Answer:
Lets solve this algebraically
25 is what troy has.
Caitlin has $55
Step-by-step explanation:
x+2x+5=80 3x=75 x=25
Answer:
(a) -7, (b) 2
Step-by-step explanation:
a) When x = 0,
=> x² - 8x - 7
=> (0)² - 8(0) - 7
=> 0 - 0 - 7
=> - 7
b) When x = -1,
=> x² - 8x - 7
=> (-1)² - 8(-1) - 7
=> 1 + 8 - 7
=> 9 - 7
=> 2
<em>Hope</em><em> </em><em>it</em><em> </em><em>helps</em><em>.</em>
99(x-77)=99(x+88)
99x-7623=99x+8712
99x-99x=8712+7623
0=670824.no solution as x becomes 0
Answer:
a [2, -4, -6, -2]
Step-by-step explanation:
Ok so let the price for 1 red marble be R, and the price of one green marble be G.
We know Roman paid 70 cents for 4 red and 2 green marbles, so 4R + 2G = 70
We also know Bob paid 95 cents for 2 red and 5 green marbles, so 2R + 5G = 95.
However, if Bob bought double of each kind of marble, he would inevitably pay double as well, so 4R + 10G = 190
So if you subtracted the equations,
(4R+10G) - (4R+2G) = 190 - 70
So 8G is 120
G = 15
So a green marble is 15 cents.
Sub this back in:
4R + (2x15) = 70
4R = 40
R = 10
So a red marble is 10 cents.
So of Roger buys one of each, he pays 10 + 15 = 25 cents
Hope this helped
