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
daser333 [38]
4 years ago
9

In a survey of 400 students, 80% said they had math homework every night. Of these, 40% had writing homework every night. How ma

ny students had both math and writing every night?
A. 50
B. 128
C. 160
D. 320
Mathematics
1 answer:
natali 33 [55]4 years ago
7 0
It is D. 320 because if you add 80 and 40 togeter you get 120 then 320

You might be interested in
A hot air balloon gets loose from its anchor the balloon operator is look at the balloon at an angle of inclination of 34. If th
masha68 [24]

Answer:

horizontal distance = 74.13 ft

Step-by-step explanation:

In order to solve this problem, we can start by drawing what the situation looks like. (see attached picture)

As we can see in the picture, we can build a right triangle with the balloon and the operator. We can use a trigonometric function so solve this. Specifically the tan function. We know that:

tan \theta = \frac{opposite}{adjascent}

in this case:

tan \theta = \frac{h}{l}

so we need to figure out what l is equal to. We can solve this equation for l, so we get:

l=\frac{h}{tan \theta}

and substitute the values given by the problem, so we get:

l=\frac{50ft}{tan (30^{0})}

which yields:

l=74.13 ft

4 0
3 years ago
Which equation is the inverse of y = x2 – 36? y = plus-or-minus startroot x endroot 6 y = plus-or-minus startroot x 36 endroot y
svet-max [94.6K]

The inverse of the given function is expressed as y =  ±√x + 38

<h3>Inverse of an equation</h3>

Given the equation below expressed as:

y = x²  - 36

Replace y with x

x = y² - 38

Add 38 to both sides of the equation

x + 38 = y² - 38 + 38
y² = x + 38

Take the square root of both sides

√y² = ±√x + 38

y =  ±√x + 38

Hence the inverse of the given function is expressed as y =  ±√x + 38

Learn more on inverse of function here: brainly.com/question/3831584

#SPJ4

6 0
2 years ago
HELP PLS LAST ONE<br> Simplify (4y³ – 2y +9) − (2y³ − 3y² + 4y + 7).
Fynjy0 [20]
Simplifed: 2y^3+3y^2−6y+2
3 0
2 years ago
Is the following always sometimes or never true? 5(x+12)=5x+12
UkoKoshka [18]
It is never true

........
7 0
3 years ago
Hello,if anyone would help me,I would really much appreciate it. I’ve a little stressed about it.Thank you!
ira [324]
The answer is d. All ratios on the chart divide out to 3.5 as d does the same
4 0
3 years ago
Other questions:
  • Tony can carry up to 18 lb in her backpack her lunch weighs 1 lb her gym clothes weigh 2 lb and her book (b) weigh 3 lb each how
    15·1 answer
  • A garden is 53 feet long and 24 feet wide. how many square feet are in the garden?(set up an equation for this Problem but do no
    8·1 answer
  • Graph a line that is perpendicular to the line y = −3x + 2 and has a y-intercept of −6.
    11·1 answer
  • Which of the following values is between 10 and 11?
    6·1 answer
  • (-9) + 5 - 10 + 3<br> Does it equal 2? True or<br> False.
    7·2 answers
  • For a given arithmetic sequence, the first term, 47, is equal to 26, and the 37 th term, a37, is equal to 278. th Find the value
    9·1 answer
  • Need help asapppo please
    8·2 answers
  • Find the measure of <br> URGENT HELP NEEDED
    13·1 answer
  • Create an equation in point slope form of the following graph.
    11·1 answer
  • Hi whats the answer<br> √548
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!