1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
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
You might be interested in
X to the second power(x to the fifth power)
zysi [14]
X to the seventh power
7 0
3 years ago
Elena, Lin, and Noah all found the area of Triangle Q to be 14 but they reasoned about it differently, as shown in the diagrams
vfiekz [6]

Answer:

yes it is

Step-by-step explanation:

7 0
3 years ago
4. How fast was a driver going if the car left skid marks that were 32 feet long on dry concrete? (The coefficient of friction i
Monica [59]

Answer:

v_{o} \approx 31.247\,mph

Step-by-step explanation:

The deceleration experimented by the car is the product of kinetic coefficient of friction and gravitational constant:

a = \mu_{k}\cdot g

a = (1.02)\cdot \left(32.174\,\frac{ft}{s^{2}} \right)

a = 32.817\,\frac{ft}{s^{2}}

The initial speed is computed from the following kinematic expression:

v^{2} = v_{o}^{2} - 2\cdot a \cdot \Delta s

v_{o} = \sqrt{v^{2}+2\cdot a\cdot \Delta s}

v_{o} = \sqrt{\left(0\,\frac{ft}{s} \right)^{2}+2\cdot \left(32.817\,\frac{ft}{s^{2}} \right)\cdot (32\,ft)}

v_{o}\approx 45.829\,\frac{ft}{s}

v_{o} \approx 31.247\,mph

8 0
3 years ago
Work out the area of this triangle.<br><br> I will mark you as brainliest, please help quick.
nataly862011 [7]

Answer:

<u><em>22 cm²</em></u>

Step-by-step explanation:

Work out the area of this triangle.

Area Formula: 1/2b * h where b = base (11cm) and h = height (4 cm)

1/2 *11 * 4 =

5.5 * 4 =

<u><em>22 cm²</em></u>

3 0
2 years ago
From 3 hours to 30 minutes Percentage
omeli [17]
What are u asking ? 30 minutes of 3 hrs the fraction would be 2/6 simplified would be 1/3 and the percentage would be 33.3 repeating percent
7 0
3 years ago
Read 2 more answers
Other questions:
  • Is the ordered pair (5,2) a solution of the equation f (x) = x - 3?
    5·1 answer
  • Rebecca's father is 2 times as old as Rebecca. The sum of their ages is no less then 69. Find an inequality that can be used to
    11·1 answer
  • The probability of the complement of an event is ____ less than the probability of the event itself A. sometimes B. always C. ne
    13·1 answer
  • Carl runs around a track in 1.17 minutes. How long would it take him to run 1.5 laps at this rate? [Round to two places.]
    8·2 answers
  • suppose you are going to graph the data in the table below. what data should be represented on each axis and what would be the a
    9·1 answer
  • Consider a system with one component that is subject to failure, and suppose that we have 120 copies of the component. Suppose f
    11·1 answer
  • TotoToday everything at a store is on sale. The store offers a 20% discount. The regular price of a T-shirt is $18. What is the
    15·1 answer
  • What is the length of AB?
    9·1 answer
  • A large square is divided into 4 smaller squares; then small left square is
    8·1 answer
  • Determine whether these two ratios make a proportion;3/8, 24/64<br> True or False
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!