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r-ruslan [8.4K]
3 years ago
15

Simplify the expression 7(a-3+4b)

Mathematics
1 answer:
castortr0y [4]3 years ago
4 0

Answer:

7a - 21 + 28b

Step-by-step explanation:

using the distributive property we can multiply 7 to the numbers in the paretheses. doing this we get:

7a - 21 + 28b

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If you want to convert 232323 to a fraction will you multiply by 10or 100​
Andre45 [30]

Answer:

it would actually be the opposite because if u multiply ur making the number higher, it can be a fraction but it would be 23/1 and thats a whole number u would need to divide by 100 and 100 bc if 10 u get 2 3/10 and if u divide by 100 u get 23/100 either way u get a fraction but if u divide by 10 u get a mixed fraction. If u just want a fraction u would have to divide from 100

Step-by-step explanation:

the same is for dividing decimals

8 0
3 years ago
Richard practiced each of 3 piano solos for 5/12 hour. how long did he practice in all?
maksim [4K]
You are given Richard’s piano practice for 3 piano solos. Every piano sol he makes takes 5/12 hour. You are asked to find how long Richard is going to practice his piano solo. So we have for every 1 piano solo he makes this is equal to 5/12 hours. This can be best represented by ratio and proportion.  

1 piano solo/(5/12 hour) = 3 piano solo/(number of hours)
Number of hours = 3 piano solo/ (1 piano solo/5/12 hours)
<u>Number of hours = 5/4 hours or 1.25 hours.</u>
5 0
3 years ago
A student studies the graph shown below and determines that the reflection of point a over the x - axis will result in a point a
Molodets [167]

The student is incorrect because if they were to reflect point A over the X-axis, this would mean they are moving it from its current quadrant to the one below. In that quadrant, the Y coordinate will be negative. So it couldn't possibly (6,3), because the 3 isn't negative.

5 0
3 years ago
Write an equation of the perpendicular bisector of the segment with endpoints U(-3,4) and V(9,8)
stealth61 [152]

Answer:

y=-3x+15

Step-by-step explanation:

the midpoint of UV (using the midpoint formula) is (3,6)

the slope of UV= 4/12= (1/3)

perpendicular slope is -3

now find line with slope -3 passing (3,6)

y-6=-3(x-3)

y=-3x+15

5 0
3 years ago
Sarah drove to her grandmother's house, which is 92 miles away. If it took her 2 hours, what was her average speed?
babymother [125]

Answer:

46 mph

Step-by-step explanation:

Distance = speed x time

92 mi = speed x 2 hr

speed = 92/2 = 46 mph

3 0
2 years ago
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