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maksim [4K]
3 years ago
8

Plz help me i need help its for a test i give brailies (:

Mathematics
1 answer:
Anarel [89]3 years ago
8 0
C......................................
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What is the solution of this system of linear equations? 3y = x + 6 y – x = 3
Greeley [361]
Hello :
<span>3y = x + 6 ...(1)
y – x = 3...(2)
by (2) : y = x+3...(*)
subsct in (1) :
3(x+3) = x+6
3x-x= -9+6
2x= -3
x=-3/2
subsct in (*) : y =-3/2 +3 =3/2</span>
3 0
3 years ago
Read 2 more answers
You and your friend each collect rocks and fossils. Your friend collects three times as many rocks and half as many fossils as y
pochemuha

Answer:

I collect 4 rocks and 16 fossils. While my friend collects 12 rocks and 8 fossils.

Step-by-step explanation:

The number of total objects collected by me  = 20

The number of objects collected by my friend  = 20

Let us assume:

The number of rocks collected by me  = m

The number of fossils collected by me  = 2 k

⇒ m +  2 k =  20  .... (1)

So, according to the question:

The number of rocks collected by my friend = 3 x (rocks collected by me)  

= 3 x (m)  = 3 m

The number of fossils collected by my friend = 1/2 x (fossils collected by me)    = 1/2 x (2k )  = k

⇒ 3 m +   k =  20  .... (2)

Solving (1)and (2) for the value of m and k, we get:

m +  2 k =  20     ⇒ m = 20 - 2 k ... Put this in (2)

3 m +   k =  20  ⇒  3 (20 - 2 k) +  k = 20

⇒ 60 - 6 k +  k  = 20

or, - 5k = -40

or, k = 40/5  = 8

⇒ k= 8

m + 2(8)  = 20

or, m = 4

Hence, the number of rocks collected by me  = m = 4

The number of fossils collected by me  =  2 k = 2 (4)  = 16

Hence, the number of rocks collected by my friend   = 3 m  = 3 x 4 = 12

The number of fossils collected by my friend   =   k =  8

Hence, I collect 4 rocks and 16 fossils. While my friend collects 12 rocks and 8 fossils.

4 0
2 years ago
I need help :( (please explain how you got your answer too)
ch4aika [34]

Answer:

a. fly = 5.7

b. fly = 7.5

Step-by-step explanation:

a.

hoist/fly = 1 / 1.9

The new hoist is 3. To get this you have to multiply 1 by 3. That means you have to multiply 1.9 by 3 too.

1.9 * 3 = 5.7

b.

hoist/fly = 3/5 (this is the new ratio)

4.5 / 3 = 1.5

5 * 1.5 = 7.5

6 0
2 years ago
When completing the square, does the value of A always need to be one?<br> Thanks
Greeley [361]

Yeah, mostly is has to be negative, but in some cases a is greater than 1 than we do some other operations.

4 0
2 years ago
If the revenue for the week is $2000, and labor cost consists of two workers earning $8 per hour who work 40hours each, what is
Arada [10]
The percentage of the revenue is 32% hope this helps!
4 0
3 years ago
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