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Alexxx [7]
3 years ago
6

Which statment is true

Mathematics
1 answer:
Paraphin [41]3 years ago
6 0
I think hamburger and French fries
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Z=5x-y solve for x plz help
pentagon [3]

Answer:

z+y/5=x or z/5 + y/5 = x

Step-by-step explanation:

z=5x-y

add y to both sides

z+y=5x

divide both sides by 5

z+y/5=x or z/5 + y/5 = x

5 0
3 years ago
Each side of a square is x meters long. Each side of the square is increased by 10%.
andrew-mc [135]
X=(44m÷4)÷110×100.......
8 0
3 years ago
The number of texts per day by students in a class is normally distributed with a 
kobusy [5.1K]

Answer:

1, 2, 6

Step-by-step explanation:

The z score shows by how many standard deviations the raw score is above or below the mean. The z score is given by:

z=\frac{x-\mu}{\sigma} \\\\where\ x=raw\ score,\mu=mean, \ \sigma=standard\ deviation

Given that mean (μ) = 130 texts, standard deviation (σ) = 20 texts

1) For x < 90:

z=\frac{x-\mu}{\sigma} \\\\z=\frac{90-130}{20} =-2

From the normal distribution table, P(x < 90) = P(z < -2) = 0.0228 = 2.28%

Option 1 is correct

2) For x > 130:

z=\frac{x-\mu}{\sigma} \\\\z=\frac{130-130}{20} =0

From the normal distribution table, P(x > 130) = P(z > 0) = 1 - P(z < 0) = 1 - 0.5 = 50%

Option 2 is correct

3) For x > 190:

z=\frac{x-\mu}{\sigma} \\\\z=\frac{190-130}{20} =3

From the normal distribution table, P(x > 3) = P(z > 3) = 1 - P(z < 3) = 1 - 0.9987 = 0.0013 = 0.13%

Option 3 is incorrect

4)  For x < 130:

z=\frac{x-\mu}{\sigma} \\\\z=\frac{130-130}{20} =0

For x > 100:

z=\frac{x-\mu}{\sigma} \\\\z=\frac{100-130}{20} =-1.5

From the normal table, P(100 < x < 130) = P(-1.5 < z < 0) = P(z < 0) - P(z < 1.5) = 0.5 - 0.0668 = 0.9332 = 93.32%

Option 4 is incorrect

5)  For x = 130:

z=\frac{x-\mu}{\sigma} \\\\z=\frac{130-130}{20} =0

Option 5 is incorrect

6)  For x = 130:

z=\frac{x-\mu}{\sigma} \\\\z=\frac{160-130}{20} =1.5

Since 1.5 is between 1 and 2, option 6 is correct

5 0
3 years ago
Triangle ADE is enlarged to form triangle ABC. What is the scale factor?
LekaFEV [45]
I need this answer to please when you get the answer will you let me know thank you!!
5 0
3 years ago
A rectangular swimming pool measures 14 feet by 30 feet. The pool is
Zolol [24]

Answer:

The total cost of resurface the path is \$600

Step-by-step explanation:

step 1

Find the area of the path

The area of the path is equal to the area of the path plus the swimming pool minus the area of the swimming pool

A=(14+3+3)(30+3+3)-(14)(30)

A=(20)(36)-(14)(30)

A=300\ ft^{2}

step 2

Find the cost of resurface the path

Multiply the area of the path by $2 per square foot

300*2=\$600

4 0
3 years ago
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