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
Leto [7]
3 years ago
5

Write each missing number. 30+40=40+ _?​

Mathematics
2 answers:
FrozenT [24]3 years ago
4 0

Answer:

30

Step-by-step explanation:

kap26 [50]3 years ago
3 0

Answer:

30

Step-by-step explanation:

You might be interested in
Find the length of side AB<br> A) 15 units <br> B) 8.1 units<br> C) 4 units <br> D) 10 units
Ierofanga [76]
First, find the missing leg of ΔBCD (line BD). Using the Pythagorean Theorem, subtract (5^2)-(3^2) [25-9], and you get 16. Find the square root of 16, and you get <em>4</em> for line BD. Now, you can find AB. Add (7^2)+(4^2) [49+16], and you get 65. Now, since 65 isn't a perfect root, just use √(65)

Answer: Line AB equals √(65).
6 0
3 years ago
A music industry researcher wants to estimate, with a 90% confidence level, the proportion of young urban people (ages 21 to 35
Maslowich

Answer:

1,539

Step-by-step explanation:

Using Simple Random Sampling in an infinite population (this is such a large population that we do not know the exact number) we have that the sample size should be the nearest integer to

\large \frac{Z^2pq}{e^2}

where

<em>Z= the z-score corresponding to the confidence level, in this case 90%, so Z=1.645 (this means that the area under the Normal N(0,1) between [-1.645,1.645] is 90%=0.9) </em>

<em>p= the proportion of young urban people (ages 21 to 35 years) who go to at least 3 concerts a year= 35% = 0.35 </em>

<em>q = 1-p = 0.65 </em>

<em>e = the error proportion = 2% = 0.02 </em>

Making the calculations

\large \frac{Z^2pq}{e^2}=\frac{(1.645)^2*0.35*0.65}{(0.02)^2}=1,539.09

So, the sample size should be 1,539 young urban people (ages 21 to 35 years)

6 0
2 years ago
What is the distributive property of 55+66​
Bad White [126]

Answer:

Step-by-step explanation:

-11

8 0
3 years ago
For the graph shown select the phrase that best represents the given system of equations
Drupady [299]
<span>b) consistent and independent</span>
8 0
3 years ago
Hurry ill give brainiest if u help me
grin007 [14]
The y-intercept should be closer to ten. 
3 0
3 years ago
Read 2 more answers
Other questions:
  • The value of your EFG stock is three times the value of your PQR stock. If the total value of the stocks is $4500, how much is i
    14·1 answer
  • 2. Given the data 21, 13, 13, 37, 13, 23, 25, 15:
    10·1 answer
  • Help...... ASAP..........
    11·1 answer
  • The Hobbits are building a watchtower so they can prepare to battle in case trolls decide to attack them. One Hobbit will always
    12·1 answer
  • The probability of being struck by lightning is 0.00016. Find the odds against being struck by lightning
    14·1 answer
  • Points A and B are the ? of AB.
    6·1 answer
  • The sides of a hexagon are 2, 3, 2, 4, 7, and 6. Find the perimeter of a similar hexagon with two sides of length 3.
    13·1 answer
  • A gym teacher orders 42 tennis balls. Each package contains 3 tennis balls. Which of the following equations represents the numb
    9·1 answer
  • Find m<br> Please helppp !!
    7·1 answer
  • What is 7,459,82 rounded to the nearest whole number? (Remember : the whole number is in the ONES place)
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!