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aivan3 [116]
3 years ago
10

In right triangle ABC, altitude CD is drawn to the hypotenuse. If

Mathematics
1 answer:
Free_Kalibri [48]3 years ago
7 0

Answer:

A but I'm not so sure

Step-by-step explanation:

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An instructor wants to write a test with 25 questions where each question is worth 3, 4, or 5 points based on difficulty. He wan
irakobra [83]

ANSWER

Find out the how many 3, 4, and 5 point questions could there be.

To proof

Let us assume that the 3 points based question be = x

Let us assume that the 4 points based question be = y

Let us assume that the 5 points based question be = z

As given

An instructor wants to write a test with 25 questions

than the equation become in the form

x + y + z = 25

he quiz to be worth a total of 100 points.

than the equation is becomes

3x + 4y + 5z =100

As given

He wants the number of 3-point questions to be 4 less than the number of 4-point questions

x = y -4

Than the three equation are

x + y + z = 25 ,3x + 4y + 5z =100 and x = y -4

put  x = y -4 in the x + y + z = 25 ,3x + 4y + 5z =100

than

2y + z = 29, 7y +5z= 112

multiply 2y + z = 29 by 5 and subtracted 7y +5z= 112

10 y -7y + 5y -5y = 145 -112

3y = 33

y = \frac{33}{3}

y =11

put in the  x = y -4

x = 11-4

x= 7

put the value of x ,y in the x + y + z = 25

7 + 11 +z =25

18 +z = 25

z = 25 -18

z=7

therefore

numbers of the 3 point question be = 7

numbers of the 4 point question be = 11

numbers of the 5 point question be = 7

Hence proved



3 0
3 years ago
(6x3)2 = 62(x3)2 = 36x6<br> True or false
Xelga [282]

Answer:

false

Step-by-step explanation:

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3 years ago
Which equation describes the
Vesna [10]

Answer:

The answer is no.d b= 2a + 1

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What is the value of the expression 9+n/3-6 when n is 12?
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-7 (9+12/3-6)=21/-3=-7
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5/6 as a decimal and terminating
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