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Dmitriy789 [7]
3 years ago
10

Mark can make 9 pancakes in 15 minutes, and Charlotte can make 42 pancakes in 45 minutes. Working together, how many minutes wou

ld it take to make 138 pancakes?​
Mathematics
1 answer:
Sedbober [7]3 years ago
4 0

Answer:

60 mins

Step-by-step explanation:

15+45=60

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Find X <br><br> Simplify answer type exact number or use radicals as needed
satela [25.4K]
On a right triangle, to find one missing side you can use this equation
a^2 + b^2 = c^2

a and b are the sides next to the right angle, and c is the hypotenuse (side not connected to right angle).

You first need to find the length of the dotted line before finding x. This is because to be able to use the above formula, you have to know the length of two out of three of the sides.

To solve the length of the dotted line, note that it also makes a triangle with the 5 unit line and the 5 √5 unit line. You can plug these numbers into the formula.
(5)^2+b^2=(5 √5)^2
25+b^2=125
b^2=100
b=10

Now that you know the length of the dotted line is 10 units, you can now solve for x

(20)^2+(10)^2=x^2
400+100=x^2
500=x^2
x= √500, which equals 22.361
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3 years ago
The national assessment of educational progress (naep) gave a test of basic arithmetic and the ability to apply it in everyday l
HACTEHA [7]
<span>Ans : a) What is the standard deviation of this sampling distribution? Ď /âšn = 60/âš840 =2.0702 b) 1 standard deviation of the mean = (1) 2.07 = 2.07 c) 272+/- 1(2.07) (269.93, 274.07)</span>
3 0
3 years ago
There are 50 students in a class. If 14% are absent on a particular day, find the number of students present in the class. What
Tcecarenko [31]

Answer:

i THINK 43% but im not for sure

Step-by-step explanation:

14% of 50 is 7

so 50-7=43

43(percent there)+7(percent gone)=50 (number of students)

SO 43% is still there.  

SORRY IF IM WRONG have a good night :)

3 0
3 years ago
HELP ME WITH MY MATH ASSIGNMENT, WILL GIVE ANYTHING, DUE TOMORROW! :(
nataly862011 [7]

Answer:

Answer is 225.

We have to find the sum of 15 terms of the series

sigma 1 to 15 (2n-1)

This can be split as per summation terms as

sigma 2n - sigma 1

sigma 2n can again be simplified by taking 2 outside

sigma 2n= 2 times sum of natural numbers of 1 to 15

= 2(15)(16)/2= 240

sigma 1= 1+1+...15 times= 15

Hence final answer is

= 2 times sigma n - (n) = 240-15 = 225.

Step-by-step explanation:


4 0
3 years ago
Read 2 more answers
Write the linear equation that gives the rule for this table.
stiks02 [169]

Answer:6-(3=5)

Step-by-step explanation:beacause you add +2

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3 years ago
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