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Tcecarenko [31]
3 years ago
5

Working together, Melone and Mrs. Harris can complete lesson plans in 5.14 hours. Had she done it alone it would have taken Mrs.

Harris 9 hours. Find long it would take Mrs. Melone to do it alone
Mathematics
1 answer:
Dominik [7]3 years ago
7 0
It would have taken her 3.86 hours
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Please help me with this question:)
tester [92]

Answer:

Ada is correct.

Step-by-step explanation:

Problems with Naman:

Naman is supposed to follow PEMDAS, which is the order of operations, and stands for:

Parenthesis

Exponents (& Roots)

Multiplications

Division

Addition

Subtraction

~

The mistake: Naman moved +6 to the left and added it to the 2 located on the left side of the expression. You cannot do that, as it breaks the law of PEMDAS. On the other hand, Ada did the correct thing, which was to distribute 2 to all terms within the parenthesis (as one term in the parenthesis has a variable, and the other is a constant, meaning that they cannot be combined). This leads to Naman not doing the rest of the question correct.

Next, Ada correctly combined the two constants, which resulted in 0. 0 means nothing, therefore the placeholder is not needed. Therefore, 8x is the final answer.

3 0
3 years ago
What is the gcf of 10 and 25
HACTEHA [7]
The gcf of 10 and 25 is 5
5 0
3 years ago
Read 2 more answers
In triangle XYZ, the length of side XY is 23 mm and the length of side YZ is 36 mm. Which of the following could be the length o
svlad2 [7]
Answer: The correct answer is Choice D, 43 mm.

When you know 2 sides of a triangle, you can find the range for the final side of the triangle. 

First, if we subtract 36 - 23 = 13, the third leg must be more than 13. Otherwise, the two smaller legs would not meet to make the third leg.

Second, if we add 36 + 23 = 59, the third leg must be less than 59. Otherwise, the third leg would reach further than the other two legs could reach.

43 is the only number larger than 13 but smaller than 59 in our list.
7 0
3 years ago
Solve for x. (Similar Triangles)
Softa [21]

Answer:

x = 1

Step-by-step explanation:

its a special right trianlge. So both sides are the same.

3 0
3 years ago
Pythagorean theorem. Appreciate the help with this question . Thank you very much who ever help with the question .
NikAS [45]

\textit{using the pythagorean theorem} \\\\ c^2=a^2+b^2\implies c=\sqrt{a^2+b^2} \qquad \begin{cases} c=\stackrel{hypotenuse}{x}\\ a=\stackrel{adjacent}{30}\\ b=\stackrel{opposite}{40}\\ \end{cases} \\\\\\ x=\sqrt{30^2+40^2}\implies x=\sqrt{2500}\implies x=50

5 0
2 years ago
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