Answer:
You will need to use simultaneous equations.
Method:
Get both equations to have the same subject, in this case we will multiply the first equation by 4
1) 2x-y = -1
Becomes
1) 8x-4y = -4
Then make both equations equal to 4y.
1) 8x+4= 4y
2) 4y = -5x + 17
Because they both equal 4y, that means they are equal to each other.
8x+4 = -5x+17
Now solve for x.
13x = 13
x = 1
Now that we have x, we can substitute it back into either equation to get y. I will use equation 1 because it is less complex.
2x-y = -1
2(1)-y = -1
y = 3
Answer:
8) 18.84 ft
9) 87.92 in
Step-by-step explanation:
circumference= 
× 2 × radius
8) 3.14 × 2 × 3 = 18.84 ft
9) 3.14 × 2 × 14 = 87.92 in
Hope this helps youuu! :D
Answer:
7,920,000
Step-by-step explanation:
The question is asking the number of times that 4 inches fits in 500 miles. We need to divide 500 miles by 4 inches, but first we need to convert 500 miles into inches.
12 inches = 1 foot
5280 ft = 1 mile
500 miles * (5280 ft)/(1 mile) * (12 in.)/(1 ft) = 31,680,000 inches
Now that we know that 500 miles is the same as 31,680,000 inches, we divide that number of inches by 4 inches.
(31,680,000 inches)/(4 inches) = 7,920,000
Answer: 7,920,000
28% of the marbles are green because there is a total of 25 marbles and 7/25 is 0.28. This translates to 28%.
