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AVprozaik [17]
2 years ago
7

Last semester, Zachary earned an average score of 80 points on math tests. So far this semester, his average score is 15% lower.

What is the average of Zachary's scores this semester?
Mathematics
2 answers:
Ghella [55]2 years ago
7 0

Answer:

The answer would be 12

Step-by-step explanation:

15/100 =  X/80

To solve the equation above for X, you first switch the sides to get the X on the left side, then you multiply each side by 80, and then finally divide the numerator by the denominator on the right side to get the answer.

The equation

15/100 = X/80

X/80 = 15/100

X*80/80 = 15*80/100

X = 1200/100

X = 12

Ostrovityanka [42]2 years ago
4 0
Look here no one help if people do too much time waste till help received just use app names guthmath helps with math and use this code P9EJ5H to get answere because believe me u will wait alot the app is free
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The width of a rectangle measures (2.5u+9.8)(2.5u+9.8) centimeters, and its length measures (1.5u+3.9)(1.5u+3.9) centimeters. Wh
icang [17]

Solution,

We have,

Width of rectangle, b = (2.5u+9.8) cm

Length of rectangle, l = (1.5u+3.9) cm

We need to find the expression for the perimeter of the rectangle. The formula for the perimeter of a rectangle is given by:

Perimeter = 2(l+b)

P = 2[(2.5u+9.8)+(1.5u+3.9)]

Collecting like terms

P = 2[(2.5u+1.5u)+(9.8+3.9)]

P=2(4u+13.7)

⇒ P = 8u+27.4

So, the expression for the perimeter of the rectangle is (8u+27.4) cm.

3 0
3 years ago
The data shown in the table below can be
nignag [31]
Hello there! The missing y-values are 12, 14, and 16.

Given all our x-values and two additional y-values, we can see that multiplying the x-value by 2 gives us the y-value. This is shown when x is 5 and 9, because multiplying 5 by 2 gave us 10, and multiplying 9 by 2 gave us 18. Because of this rule, we can multiply each given x-value by 2 to receive our y-value. Once solving, we also notice that the y-values all add by 2 to get the next factor as the data number increases. Hope this helps!
8 0
2 years ago
Derrick goes to the store and buys a pair of shoes for $79.99, a shirt for $24.99, and a pair of shorts for $34.99. If the sales
alexandr402 [8]

Answer:

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Step-by-step explanation:

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6 0
2 years ago
An object is hanging by a string from your rearview mirror. While you are decelerating at a constant rate from 25 m/s to rest in
lidiya [134]
The rate of deceleration is equal to 25 m/s / 6 s = 25/6 m/s^2. 


(a) The string should be angled in such a way that the horizontal acceleration is equal to 25.6 and the vertical acceleration is equal to gravitational acceleration. Using trigonometry,Angle from the vertical = arctan(25/6 / 9.8) = 23.03 degrees.

(b) Since the car is decelerating, one end of the string attached to the car is pulled back and because of the inertia of the object it is goes on the opposite direction and so the object moves toward the windshield.


I hope my answer has come to your help. Thank you for posting your question here in Brainly. We hope to answer more of your questions and inquiries soon. Have a nice day ahead!
4 0
3 years ago
—PLEASE HELP QUESTION IS IN PIC—
Anarel [89]

Answer:

ur answer is A

Step-by-step explanation:

I just did the problem

6 0
3 years ago
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