Answer:
It is 2 i : 2 imaginary solutions
Step-by-step explanation:
Step-by-step explanation:
(x-3y=7)2
2x-6y=14
- 2x-6y=12
__________
-12y=2
y=-1/6
No solutions
Answer:
Step-by-step explanation:
Given that,
A bricklayer needs to order 6300kg of building sand.
1 grain of this sand weighs 
.
We need to find how many grains of sand are there in 6300 kg.
It can be just calculated as follows :
1 grain of sand =
or
= 90000000 grans of sand
So, 6300 kg is equal to .
Might be better if you typed the question
So our equation to find this can be represented by 7x + 10 = 45.
(x representing miles run)
Just solve for x!
Subtract the 10 from both sides, you've got
7x = 35
And now to isolate the x, we divide both sides by 7.
Now we're left with just
x = 5!
We can check this by substituting 5 as x in our equation.
7x x 5 + 10 = 45
45 = 45
It's right!
So the runner ran 5 miles total.
Hope this helps!
If I skimmed over this too much, let me know and I'll try to explain the best that I can.
