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3 years ago

9/10 divided by (-3/5) as a mixed number

Mathematics

1 answer:

IRINA_888 [86]3 years ago

6 0

Answer:

-1 1/2

Step-by-step explanation:

9/10 ÷ -3/5

Copy dot flip

9/10 * -5/3

-45/30

Divide the top and bottom by 15

-3/2

Change this to a mixed number

-1 1/2

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The time it takes to clean up after an anniversary party varies inversely as the number of people cleaning. If 3 people work tog

Norma-Jean [14]

Answer:

54minutes

Step-by-step explanation:

Let the time taken to clean up be t

Let the number of people cleaning be n

If the time it takes to clean up after an anniversary party varies inversely as the number of people cleaning then;

t = k/n

k is the constant of proportionality

If 3 people work together to clean, and took them 90 minutes, this means

at t = 90, n=3

Substitute

90 = k/3

k = 3×90

k = 270

To et the time it will take 5people to clean, the will say;

t =k/n

t =270/5

t = 54 minutes

Hence it will take 5 people 54minues to clean

3 0

2 years ago

Read 2 more answers

For this graph mark the statements that are true

Nitella [24]

For the graph in the figure

we know that

the function is a quadratic equation ( vertical parabola) open up

The vertex is a minimum

the vertex is the point $(1,0)$

The domain x of the function is all real numbers-------> (-∞,∞)

The range is the interval--------> [0,∞)

$f(x)\geq 0$

therefore

Statements

A) The range is the set of all real numbers

Is false

B) The domain is the set of all real numbers

Is true

C) The domain is the set of all real numbers greater than or equal to zero

Is false

D) The range is the set of all real numbers greater than or equal to zero

Is true

7 0

2 years ago

It takes 60 minutes for 7 people to paint 5 walls. How many minutes does it take for 10 people to paint 10 walls?

sweet-ann [11.9K]

60 = 5k/7

420 = 5k

84 = k

m = 10(84)/10
m = 84

Hope this helps!

7 0

3 years ago

A new motorboat costs $6000. The value of the boat decreases by 15% each year. What is the value of the boat after 3 years?

Elodia [21]

Answer:

The value of the boat after 3 years is $\$3,684.75$

Step-by-step explanation:

we know that

The formula to calculate the depreciated value is equal to

$V=P(1-r)^{x}$

where

V is the depreciated value

P is the original value

r is the rate of depreciation in decimal

x is Number of Time Periods

in this problem we have

$P=\$6,000\\r=15\%=15/100=0.15\\x=3\ years$

substitute

$V=6,000(1-0.15)^{3}$

$V=6,000(0.85)^{3}$

$V=\$3,684.75$

6 0

2 years ago

Must have third quartile of a data set be less than the maximum value? Explain.

frez [133]

Since there is an even number of values, we need the mean of the middle two values to find the first quartile: The lower half of a data set is the set of all values that are to the left of the median valuewhen the data has been put into increasing order.

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3 years ago