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4 years ago

If you answer these trick questions I will give you brainliest. 2+2= 1+1= 3+3=

Mathematics

2 answers:

Gelneren [198K]4 years ago

5 0

Answer:

1. 4 2. 2 3. 6

Step-by-step explanation:

bazaltina [42]4 years ago

3 0

2+2= 22

1+1 = 11

3+3 = 33

( ꈍᴗꈍ)

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The average test score of the class was an 80 and the standard deviation was 2. About 99% of the class would score between what

Alisiya [41]

Answer:

Answer: 78 and 82.

Step-by-step explanation:

We have been given that the average test score of the class was an 80 and the standard deviation was 2. We are asked to find two values between which 68% of class will score.

We know that in a normal distribution approximately 68% of the data falls within one standard deviation of the mean.

So 68% scores will lie within one standard deviation below and above mean that is

Upon substituting our given values, we will get

Therefore, about 68% of the class would score between 78 and 81 and option B is the correct choice.

Step-by-step explanation: Hope this helps :D

5 0

3 years ago

Read 2 more answers

1)What is the mass of Nitrogen in NH3? (use two decimal places)

Mars2501 [29]

Answer:

1) The Mass of Nitrogen in $NH_3$ is 14.00 gm.

2) The Mass of Hydrogen in $NH_3$ is 3.00 gm.

3)The Molar Mass of $NH_3$ is 17.00 gm.

Step-by-step explanation:

Solving for Part 1.

In $NH_3$ that is Ammonia there is 1 atom of Nitrogen.

So the atomic mass of Nitrogen is same as the mass of Nitrogen in $NH_3$ .

Atomic mass of Nitrogen = 14.00 gm

Hence The Mass of Nitrogen in $NH_3$ is 14.00 gm.

Solving for Part 2.

In $NH_3$ there are 3 atoms of Hydrogen.

Atomic mass of Hydrogen = 1.00 gm

So the mass of Hydrogen in $NH_3$ is 3 times of its atomic mass.

Mass of Hydrogen = 3 × Atomic mass of Hydrogen

$Mass\ of\ Hydrogen =3\times1.00=3.00\ gm$

Hence The Mass of Hydrogen in $NH_3$ is 3.00 gm.

Solving for Part 3.

In $NH_3$ there is 1 atom Nitrogen and 3 atoms of Hydrogen.

So molar mass is the sum of mass of nitrogen and mass of Hydrogen in $NH_3$ .

Molar mass of $NH_3$ =Mass of Nitrogen+Mass of Hydrogen

$Molar\ mass\ of\ NH_3=14.00+3.00=17.00\ gm$

Hence The Molar Mass of $NH_3$ is 17.00 gm.

6 0

3 years ago

What is the value of x in 3x-9

julsineya [31]

Answer:

x could be anything. you have to have a equation to solve for x.

Step-by-step explanation:

7 0

3 years ago

Read 2 more answers

A coffee shop sells lattes for $4 and cappuccinos for $3. Last Friday, the sales totaled $252. If the number of lattes sold was

weeeeeb [17]

Answer:

$\large\boxed{\large\boxed{\text{54 lattes were sold}}}$

Explanation:

This is a typical problem to solve with a system of two linear equations.

1. Name the variables:

L: number of lattes

C: numberof cappuccinos

2. First equation:

Lattes for $4 ⇒ sale from L lattes = 4L

Cappuccinos for $3. ⇒ sale fro C cappuccinos = 3C

Last Friday, the sales totaled $252 ⇒ 4L + 3C = 252

First equation: 4L + 3C = 252

3. Second equation:

The number of lattes sold was 6 more than 4 times the number of cappuccinos ⇒L = 6 + 4C

Second equation: L = 6 + 4C

4. Solve the system:

Substitute L on the first equation with 6 + 4C

4 (6 + 4C) + 3C = 252

Solve:

Distributive property: 24 + 16C + 3C= 252

Add like terms: 24 + 19C = 252

Subtraction property of equalities: 19C = 252 - 24

Do the operation: 19C = 228

Division property of equalities: C = 228 / 19

Do the operation: C = 12

Subsitute C = 12 in L = 6 + 4C

L = 6 + 4(12) = 6+ 48 = 54

Answer: 54 lattes were sold

4 0

4 years ago

The average of 4,-8,6,14,-3 is

muminat

Answer:

c00chie man

Step-by-step explanation:

4 0

3 years ago

Read 2 more answers