Answer:
Step-by-step
explanation
explanation is attached to the picture
hope this helps
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The opposite of a nonzero integer is the inverse of it. So to get the opposite, change the sign.
For example:
What's the opposite of 3?
-3.
I hope that I explained well :)
9514 1404 393
Answer:
90 miles
Step-by-step explanation:
Let d represent the distance to Grandma's house.
The speed going was ...
speed = distance/time
speed = d/2
The speed coming home was ...
speed = d/2.25
The difference of these speeds is 5 miles per hour:
d/2 -d/2.25 = 5
2.25d -2d = 5(4.50) . . . . . multiply by 4.50
0.25d = 22.5 . . . . . . . . . . .simplify
d = 90 . . . . . . . . . . . . . . . . multiply by 4
Grandma's house is 90 miles away.
Solve for m.
Add 7 to both sides to get 3m=15
Then divide by sides by 3 to get m=5.
The final answer is m=5.
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Define jam and bread mix
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Let the number of jar of jam be x
Let the number of packages of bread mix be y
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Form equations and solve
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x + y = 8 --------------------- (1)
6x + 5y = 45 ---------------- (2)
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Rewrite equation to make x the subject
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x+ y = 8
x = 8 - y ----------------------------(1a)
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Substitute (1a) into (2)
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6(8 - y) + 5y = 45
48 - 6y + 5y = 45
y = 48 - 45
y = 3
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Substitute y = 3 into (1) to find x
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x + 3 = 8
x = 8 - 3
x = 5
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Find jam and bread mix
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Jars of Jam = x = 5
Packages of bread mix = y = 3
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Answer: Jam = 5 ; bread mix = 3
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