2 years ago

Solve for x. 2x+3y=20 -2x+y=4

Mathematics

1 answer:

Mama L [17]2 years ago

3 0

Answer:

x = 1

Step-by-step explanation:

-2x + y = 4

y = 2x + 4

2x + 3y = 20

2x + 3(2x + 4) = 20

2x + 6x + 12 = 20

8x + 12 = 20

8x = 8

x = 1

You might be interested in

Write the following in scientific notation: 1. 5,400,000,000.=

Kazeer [188]

Answer:

5.4x10^9

Step-by-step explanation:

4 0

3 years ago

Read 2 more answers

Evaluate the function for the given value of x f(n)=n^2-6n+7n at n=3

vagabundo [1.1K]

F(n)=13
3^2-6(3)+7(3)=12

6 0

3 years ago

If the sum of interior angle measures of a polygon is 720, how many sides does the polygon have?

NISA [10]

Since the interior is 720 divide it by 180 and you will get 4 so 4=n-2 where the n means number of sides. Move the 4 over to n=4+2 and you get n=6

5 0

3 years ago

Read 2 more answers

Quick Question

omeli [17]

Answer:

1 * 10^12

Step-by-step explanation:

Scientific notation is a representation of a large number in a short form. The answer, 1*10^12 (read as ten to the twelfth power) essentially says that the number when expanded is 1 with 12 zeros appended to it. If you did a number like 7 trillion you would have 7 * 10^12.

Same thing can be applied for 1,000,000 (one million).

1 * 10^6 because one million has 6 zeros appended to it.

5 0

3 years ago

The factored form of a quadratic equation is y=(2x+1)(x-5), and the standard form is y=2x²-9x-5. Which of the following statemen

podryga [215]

x1= -5 x2=0.5 y= -5

the answer is b as the minuses can be interchanged for the x intercepts

Step-by-step explanation:

As you can see as explained in the pictures

7 0

3 years ago