I NEED AN EXPLANATION!!!

Answer:

Step-by-step explanation:

5i ⋅i⋅(−2i)= −

10 ⋅ i2 ⋅ i= − 10 ⋅ (−1) ⋅ i = 10i

Answer:Second Graph

Step-by-step explanation:

Did it on Edge

Answer:

second graph

Step-by-step explanation:

Answer: It is B

Step-by-step explanation:

Just took the test

Answer:

10

Step-by-step explanation:

well you are multiplying -5 and -2. When multiplying two negative numbers you get a positive. 5x2= 10.

Answer:

cos.1.1k

Step-by-step explanation:

Answer:

A

Step-by-step explanation:

Step-by-step explanation:

i think its 24

sorry, if its wrong

42 is an integer, for me i can assume you asking about the additive opposite.

so, the answer is -42

Answer:

A) both expression involve addition

Answer:it’s D

Step-by-step explanation:

Answer:

all girls are the same bro

Step-by-step explanation:

Answer:

20

Step-by-step explanation:

An easy way is to just count the grids blocks, which are squares.

There are 18 of these.

For the rest, since they are in the shape of a triangle, they will count as a half grid block.

There are 4 of these, which are 4 halfs, which equal to 2 square blocks.

Add them, 18+2=20

Answer:

[tex]f(x)=\sqrt{\frac{1}{4x^2-3}}[/tex] for [tex](-\infty, -\sqrt {\frac 3 4 })[/tex] and [tex](\infty, \sqrt {\frac 3 4 })[/tex] .

Step-by-step explanation:

The given differential equation is [tex]\frac{dy}{dx}=-4xy^3[/tex]

Rearranging it as

[tex]y^{-3}dy=-4xdx \\\\\frac{y^{-3+1}}{-3+1}=-4\frac{x^2}{2}+C \\\\\frac{y^{-2}}{2}=4\frac{x^2}{2}+C \\\\y^{-2}=4x^2+C\cdots(i)[/tex]

where C is constant.

The initial condition is f(-1)=-1, i.e for x=-1, y=-1.

So, by using the initial condition to get the value of constant:

[tex](-1)^{-2}=4(-1)^2+C \\\\1=4+C \\\\C=1-4=-3[/tex]

From equation (i), we have

[tex]y^{-2}=4x^2+(-3) \\\\y^2=\frac{1}{4x^2-3} \\\\y=\sqrt{\frac{1}{4x^2-3}} \\\\[/tex]

As y=f(x), so the required particular solution

[tex]f(x)=\sqrt{\frac{1}{4x^2-3}}[/tex]

Now, determining the domain of the function

As for a real value output, the term under square root must be positive.

So,

[tex]\frac{1}{4x^2-3} >0 \\\\\Rightarrow 4x^2-3 >0 \\\\\Rightarrow x^2 > \frac 3 4 \\\\\Rightarrow |x|>\sqrt {\frac 3 4 } \\\\\Rightarrow x> \sqrt {\frac 3 4 } \; and \; x< -\sqrt {\frac 3 4 }[/tex]

Therefore, the domain of the function is

[tex](-\infty, -\sqrt {\frac 3 4 }) \;and\; (\infty, \sqrt {\frac 3 4 })[/tex]

Hence, [tex]f(x)=\sqrt{\frac{1}{4x^2-3}}[/tex] for [tex](-\infty, -\sqrt {\frac 3 4 })[/tex] and [tex](\infty, \sqrt {\frac 3 4 })[/tex] .

Answer:

y=-2/3x+3

Step-by-step explanation:

because -2/3 is the slope, y int 3

Answer:

0.74

Step-by-step explanation:

The middle age citizens are those in the age group of 18-55.

We solve this question using z score formula

z = (x-μ)/σ, where

x is the raw score

μ is the population mean

σ is the population standard deviation.

Mean 46 years

Standard deviation 13 years

For x = 18 years

z = 18 - 46/13

z = -2.15385

Probability value from Z-Table:

P(x = 18) = 0.015626

For x = 55 years

z = 55 - 46/13

= 0.69231

Probability value from Z-Table:

P(x = 55) = 0.75563

The probability that he/she is middle age is

P(x = 55) - P( x = 18)

= 0.75563 - 0.015626

= 0.740004

Approximately = 0.74

Answer:

20

Step-by-step explanation:

trust me.

Answer:

20

Step-by-step explanation:

The base square itself is 4 x 4 which is 16, then there are 4 halfs which makes 2 more and the other 2 in that 2 triangles so 20

Answer:

2 and 09 but if it's just one option, pick 2

Step-by-step explanation:

the others aren't rational i think

Answer:

\sigma_{k = 0}^6 (4+9k)

Step-by-step explanation:

notice that the sequence is

a(k)=4+9k

for k=0,1,...,6

Explanation:

There are 6 names in either circle A only, circle B only, or both circles (overlapped region)

The probability of getting someone in one of those circles, or both, is 6/9 = 2/3.

Answer:

base salary

Step-by-step explanation:

Answer: it would be the first option. they are both the first letters of their little cluster of letters (don't judge, i have no idea what it's called haha) and the rest of them do not match up. so, it is the first answer.

Answer:

answer: A

Step-by-step explanation:

They are all incorrect besides A

Answer:

a. 15L will last the cafe 3 days if they're using 4L every day

b. 15L will last them 7 days if they're using 2L every day

Step-by-step explanation:

division.

Answer:

I belive it would be D

Step-by-step explanation:

Answer: the decreases is 4% over 2% and the increase is thx for the points

Step-by-step explanation:

Answer:

Amy

Step-by-step explanation:

amy completed a longer distance in a shorter amount of time

rather than john completed a shorter distance in a longer time

Step-by-step explanation:

[tex]\qquad\quad {:}\leadsto\sf \dfrac {2x (x+7)}{\cancel{(x-3)}}\times {\dfrac {(x-9)\cancel{(x-3)}}{8x^2 (x+7)}}[/tex]

[tex]\qquad\quad {:}\leadsto\sf \dfrac {2x\cancel{(x+7)}}{x-3}\times {\dfrac {x-9}{8x^2 \cancel{(x+7)}}}[/tex]

[tex]\qquad\quad {:}\leadsto\sf \dfrac{2x (x-9)}{8x^2}[/tex]

[tex]\qquad\quad {:}\leadsto\sf \dfrac {\cancel{2x}^2-18x}{\cancel{8x}^2}[/tex]

[tex]\qquad\quad {:}\leadsto\sf \dfrac {18x}{4}[/tex]

[tex]\qquad\quad {:}\leadsto\sf \dfrac {9x}{2}[/tex]

[tex]\qquad\quad {:}\leadsto\sf 4.5x [/tex]

Answer:

Net Worth

Step-by-step explanation:

Answer:

x = 23 and y = 45

Step-by-step explanation:

x + y = 68

y = x + 22

substitute into your equation for x + y = 68

x + (x+22) = 68

combine like terms

2x + 22 = 68

2x = 46

x = 23

Now, use this to solve for y = x + 22

y = 23 + 22

y = 45

Answer:

The second option or B

Step-by-step explanation:

The approximate total mass= number of atoms * weight of an atom.

The approximate total mass=3.06 10²³ atoms. (1.67 10⁻²⁴ grams/1 atom)=

=0.51102 g ≈ 0.51 g

Answer: the approximate total mass is 0.51 grams.