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Svetach [21]
3 years ago
13

A photocopy machine can print 405 copies in 9 minutes. what is the unit rate the machine can produce in 1 minute

Mathematics
1 answer:
Zolol [24]3 years ago
3 0

Answer:45

Step-by-step explanation: divide 405 by 9

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The map key says that every 3 centimeters is equal to 10 kilometers. If we measure 12 cm between our town and the next town over
Strike441 [17]

Answer:

40 kilometres

Step-by-step explanation:

3cm    :    10 kilometres

 x4            x4

12cm   :     40 kilometres

6 0
3 years ago
Read 2 more answers
At Taco Bell, I made a large purchase of 13 items that cost a total of $28.17. If Chicken Burritos cost $1.89 each and a Cheesy
Sonja [21]

Answer:

Number of Chicken Burritos purchased=7

Number of Cheesy Gordita Crunch purchased=6

Step-by-step explanation:

Let x be the number of Chicken Burritos  and y be the number of Cheesy Gordita Crunch.

Total number items purchased=13

Total cost of 13 items=$28.17

Cost of each Chicken Burritos=$1.89

Cost of each Cheesy Gordita Crunch=$2.49

We have to find number of each items purchased.

According to question

x+y=13.....(1)

1.89x+2.49y=28.17...(2)

Equation (1) multiply by 2.49 and  then subtract equation (2) from (1)

0.6x=4.2

x=\frac{4.2}{0.6}

x=7

Substitute x=7 in equation (1)

7+y=13

y=13-7=6

Number of Chicken Burritos purchased=7

Number of Cheesy Gordita Crunch purchased=6

6 0
3 years ago
An index that is a standardized measure used in observing infants over time is approximately normal with a mean of 90 and a stan
weqwewe [10]

Answer:

The proportion of children that have an index of at least 110 is 0.0478.

Step-by-step explanation:

The given distribution has a mean of 90 and a standard deviation of 12.

Therefore mean, \mu = 90 and standard deviation, \sigma = 12.

It is given to find the proportion of children having an index of at least 110.

We can take the variable to be analysed to be x = 110.

Therefore we have to find p(x < 110), which is left tailed.

Using the formula for z which is p( Z < \frac{x - \mu}{\sigma}) we get p(Z < \frac{110 - 90}{12} = 1.67).

So we have to find p(Z ≥ 1.67) = 1 - p(Z < 1.67)

Using the Z - table we can calculate p(Z < 1.67)  = 0.9522.

Therefore p(Z ≥ 1.67) = 1 - 0.9522 = 0.0478

Therefore the proportion of children that have an index of at least 110 is 0.0478

8 0
3 years ago
Solve 4x-2y=6 for x in terms for y
Elina [12.6K]

Answer:

x = 3 + y

Step-by-step explanation:

4x - 2y = 6

~Add 2y to both sides

2x = 6 + 2y

~Divide 2 to everything

x = 3 + y

Best of Luck!

5 0
2 years ago
Of all rectangles with a perimeter of 7​, which one has the maximum​ area? (give the​ dimensions.)
Elena L [17]
The rectangle with maximum area will actually be a square.

Each side will be of length  7/4 = 1 3/4.
3 0
3 years ago
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