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
Airida [17]
2 years ago
14

Riddle: Sonja discovered 2/5 of the pens she bought were not working. She also noticed 1/4 of the working pens were red. If 36 o

f the working pens were red, how many pens did Sonja buy?
Mathematics
1 answer:
Sav [38]2 years ago
4 0

Answer:

240 pens

Step-by-step explanation:

36*4=144

144/3=48

48=1/5 of pens

48*5=240

You might be interested in
Can I have help solving for x?:))
zvonat [6]

Answer:

24.8

Step-by-step explanation:

We will have to use trigonometry here to find the value of x. The first thing we can see is that we need to work out the hypotenuse. We need to chose whether to use Sin, Cos or Tan. We do that by look at the sides .

→ 'x' is the hypotenuse

→ 12 is opposite

→ The adjacent is the side that doesn't have a numerical value to we look for a formula triangle without adjacent in it

Tan = Opposite ÷ Adjacent

Sin = Opposite ÷ Hypotenuse

Cos = Adjacent ÷ Hypotenuse

We can see the Sin formula has no adjacent in it so we use that formula. However we want to work out the hypotenuse so we have to rearrange the sin formula to get hypotenuse as the subject so

Sin = Opposite ÷ Hypotenuse

Hypotenuse = Opposite ÷ Sin

→ Let's substitute in the values

Hypotenuse = 12 ÷ Sin(29)

Hypotenuse = 24.7519841

So the value of x is 24.8 to 1 decimal place

6 0
3 years ago
Read 2 more answers
Luiza is jumping on a trampoline.
lyudmila [28]

Answer:

The second time when Luiza reaches a height of 1.2 m = 2 08 s

Step-by-step explanation:

Complete Question

Luiza is jumping on a trampoline. Ht models her distance above the ground (in m) t seconds after she starts jumping. Here, the angle is entered in radians.

H(t) = -0.6 cos (2pi/2.5)t + 1.5.

What is the second time when Luiza reaches a height of 1.2 m? Round your final answer to the nearest hundredth of a second.

Solution

Luiza is jumping on trampolines and her height above the levelled ground at any time, t, is given as

H(t) = -0.6cos⁡(2π/2.5)t + 1.5

What is t when H = 1.2 m

1.2 = -0.6cos⁡(2π/2.5)t + 1.5

0.6cos⁡(2π/2.5)t = 1.2 - 1.5 = -0.3

Cos (2π/2.5)t = (0.3/0.6) = 0.5

Note that in radians,

Cos (π/3) = 0.5

This is the first time, the second time that cos θ = 0.5 is in the fourth quadrant,

Cos (5π/3) = 0.5

So,

Cos (2π/2.5)t = Cos (5π/3)

(2π/2.5)t = (5π/3)

(2/2.5) × t = (5/3)

t = (5/3) × (2.5/2) = 2.0833333 = 2.08 s to the neareast hundredth of a second.

Hope this Helps!!!

4 0
2 years ago
Evaluate the expression if a = 9 and b = 2. 5(a 3b) 20 51 70 75
devlian [24]
5(a + 3b) = 5(9 + 3(2)) = 5(9 + 6) = 5(15) = 75
5 0
3 years ago
Solve the equation. You may find using algebra tiles to be helpful.<br><br><br> 3n − 2 = 7
Marat540 [252]

Answer: i believe you're trying to find N, if so N=3

Step-by-step explanation:

you would start by adding +2 to each side of the equation, leaving you with 3n=9

you would then divide each side by 3, which gives you N=3

4 0
2 years ago
What is the value of x in the equation 2x+3y=36 wheh y=6
vova2212 [387]
X is 9
2x + 3y = 36 \\ 2x + 3(6) = 36 \\ 2x + 18 = 36 \\ 2x = 36 - 18 = 18
x =  \frac{18}{2}  = 9






good luck
4 0
3 years ago
Other questions:
  • During the last central high school basketball game, the starting five players scored 11, 7, 21, 14, and 7 points, respectively.
    10·1 answer
  • The square root of 6 is between which two integers?
    9·2 answers
  • What are the following solutions to the inequality -7x+14&gt;-3x-6 select all that apply
    7·1 answer
  • Give the digits in the hundred thousands place and the ten thousands place.<br> 175,384
    8·1 answer
  • What is the distance between the points (-5, -9) and (-5,14 )?
    11·1 answer
  • 2(x+4)=1/2(4x-4) answer and show work
    6·1 answer
  • What is the 5 ^ (th) term in the sequence ?
    9·1 answer
  • The mean,median and mode of these sets of data:<br>A:14,12,24,36,23​
    6·1 answer
  • What term is used to describe the study of using limited resources to fulfill wants and needs?
    15·2 answers
  • PLEASE HELP WILL MARK BRAINED!! THANK YOU!!
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!