1/5 to 1. Both numerators (the top number) are divisible by 2, so you can divide them both by 2 and end up with a simplified version of the same ratio.

Whatever ratio you end up with (14/6 : some other fraction), do the same thing to it. See if any of the numbers share a common factor, and simplify where possible. If it's not possible to simplify further, you're done.

6 0
2 years ago
What are the solutions of the equation 0=x^2-x-6
nikdorinn [45]
Min at (2,-4)
D=1-4*1*-6=25=> 2 real roots
x=3, -2
6 0
2 years ago
Calculate the value for each determinant:
Dafna1 [17]

Answer:

See explanations below

Step-by-step explanation:

Example of how to find the determinant of a 2×2 matrices is as shown;

\left[\begin{array}{ccc}a&b\\c&d&\end{array}\right]

= (a*d)-(b*c)

= ad - bc

Applying this to solve the given questions

1) (3*4) - (-3*-1)

= 12 - (3)

= 9

2) (-12*5)-(-1*12)

= -60 - (-12)

= -60+12

= -48

3) (0*4)-(-1*17)

= 0-(-17)

= 0+17

= 17

4) (8*-1)-(-4*-1)

= -8-(4)

= -8-4

= -12

5) (2*-1)-(2*-1)

= -2-(-2)

= -2+2

= 0

6) 1(1) - 0(0)

= 1 - 0

= 1

4 0
3 years ago
(Please help)
Sever21 [200]

Answer: 1044cm

Step by Step Explanation :

  1. separate the shape into a rectangle and a square. Subtract 46 from 21
  2. the rectangular shape is 30cm by 25cm LxW its 750cm
  3. the smaller shape on the side is 21 cm by 14cm LxW its 294.
  4. Add. 294cm + 750cm = 1044cm

5 0
2 years ago
Trayvon bought 2 gallons of milk at the supermarket. How many quarts did he buy
alisha [4.7K]
If Trayvon bought 2 gallons of milk he would of bought 8 quarts.

This is true because 1 gal=4 quarts
3 0
3 years ago
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