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DENIUS [597]
3 years ago
5

When 19 is added to one-quarter of a number, the result is 40. What is the number?

Mathematics
2 answers:
Kaylis [27]3 years ago
6 0

Answer:

5.25

Step-by-step explanation:

1. 19 + 1/4x =40

2. 1/4x=40-19

3. 1/4x=21

4. x= 21/1/4

5. x= 5.25

Alborosie3 years ago
4 0
84. Subtract 19 from 40 and multiply that number times the reciprocal of 1/4... which is 4
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ivann1987 [24]
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Shen is on the swim team. Each week he swims a total of 5000 meters. How many kilometers does he swim each week?
Volgvan

Answer:

5 km

Step-by-step explanation:

to convert m to km you have to divide by 1000.

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hope this helps!

7 0
3 years ago
Aisha bought 15 apples and oranges for $9. 0. Each orange costs $0. 50, and each apple costs $0. 65. Let x represent the number
zhannawk [14.2K]

Answer:

x + y = 15

0.5x + 0.65y = 9

Step-by-step explanation:

x = number of oranges

y = number of apples

total of apples and oranges is 15 so x + y = 15

total cost of apples and oranges is $9 so 0.5x + 0.65y = 9

Calculation

y = 15 - x

0.5x + 0.65(15-x) = 9

0.5x - 0.65x + 9.75 = 9

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6 0
2 years ago
A new surgery is successful 75% of the time. if the results of 10 such surgeries are randomly sampled, what is the probability t
valentinak56 [21]
\text{Binomial Distribution: } P(X = r) = \binom{n}{r}(p)^{r}(1 - p)^{n - r}
P(X < 9) = 1 - P(X = 9) - P(x = 10)

P(X = 9) = \binom{10}{9}(0.75)^{9}(0.25)
P(X = 10) = \binom{10}{10}(0.75)^{10}

P(X < 9) = 1 - \binom{10}{9}(0.75)^{9}(0.25) - \binom{10}{10}(0.75)^{10}
\approx 0.755974769...
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3 years ago
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<u>Importance of origin:</u>

The point at which the two axes intersect is called the origin. The intersecting x- and y-axes divide the coordinate plane into four sections.

The origin is at 0 on the x-axis and 0 on the y-axis. Since the origin has an x-coordinate of 0 and a y-coordinate of 0, its ordered pair is written (0, 0).

The origin is used to determine the coordinates for every other point on the graph. It is generally the starting point on a grid.

In general, origin is the place where something comes from or the place where something originates.

8 0
3 years ago
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