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2 years ago

Write three division word problem solve and check with multiplication

Mathematics

1 answer:

babymother [125]2 years ago

5 0

18 divided by 3... 3 times 6

14 divided by 7... 7 times 2

12 divided by 3 ... 3 x 4

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After traveling exactly half of its journey from station A to station B, a train was held up for 10 minutes. In order to arrive

Alex17521 [72]

Let's define variables:
s = original speed
s + 12 = faster speed
The time for the half of the route is:
60 / s
The time for the second half of the route is:
60 / (s + 12)
The equation for the time of the trip is:
60 / s + 60 / (s + 12) + 1/6 = 120 / s
Where,
1/6: held up for 10 minutes (in hours).
Rewriting the equation we have:
6s (60) + s (s + 12) = 60 * 6 (s + 12)
360s + s ^ 2 + 12s = 360s + 4320
s ^ 2 + 12s = 4320
s ^ 2 + 12s - 4320 = 0
We factor the equation:
(s + 72) (s-60) = 0
We take the positive root so that the problem makes physical sense.
s = 60 Km / h
Answer:
The original speed of the train before it was held up is:
s = 60 Km / h

8 0

2 years ago

Mr. Theorem writes the expression 6^2 Divided bye 23 on the board. What is the value

kicyunya [14]

Answer:

$1\frac{13}{23}$

Step-by-step explanation:

6² ÷ 23

36 ÷ 23

$1\frac{13}{23}$

5 0

2 years ago

Solve by substitution 9x+y=21, -x-3=y

VashaNatasha [74]

Answer:

point form: $(3,-6)$

equation form: $x=3, y=-6$

Step-by-step explanation:

4 0

2 years ago

Answer the following equation: d(-4) = 32

ikadub [295]

Answer:

d=-8

Step-by-step explanation:

-8 × -4=+32 ....always remember a positive number and negative number equals a negative number and negative number times a negative number is a positive number

8 0

3 years ago

A company produces packets of soap powder labeled "Giant Size 32 Ounces." The actual weight of soap powder in such a box has a N

Nataliya [291]

Answer:

C. 34.15 oz

Step-by-step explanation:

Problems of normally distributed samples are solved using the z-score formula.

In a set with mean $\mu$ and standard deviation $\sigma$ , the zscore of a measure X is given by:

$Z = \frac{X - \mu}{\sigma}$

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.

In this problem, we have that:

$\mu= 33, \sigma = 0.7$