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
balu736 [363]
3 years ago
9

80% of the students in Lea’s class earned an A or a B on the weekly math test. If 20 students got an A or a B, how many students

are in Lea’s class?
Will give Brainliest!!

P.S. This is 6th Grade math on Edge 2020
Here are the options:
0 20 is 80% of what number?
0 20 × 4 = 80, so 100 × 4 = 400 students
0 20 + 60 = 80, so 100 + 60 = 160 students
0 80 ÷ 4 = 20, so 100 ÷ 4 = 25 students
0 80 – 60 = 20, so 100 – 60 = 40 students
Mathematics
2 answers:
frutty [35]3 years ago
5 0
A. 20 is 80 of what number
blondinia [14]3 years ago
5 0

Answer:

25

Step-by-step explanation:

80% got A orB  out of 100% so

20 students are 80% of the class

we need 20% to find all 100% so

80%/4=20% and 20/4=5 students represent 20%

100%= 80%+20% =20students+5students=25 students

You might be interested in
nother way to identify the domain and range of functions is by using graphs. Because the domain refers to the set of possible in
siniylev [52]

Answer:

x,y

Step-by-step explanation:

because it shows range and dange

6 0
3 years ago
A reflection across the x-axis keeps the x-coordinate the same but flips the y-coordinate. What do you think a reflection across
Studentka2010 [4]

Answer: A reflection across the x-axis keeps the x-coordinates the same but flips the signs of the y-coordinates. So, it should be the opposite for a reflection across the y-axis. The y-coordinates remain the same, but the signs of the x-coordinates change.

Step-by-step explanation

I copy and pasted the answer

8 0
3 years ago
Let a be an mn matrix, and let u and v be vectors in irn with the property that au = 0 and av = 0. explain why a(u + v) must be
tatiyna
\mathbf{Au}=\mathbf0
\mathbf{Av}=\mathbf0

\implies\mathbf{Au}+\mathbf{Av}=\mathbf0
\implies\mathbf A(\mathbf u+\mathbf v)=\mathbf0

Multiplying by scalars c,d won't change this fact.
4 0
4 years ago
The function h(x) has an x-intercept of 2 and a y-intercept of 8. what is the slope of h(x)
Mekhanik [1.2K]

Answer:

-4

Step-by-step explanation:

The slope of a function f(x) passing through two points of coordinates (x_1,y_1) and (x_2,y_2) is given by

m=\frac{y_2-y_1}{x_2-x_1}

Therefore, in order to find the slope of the function h(x) of this problem, we have to find the coordinates of 2 points.

We know that h(x) has an x-intercept of 2: the x-intercept is the point where the function crosses the x-axis, so the coordinates of this point are

(2,0)

Because at x = 2, the value of y is zero.

We also know that h(x) has an y-intercept of 8: the y-intercept is the point where the function crosses the y-axis, so the coordinates of this point are

(0,8)

Because at x = 0, the value of y is 8.

Therefore, we can now use these 2 points to calculate the slope of the function:

m=\frac{8-0}{0-2}=-4

6 0
3 years ago
The sum of the first 6 terms of a geometric series is 15,624 and the common ratio is 5. What is the first term of series?
Shalnov [3]

Answer:

<h2>4</h2>

Step-by-step explanation:

Suppose

  • S = sum of the six terms
  • a1 = the first term

\left. { S = a _ { 1 } \frac { 1 - 5 ^ { 6 } } { 1 - 5 } } \\\\ { \Leftrightarrow S = \frac { a _ { 1 } } { 4 } ( 5 ^ { 6 } - 1 ) } \\\\ { \Leftrightarrow a _ { 1 } = \frac { 4 S } { 5 ^ { 6 } - 1 } } \right.

then a1 = (4×15 624)÷(5^(6)-1)

            = 4

6 0
4 years ago
Other questions:
  • A gardener uses 1/3 of a liter of water to water 2/7 of a garden. Watering the entire garden at this rate will require _____ lit
    15·2 answers
  • I will mark Brainliest for the first to answer that is correct and only if they mark me brainliest for something. And five full
    8·1 answer
  • Mackenzie put $6,000.00 in a retirement account that offers 11% interest compounded annually. She makes no additional deposits o
    13·1 answer
  • Find the coordinates for the midpoint of with endpoints M(-3, 8) and 1(-7, 6)?
    5·1 answer
  • What is the equation of the graphed line written In
    10·1 answer
  • Simplify expression please thank you
    10·1 answer
  • Could someone help me?
    6·1 answer
  • Can i have help please​
    8·1 answer
  • F(x) = 3. 7 – 2x g(x) = 0. 25x – 5 What is f(x) g(x)? h(x) = 3. 95x – 7 h(x) = 8. 7 – 2. 25x h(x) = –1. 3 – 1. 75x h(x) = 3. 95
    8·1 answer
  • Type the correct answer in each box.
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!