Solve this equation: 80 = 3y + 2y + 4 + 1. A. y = 15 B. y = 1/5 C. y = 75 D. y = –15I would like to double check my answer on this one can anyone help me out please thank you

Answers

Answer 1

Answer: 80 = 3y + 2y + 4 + 1

80 = 5y + 5
80 - 5 = 5y
75 = 5y
75/5 = y
15 = y

Answer is Choice A. y = 15

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-3x^2+4x+5 what are the step to finding this answer?

Answers

-3x^2+4x+5= 2x(2x+7)

Which phrase accurately describes a distribution that's bell-shaped but not symmetric?

Answers

A skewed distribution should be the right answer. It is a distribution that's bell-shaped but not symmetric. A skewed distribution do not have a symmetric appearance unlike a normal distribution. Skewness is the measure of the asymmetry.

Answer:

The answer is skewed distribution.

Step-by-step explanation:

Which phrase accurately describes a distribution that's bell-shaped but not symmetric?

Skewness is defined as asymmetry in a statistical distribution where the curve appears distorted or skewed either to the left or to the right, but not in the center.

When distributions possess a bell shape but is not centered, then they are called skewed distributions.

What is the mass of an object that weighs 7 kg and 50 N?

Answers

Answer:

7kg

Step-by-step explanation:

mass: amount of matter in a substance,

SI Unit: kg

It has nothing to do with N (weight) in this case so take the kg value as the mass

Answer:

0.71 kg

Step-by-step explanation:

a common equation in physics is w = mg

we can rearrange this to m = w/g

g is the acceleration of gravity: 9.81 m/s^2

w is the weight of the given equation of the object: 7 kg

so m = 7 kg ÷ 9.81 m/s^2

this gives us: m = 0.71 kg

Mike wants to buy a sleeping bag for a camping trip. He finds one that costs $52.75 with a 25% discount. How much will he pay for it?

Answers

If he gets a 25% discount, then he is basically buying the sleeping bag for 75% (75%=0.75) of the original price.

$52.75x0.75
=$39.5626
≈$39.56

(Since money only goes to the hundredths place it is rounded)

He will pay $39.56 for the sleeping bag.

52. 75 * 0.25 = 13.19
52.75 - 13.19 = $39.56 is the amount he will pay.

Two towns are 1,100 miles apart. A group of hikers Starts from each town and walks down the trail toward each other. They meet after a total hiking time of 240 hours. If one group travels 2 1/2 mile per hour slower than the other group, find the rate of each group.

Answers

Answer:

3.54 and 1.04

Step-by-step explanation:

Given:

Two towns are 1,100 miles apart.

A group of hikers Starts from each town and walks down the trail toward each other..

They meet after a total hiking time of 240 hours.

If one group travels 2 1/2 mile per hour slower than the other group.

Question asked:

Find the rate of each group.

Solution:

Let speed of faster hiker = $x\ mph$

Speed of slower hiker = $x-(5)/(2)\ mph$

As we know:

$Distance=speed* time$

Total distance between two town = Total combined speed of both hikers $*$ Total combined time taken

$1100=(x+x-(5)/(2) )*240\n \n Dividing\ both\ sides\ by\ 240\n \n 4.58=(x+x-(5)/(2) )\n \n 4.58=2x-(5)/(2) \n \nAdding\ both\ sides\ by\ (5)/(2) \n \n 4.58+ (5)/(2)=2x- (5)/(2)+ (5)/(2)\n \n (2*4.58+5)/(2) =2x\n \n (14.16)/(2) =2x\n \n By \ cross\ multiplication\n \n 2*2x=14.16\n \n 4x=14.16$

$By\ dividing\ both\ sides\ by \ 4\n \n x=3.54\ miles\ per\ hour$

Speed of faster hiker = $x\ mph$ = 3.54 miles per hour.

Speed of slower hiker = $x-(5)/(2)\ mph$ =

$3.54-(5)/(2) =3.54-2.5=1.04\ miles\ per\ hour$

Therefore, speed of faster hiker is 3.54 miles per hour and speed of slower hiker is 1.04 miles per hour.

Gender: Grade 9 Grade 10 Grade 11 Grade 12Male: 53 19 27 37

Female: 31 42 50 61

What percentage of females are in grades 11 and 12? Round to the nearest percent.

27%

35%

60%

67%

Answers

Answer:

Option C- 60%

Step-by-step explanation:

Given :

Gender : Grade 9 Grade 10 Grade 11 Grade 12

Male: 53 19 27 37

Female: 31 42 50 61

To find : Percentage of females are in grades 11 and 12

Solution: Total number of females= 31+42+50+61= 184

Number of females in grades 11 and 12 = 50+61 = 111

Percentage of females are in grade 11 and 12 = (No. of females in 11 and 12/total no. of females) × 100

$\Rightarrow (111)/(184)*100=(11100)/(184)=60.32$

Percentage is approx. = 60%

Therefore, option C is correct

There are 31+42+50+61=184 total females, and 50+61=111 females in grades 11 and 12, so the percentage is 111/184*100=60.33 percent, which can be rounded to 60%.

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