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PIT_PIT [208]
3 years ago
15

Question 3

Mathematics
1 answer:
zhuklara [117]3 years ago
5 0

Answer:                     -30

Step-by-step explanation: -13 subtract 17 = -30

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A student has an average of 78 on seven chapter tests. If the student's scores on six of the tests are 76, 74, 76, 80, 83, and 9
zhenek [66]

Answer:

The score is 66

Step-by-step explanation:

Say the unknown score is x

Average = Total score/no of occurrence

78 = (x + 76 + 74 + 76 + 80 + 83 + 91)/7

78 × 7 = x + 76 + 74 + 76 + 80 + 83 + 91

546 = x + 480

546 - 480 = x

66 = x

∴ x = 66

4 0
3 years ago
What is the perimeter in centimetres of a regular octagon with sides measuring 17 mm?
Anit [1.1K]

Answer:

1.36 centimeters

Step-by-step explanation:

Given,

side length ( a ) = 17 mm

To find : Perimeter of regular octagon ( in cm )

Octagon has 8 sides.

Perimeter of regular octagon

= 8 x a

= 8 x 17

= 136 mm

1 mm = 0.1 cm

136 mm

= 136 x 0.1

= 1.36 centimeters ( cm )

Hence,

Perimeter of regular octagon is 1.36 centimeters.

7 0
2 years ago
Read 2 more answers
Can someone help me?<br><br>​
Kipish [7]
The answer is 3 for sure.
8 0
3 years ago
Read 2 more answers
(e+3)(e-5) expanded and simplified
Zarrin [17]

Step-by-step explanation:

(e + 3)(e - 5) \\ e \times e + e \times  ( - 5) + e \times e + e \times 3 \\  { e}^{2}  + ( - 5e) +  {e}^{2}  + 3e \\  {2e}^{2}  + ( - 2e)

In this type of math equation, you have to multiply all members from the first part with the second part.

Expanded:

e \times e+e \times (-5)+e \times e+e \times 3

simplified:

{2e}^{2}  + ( - 2e)

8 0
3 years ago
If you toss three coins, what are the odds in favor of getting exactly two tails and one head?
jekas [21]

Answer:

I think the answer is 3:5

7 0
3 years ago
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