Ron's piano lesson starts in 2 hours. It takes him 30 minutes to get to the lesson. He has45 minutes of homework, and he must walk his dog for 25 minutes. Ron wants to know
he has enough time to finish his homework and walk the dog before his lesson. Explain
whether he should find an underestimate or an overestimate of the total time needed
Then estimate the total time and tell whether Ron has enough time for both tasks
is needed
Answers
Answer:
2 hours=120 mins
120-(45+25)
120-(70)
50
Ron has enough time to finish his homework and walk the dog before his lesson. Ron should overestimate the total time needed. Since Ron has 50 minutes to spare he could add 25 to home work time and another 25 to walking his dog. he still ha time to do both.
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If it is me, my first step would be either doubling the first equation so the coefficients of x in both equations equal to each other, or tripling the second equation so the coefficient of y in both equations is set equal.
2x-9y=6
4x-3y=-7
3(second euation) =12x-9y=-7
second equation subtract the first equation
10x=-13
x=-13/10
Then we can plug x in any of the two original equations and solve for y which i got to be -19/15
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Answer:
Meters
Step-by-step explanation:
Miles are to big to measure the distance of a city block, and inches are too small.
If she were to use inches, the number of the measure would be too large, and not easy to imagine and of she were to use miles, it would be a little number (like a fraction or decimal number), that wouldn't be as easy to understand. Instead, using meters, the measurements wouldn't be too little or to big, they would be between 50 or 150 meters on average, so these are numbers more usable and practical.
Answer:
Step-by-step explanation:
The city planner should use distance to measure the city block
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The answer is: x = 7.
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The fraction of the surfacearea that is white is 2/9.
What is a cube?
It is a polygon having six faces.
The volume of a cube is Side³.
We have,
Cube:
Volume = Side³
Side = 3 inch
Volume = 3³ = 27 inches³
Now,
Redcubes = 21
White cubes = 6
Now,
The total surfacearea of the cube.
= 6 x side²
= 6 x 3²
= 6 x 9
= 54 inches²
Now,
27 cubes make the total surface area 54 inches².
27 cubes = 54 inches²
Multiply 6/27 on both sides.
6 white cubes = 6/27 x 54
6 white cubes = 12 inches²
Now,
White surfacearea = 12/54 inches²
12/54 = 2/9
Thus,
2/9 fraction of the surfacearea is white.
Learn more about cubes here:
#SPJ2
The volume of the smaller cubes is 1*1*1, which is 1.
27/1=27
That means all cubes will be used, so only the placement of the cubes matter.
The center of the cube will show no sides,
The center of the face will show 1 side, which has a surface area of 1sq.in.
Since there are 6 white cubes and 6 faces with 6 face centers, and only one cube center, there will be 5 cubes on the center of the faces and 1 in the cube center.
This means there will be 0 faces of 1 cube and 1 faces shown for the rest of the cubes. Since each face is 1sq.un., the rest is math
(0*1)+((1*1)5)
(0)+(1*5)
0+5
5sq.un. of the cube is white.
a=The fraction of surface area showing
b=Surface area of large cube
b=3*3*number of sides on cube(6)
5*a=b
5*a=54
a=54/5
Your answer is 54/5.