All categories

3 years ago

Select all the correct answers.

Mathematics

2 answers:

Leokris [45]3 years ago

7 0

Answer: The last two are right

Step-by-step explanation: 75x5= $375, 75x3=$225, 75x4=$300.

Add all the sums together and you will get the cost of 75 bouquets, which is $900. - NUMBER 3

5+3+4=12, 12x75=$900

Sorry if I'm wrong first time doing this.

Snezhnost [94]3 years ago

3 0

Answer:

option (4) is correct. 75( 5r + 3d + 4f ) expression represents the cost for making 75 bouquets.

Step-by-step explanation:

Given: r is the cost of a rose, d is the cost of a daisy, and f is the cost of a bundle of green filler.

Terry uses 5 roses, 3 daisies, and 4 bundles of green filler to make one bouquet.

Thus, cost of one bouquet = cost of each flower used × number of flower used.

Total cost of one bouquet= 5r+3d+4f

Thus, cost for making 75 bouquets = 75 × cost of one bouquet

= 75( 5r + 3d + 4f )

Thus, option (4) is correct. 75( 5r + 3d + 4f ) is the correct expression to represents the cost for making 75 bouquets

You might be interested in

PLS HELP ASAP ITS IN 8 MINUTES ILL GIVE BRAINLKEST I PROMISW THANK YOU

inn [45]

Answer:

Step-by-step explanation:

The best way to solve this is to transfer -217 to the other side. So add 217 to both sides

0 ≤ 7 + 217 - 28v Combine

0 ≤ 224 - 28v Now add 28v to both sides

28v ≤ 224 Divide by 28

28v/28≤224/28

v ≤ 8

You should have 2 questions on your mind.

Why go to all the trouble of putting things on the opposite sides?
What is the answer

1. You so all that trouble so that you don't have to switch the < to >. As long as you have the letter and its coefficient > 0, then you are going to be right.

2. The is v is less than or equal to 8. That's C

5 0

3 years ago

PLS HELP ME ASAP FOR QUESTION 4!!! (MUST SHOW WORK!!) + LOTS OF POINTS!! *branliest*

algol13

No solution because if you distribute -4 to both 2.5y and -3.25 your equation becomes -10y+13-15 1/4=-10y. Then you subtract both 13 and 15 1/4 and get -2.25 so your equation becomes -10y-2.25=-10y. After that you add 10y to both side so your equation becomes -2.25=0 which has no solution.

4 0

4 years ago

Suppose the weights of tight ends in a football league are normally distributed such that σ2=400. A sample of 11 tight ends was

AlladinOne [14]

Answer:

$217.636-1.96\frac{20}{\sqrt{11}}=205.817$

$217.636+1.96\frac{20}{\sqrt{11}}=229.455$

So on this case the 95% confidence interval would be given by (205.82;229.46)

Step-by-step explanation:

Assuming the following data: Weight 150 169 170 196 200 218 219 262 269 270 271

Previous concepts

A confidence interval is "a range of values that’s likely to include a population value with a certain degree of confidence. It is often expressed a % whereby a population means lies between an upper and lower interval".

The margin of error is the range of values below and above the sample statistic in a confidence interval.

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".

$\bar X$ represent the sample mean for the sample

$\mu$ population mean (variable of interest)

$\sigma= \sqrt{400}= 20$ represent the population standard deviation

n=11 represent the sample size

Solution to the problem

The confidence interval for the mean is given by the following formula:

$\bar X \pm z_{\alpha/2}\frac{\sigma}{\sqrt{n}}$ (1)

In order to calculate the mean we can use the following formula:

$\bar X= \sum_{i=1}^n \frac{x_i}{n}$ (2)

The mean calculated for this case is $\bar X=217.636$

Since the Confidence is 0.95 or 95%, the value of $\alpha=0.05$ and $\alpha/2 =0.025$ , and we can use excel, a calculator or a table to find the critical value. The excel command would be: "=NORM.INV(0.025,0,1)".And we see that $z_{\alpha/2}=1.96$