All categories

3 years ago

-x-2y=9x+4y=9elimination

1 answer:

8 0

You add the second equation to the first which eliminates x and leaves you with 2y=18 so you divide 18 by 2 which is 9 so y=9 now you fill in one question for y so do x+4(9)=9 you get x+36=9 now subtract 36 from 9 and you get -27 so x=-27 and y=9

You might be interested in

Experts please answer ASAP! Thank you in advance, and remember to wash your hands with antibacterial soap for 1 minute.

Tems11 [23]

area of trapezoid with dimensions $b_1 = 4\frac{1}{4} , b_2 = 3\frac{3}{4}, h = 2\frac{1}{2}$ is $Area =10in^2$ .

Step-by-step explanation:

We know that area of trapezoid is , area = $(\frac{a+b}{2} )h$ , where a & b are bases and h is height . We have , $b_1 = 4\frac{1}{4} , b_2 = 3\frac{3}{4}, h = 2\frac{1}{2}$ .

Area = $(\frac{a+b}{2} )h$

⇒ $Area = (\frac{a+b}{2} )h$

⇒ $Area = (\frac{b_1+b_2}{2} )h$

⇒ $Area = (\frac{4\frac{1}{4} +3\frac{3}{4}}{2} )(2\frac{1}{2} )$

⇒ $Area = (\frac{\frac{17}{4} +\frac{15}{4}}{2} )(\frac{5}{2} )$

⇒ $Area = (\frac{\frac{17+15}{4}}{2} )(\frac{5}{2} )$

⇒ $Area = (\frac{\frac{32}{4}}{2} )(\frac{5}{2} )$

⇒ $Area = (\frac{8}{2} )(\frac{5}{2} )$

⇒ $Area = (\frac{40}{4} )$

⇒ $Area =10in^2$

Therefore, area of trapezoid with dimensions $b_1 = 4\frac{1}{4} , b_2 = 3\frac{3}{4}, h = 2\frac{1}{2}$ is $Area =10in^2$ .

6 0

3 years ago

There are 4 students in a study group they each have to complete 40 math problems per week. Here are the amounts they each have

guapka [62]

(100%,45/40,2/3,0.4)

7 0

3 years ago

Read 2 more answers

Hotdogs come in packages of 10, while rolls come in either 8 or 12. What is the smallest number of packages of each you have to

Maslowich

if the rolls come in 8

then we check which multiples 8 and 10 have in common which is 40

8,16,24,32,40

10,20,30,40

which is 5 packages of rolls and 4 pack of hot dogs

if the rolls are 12

we check the multiples which they have in common

12,24,36,48,60

10,20,30,40,50,60

which is 5 packages of rolls and 6 pack of hot dogs

Pls mark as brainliest

6 0

2 years ago

Tell whether the given value is a solution of the inequality. (yes or no) -2 ≤ k/3; k = -9

olga55 [171]

Answer: No, it is not a solution

Work Shown:

-2 ≤ k/3

-2 ≤ -9/3

-2 ≤ -3

The last inequality is false because -3 should be smaller than -2 (not the other way around). Use a number line to help see this.

Since the last inequality is false, the original inequality must also be false for that particular k value. Therefore, k = -9 is not a solution.

4 0

2 years ago

PLEASE HELP!! HURRY BUT I DON'T WANT GUESSES

Lorico [155]

The square on the hypotenuse is skew and impossible to visually validate. There's nothing to sum. It is a simple calculation to note that 32+42=5232+42=52, but its picture doesn't 'say' that the angle between the 3 and 4 sided square must be 90 degrees.

7 0

3 years ago