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3 years ago

What's 2+2 ? I have a hard time understanding what's the answer

Mathematics

2 answers:

madam [21]3 years ago

7 0

Answer:

2+2=4

Step-by-step explanation:

When adding 2 plus 2 you must add because + means adding when you add you get the sum of 4

Anarel [89]3 years ago

3 0

Answer:

Step-by-step explanation:

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X + 5y = -2

love history [14]

Answer:

Hey bestfriends..lol

Ima say the answer is....?!?!?!? B

Step-by-step explanation:

5 0

3 years ago

look at the figure shown below which step should be used to prove that point a is equidistant from points c and b

JulijaS [17]

D
is certainly wrong. You could extend the length of AD as far as you want and the two triangles (ABD and ACD) would still be congruent.

C
is wrong as well. The triangles might be similar, but they are more. They are congruent.

B
You don't have to prove that. It is given on the way the diagram is marked.

A
A is your answer. The two triangles are congruent by SAS

3 0

3 years ago

Simplify the expression with using scientific notation (4 times 10 8)2

kifflom [539]

The scientific notation:

$a\cdot10^n\\\\1\leq a < 10;\ n\in\mathbb{Z}$

$(4\cdot10^8)^2=4^2(10^8)^2=16\cdot10^{8\cdot2}=16\cdot10^{16}\\\\=1.6\cdot10\cdot10^{16}=1.6\cdot10^{17}$

Used:

$(a\cdot b)^n=a^n\cdot b^n\\\\(a^n)^m=a^{n\cdot m}\\\\a^n\cdot a=a^{n+1}$

Answer: (4 × 10⁸)² = 1.6 × 10¹⁷

8 0

3 years ago

If you had carried out the algebra using variables before plugging numbers into your expressions, you would have found that (vf)

SashulF [63]

Answer:

Step-by-step explanation:

Volt is energy per electric charge

$1V=1J/C$

and the energy units in terms of meters, seconds and kilograms are:

$1J= 1kg\frac{m^{2}}{s^{2}}$

So the unit of volt is

$1V= kg \frac{m^{2}}{Cs^{2}}$

So the velocity expression (it can not be read completly) but i guess that it could be as follows

$vf_{a} = -2\sqrt{\frac{q_{a}\Delta V}{m_{a}}}$

So the unit analysis would be

$vf_{a} = \sqrt{\frac{C kg\frac{m^{2}}{Cs^{2}}}{kg}}}$

note that the coulomb unit of numerator is cancelled from the denominator. The same occurs for kg unit.

$vf_{a} = \sqrt{\frac{m^{2}}{s^{2}}}$

Applying square root

$vf_{a} = \frac{m}{s}$

7 0

3 years ago

emma drives 1/4 of the way to work and uses 1/9 gallon of gas what fraction of the distance can she drive to work which one gall

gogolik [260]

This isn’t easy due to fractions but you just need to find a common denominator, what goes into 9 evenly and also goes into 4 evenly. 36 works and it is the lowest common denominator. What number multiplied by 9 gets you 36? (36/9) 4. So Emma uses 4/36ths of a gallon of gas to get 9/36ths of the way to work. So you take (4/36) or .25 and multiply that by 9 to get...

2.25 trips

3 0

3 years ago