David can proofread15 reports in an hour while Armando can proofread 37reports in an hour. If they have 400 reports to proofread
2 answers:
Answer:
Step-by-step explanation:
Given,
The number of reports proofread by David in one hour = 15,
While, the number of reports proofread by Armando in one hour = 37,
Total reports proofread by both of them in one hour = 15 + 37 = 52,
Also, the number of reports have to be proofread = 400
Hence, the time taken by both of them when they work together
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Answer:
A. Hypotenuse-leg (HL) congruence.
HL, when you have 2 right triangles and their hypotenuses are congruent you are able to say HL
Step-by-step explanation:
We know that the hypotenuse-leg theorem states that if the hypotenuse and one leg of a right triangle are congruent to hypotenuse and corresponding leg of another right triangle, then the triangles are congruent.
hypotenuse(AB) of △BDA equals to hypotenuse (CD) of △DBC.
BDA and DBC share a common side DB.
Using Pythagorean theorem we will get,
We have been given that CD=AB, Upon using this information we will get,
Upon subtracting from both sides of our equation we will get,
Answer:
The number of textbooks of each type were sold is <u>134 math </u>and <u>268 psychology </u>books.
Step-by-step explanation:
Given:
Total number of math and psychology textbooks sold in a week is 402.
Now, let the number of math textbooks sold be .
And, the number of psychology textbooks be .
According to question:
Dividing both sides by 3 we get:
So, total number of math textbooks were 134 .
And, total number of psychology textbooks were
.
Therefore, the number of textbooks of each type were sold is 134 math and 268 psychology books.