Ask question

Ask question

All categories

3 years ago

14

Worked Example: Simplify the expression 7x + 3 - 5x + 8 + 4x - 1.

2 answers:

Misha Larkins [42]3 years ago

8 0

Answer:

6x+10

Step-by-step explanation:

navik [9.2K]3 years ago

4 0

Answer:

6x+10

Step-by-step explanation:

7x+3-5x+8+4x-1

7x+4x-5x=6x

3+8-1=10

6x+10

You might be interested in

Scores from an exam are normally distributed with a mean of 85 and a standard deviation of 5. Suppose 188 students take the exam

charle [14.2K]

The mean is $\mu=85$ and standard deviation is $\sigma=5$ . Then the variable $X\sim N(85,5)$ .

Use substitution $Z=\dfrac{X-\mu}{\sigma}=\dfrac{X-85}{5}$ , then the variable $Z\sim N(0,1)$ .

The probability $Pr(X>80)$ can be calculated in the following way:

for X=80, $Z=\dfrac{80-85}{5} =-1$ and $Pr(X>80)=Pr(Z>-1)$ . From the diagram $Pr(Z>-1)=0.34+0.34+0.135+0.025=0.84$ .

Conclusion: if 188 students take the exam, then 188·0.84=157.92 (157) would receive a score above 80

4 0

3 years ago

Read 2 more answers

The sum of a number and forty-six

ad-work [718]

$\textsf{Hey there!}$

$\mathsf{\star \ The\ sum\ of\ a\ number\ \&\ forty-six}$

$\frak{Let's\ lable\ the\ keypoints\ so\ it\ can\ be\ easier\ to\ solve}$

$\bullet \ \textsf{The word \bf{\underline{SUM}}}\textsf{\ means\ add/addition}}$

$\bullet\textsf{ \underline{"A number"} is an unknown number so we can lable it as \bf{x}}$

$\bullet\textsf{ \underline{forty-six} is 46}$

$\textsf{The sum (+) does in the middle while \underline{x} \& \underline{46} will either be on left/right}$

$- \ \textsf{We can say that x is on your left}$

$-\ \textsf{ + can be in your middle}$

$- \ \textsf{\& lastly 46 can be on your right}$

$\boxed{\textsf{Thus, your answer SHOULD LOOK like: \boxed{\huge\text{\bf{x + 46}}}}}\checkmark$

$\textsf{Good luck on your assignment and enjoy your day!}$

~ $\frak{LoveYourselfFirst:)}$

4 0

3 years ago

Please look at the image below for the question.

zloy xaker [14]

The answer would be “stu”

8 0

2 years ago

What is the diameter of a cylinder whose volume is 211.75 cm2and height is22 cm

uysha [10]

Step-by-step explanation:

please mark me as brainlest

6 0

3 years ago

Am i right on this math problem?

Minchanka [31]

Answer:

Step-by-step explanation:

8 0

2 years ago

Read 2 more answers