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Salsk061 [2.6K]
3 years ago
10

X + y = 4 x - 2y = -5 If the first equation is multiplied by 2 and then the equations are added, the result is _____.

Mathematics
2 answers:
Troyanec [42]3 years ago
8 0
X + y = 4....multiplied by 2 = 2x + 2y = 8

x - 2y = -5
2x + 2y = 8
---------------add
3x = 3......u r correct <==
kobusy [5.1K]3 years ago
3 0
Yes you are correct
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Tina ordered a pizza for lunch. The pizza is round and has a radius of 8 inches. Tina only ate 13 of the pizza and took home the
Alex Ar [27]

Correction

brainly.com/question/15712098

Answer:

67.02\ in^2

Step-by-step explanation:

-We find the surface area of the formula as follows:

A=\pi r^2, \ \ r=radius=8\ in\\\\=\pi \times 8^2\\\\=201.06\ in^2

#We then find the area of the remaining fraction if she only ate one third:

Eaten=\frac{1}{3}\times Area\\\\=\frac{1}{3}\times 201.06\ in^2\\\\=67.02\ in^2

Hence, Tina ate 67.02\ in^2 of the pizza.

3 0
2 years ago
Which function has a greater rate of change? Function A: x 1.5 2.5 3.5 4.5 5.5 y 5 0 –5 –10 –15 Function B: y = –4.5x + 15 Funct
expeople1 [14]

Answer:

Function A has a rate of change of -5 and Function B has a rate of change of -4.5, so Function B has a greater rate of

Step-by-step explanation:

Function A:

\begin{array}{cccccc}x & {1.5} & {2.5} & {3.5} & {4.5} & {5.5} \ \\ y & {5} & {0} & {-5} & {-10} & {-15} \ \end{array}

Function B:

y = -4.5x + 15

Required

Which has a greater rate of change

The rate of change of function A is calculated as thus:

m = \frac{y_2 - y_1}{x_2 - x_1}

Where:

(x_1,y_1) = (1.5,5)

(x_2,y_2) = (2.5,0)

So, we have:

m = \frac{0-5}{2.5 - 1.5}

m = \frac{-5}{1}

m = -5

For function B

The general function is:

y = mx + b

Where

m is the rate of change

By comparing y = mx + b to y = -4.5x + 15

m = -4.5

So, we have that:

Function A has a rate of -5; function B has a rate of -4.5.

By comparison: -4.5 is greater than 5

Hence, function B has a greater rate.

4 0
3 years ago
Plz help me well mark brainliest!..
VladimirAG [237]

9514 1404 393

Answer:

  (a)  (-3/4, 1/2)

Step-by-step explanation:

There are 4 grid lines between 0 and 1 in each direction, so each grid line represents 1/4 unit. Two of them is 1/2 unit; 3 of them is 3/4 unit. The x-dimension is listed first in the ordered pair.

Point S has coordinates (-3/4, 1/2).

5 0
3 years ago
I AM IN NEED OF HELP THANKYOU
Varvara68 [4.7K]
Oh okay I’m not going home I’m sorry I don’t have to sleep tueitu lol I
8 0
2 years ago
4=17-k <br>What does k equal?​
labwork [276]

Answer:

13

Step-by-step explanation:

17-4=13 therefore 17-13=4

5 0
2 years ago
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