All categories

3 years ago

PLZ ANSWER ASAP! What is the solution of the system of equations? {7/2x−1/2y=9/2 3x−y=5 Enter your answer in the boxes.

1 answer:

7 0

$\frac{7}{2} x - \frac{1}{2} y = \frac{9}{2} same \: as \: 7x - y = 9$
7x-y=9
3x-y=5 (multiply by -1 both sides of the equation)

7x-y=9
-3x+y=-5 (now add both equations)

7x-3x-y+y=4
4x=4 (divide by 4 both sides of the equation)

x=1

y=3x-5=3×1-5=-2

y= -2

answer: x=1, y=-2

You might be interested in

Which equation represents this sentence?

emmainna [20.7K]

C: 7(-n) - 3 = n + 4
hope it helps!

7 0

3 years ago

What is the probability of the sum of two rolled dies is 12

beks73 [17]

Hello ,

We know that a sum of six is only possible when the outcome is (6,6).

Also, Sample space = 36

Hence, Probability of getting sum as 12 is 1/36

Hope it helps

5 0

3 years ago

(Geometry), homework please Help me , will rate brainliestttt

amid [387]

9 the smallest angle is always opposite the smallest side

Answer: choice d, angle B

They couldn't match the choice letters with the angles? Geez.

10. That's an isoscles triangle

d + d + 116 = 180

2d = 64

d=32

choice a

11. 62+45+k=180

k=180-107 = 73

choice b

6 0

3 years ago

EXPERTS ONLY its not 0 or 128 In how many ways can you put seven marbles in different colors into four jars? Note that the jars

KonstantinChe [14]

Answer: 16384

Step-by-step explanation:

Given, Total jars = 4

Total marbles = 7

Since we need to put marbles in 4 different jars, we need to choose a jar each time.

Possible choices for jars =4

Number of time we need to choose = number of marbles

So, by fundamental counting principle, we have

Total ways to put 7 marbles in 4 jars = $4\times4\times 4\times 4\times4\times 4\times 4$

$=4^7\\\\=16384$

Hence, the required number of ways =16384

7 0

3 years ago

Please help ! in class and don't understand!

Alex777 [14]

Answer:

I'll do the first one and lets see if that helps

Step-by-step explanation:

4 0

3 years ago