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Vedmedyk [2.9K]
2 years ago
5

+5 when

Mathematics
2 answers:
Troyanec [42]2 years ago
6 0
Replace x with 4
1/2 * 4 + 5
2 + 5 = 7


Mark brainliest please
andrew11 [14]2 years ago
3 0

Answer:

B. 7

Step-by-step explanation:

\frac{1}{2}  \times 4 + 5 = 7 \\ sub \: in \: 4 \: into \: the \: equation

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Jason and Martin want to share 3 cookies equally. How much cookie will Jason and Martin each receive? Write an equation and expr
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Answer: each will get 3/2

Step-by-step explanation:

They will each get a whole cookie with one left over that they can break in half.

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If it cost $60 for 10 students to go on field trip and $70 for 20 student to go on field trip and it cost$80 for 30. How much wo
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Read 2 more answers
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3 years ago
Dave drove from town A to town B at an average speed of 70km/h. At the same time, Peter drove from town B to town A along the sa
padilas [110]

Remark

Every so often, someone comes up with a variation on the most basic physics formula d = r * t

We will need to think up three formulas to solve this. We may not need all three, but we need them to see how the problem works.

Formula one

<u><em>Where and when do they meet</em></u>.

The meet after 6 minutes before Peter finished. Peter finished the course after 24 minutes.  Six minutes before that they met. That's 18 after starting they met.

After 18 minutes they completed the course between them

hours to meeting = 18/60 = 0.3 hours

Dave met Peter after a distance of r * t = 70*0.3 = 21 km

Peter had traveled at some speed for 21 minutes = r1 * 0.3 = d1

So the total distance d = is 21 km + r1*0.3  = d

Six minutes later

<em><u>Peter's Progress</u></em>

6 minutes later Peter finishes distance D. He does this in 24 minutes.

d = r1 * 24 = r1*24/60 = r1 * 0.4 hours

<em><u>Dave's Progress</u></em>

d - 2 = 70 km/hr * 0.4 hr

d - 2 = 28 km

d = 28 + 2 = 30 km

Note this is the total distance that both  Peter and Dave travelled.

Question A

How far had  Dave gone before he met Peter.

Time = 18 minutes = 0.3 of an hour.

r = 70 km / hour

r = 70 km/hour * 0.3 hour

d = 21 km They met after Dave drove 21 km <<< Answer

Question B

<em><u>Peter's Rate</u></em>

d = 30 km

t = 24 minutes = 24/60 = 0.4 hours.

r = 30/0.4 = 75 km/hr.  <<<   Peter's Speed Answer

5 0
3 years ago
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