4.02 + 2/5 + 3 3/8 + 7.9 (HELP??)

Answers

Answer 1

Answer:

Answer:

15.695

Step-by-step explanation:

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Two standard number cubes are thrown simultaneously. What is the probability that the combined result of the two cubes is exactly 7, or that it is less than (but not equal to) 6? Round answer to the nearest thousandth. A. 0.444. B. 0.556. C. 0.667. D. 0.853
How many solutions does the following system of linear equations have? y=-6x+6 y=5x+1
I don’t know how to answer this
Solve for L.P = 2L + 2W

shannon walked 1 and 2/3 miles on Wednesday and 2 and 3/5mileson Thursday. What was the total distance, shannon walked during those 3 days? Could you also change it to kilometers

Answers

Total miles walked = 1 + 2/3 + 2 + 3/5
LCM: 15
(15+10+30+9)/15
64/15 miles
Shannon walked 64/15 miles. (4.266...miles)
Conversion into kilometres = 6.865..... (343/50 kilometres)

The variation of kernel color in corn plants is an inherited trait. R is the dominant allele for red kernels in a corn plant and r is the recessive allele for yellow kernels. What is the probability that a corn plant with the genotype Rr crossed with a corn plant rr will have offspring with the genotype rr? Express your answer as a fraction using numerals for numbers and / for the fraction bar.

Answers

The question ask to find the probability that a corn plant with the genotype Rr crossed with a corn plant rr and will have an offspring with the genotype rr. Base on the data, the possible probability would be 25% and base on the table or the cross breeding

Final answer:

The probability of having offspring with the genotype rr when a corn plant with the genotype Rr is crossed with a corn plant rr is 100%, or 1/1.

Explanation:

The probability of having offspring with the genotype rr when a corn plant with the genotype Rr is crossed with a corn plant rr can be determined using Punnett squares.

First, write the genotypes of the parents: Rr and rr.
Create a Punnett square by writing the alleles of one parent along the top and the alleles of the other parent along the side.
Fill in the boxes of the Punnett square with the possible combinations of alleles.
In this case, all the offspring will have the genotype rr, since r is the only allele from the second parent.

Therefore, the probability of having offspring with the genotype rr is 100%, or 1/1.

Learn more about Genetics here:

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2) A product originally costs $125. If the product goes on sale for 20% off, and then goes on sale for an additional 30% off, what is the price of the product? A. $62.50 B. $70 C. $65 D. $90 3) If you pay $22.90 for a DVD that includes a 7% sales tax, what is the price of the DVD before the sales tax? A. $21.40 B. $21.30 C. $21.50 D. $20.95

Answers

To do these, always convert the percents to decimals, so you can subtract it from 1. Remember, 1 is the whole. When you subtract the part that's taken off, you are left with what you have to pay. If you have 20% off of $100, then you are paying for 80% of $100. **of means to multiply** so you would multiply: 0.8X100, which would be $80.

First, multiply 125x0.8

Multiply that answer by 0.7

You should get B. $70

3) multiple 22.90x0.93

You should get D

2) B. $70
First you multiply 125 by 20%, but put the percent to a decimal then subtract and of the same with the 30% just add on to it

3) first you multiply 22.90 and .07 and add

The value of Jennifer's stock portfolio (in dollars) is given by the function f(t) = -3t +72t + 5000, where t is the time in months since she opened the account. After how many months will her portfolio be at a maximum? What is the maximum value of the portfolio?

Answers

Answer:

a) The portfolio will be at maximum after 12 months (1 year)

b) The maximum value of the portfolio is $5432

Step-by-step explanation:

The function that models Jennifer's stock portfolio (in dollars) is $f(t)=-3t^2+72t+5000$ , where t is the time in months since she opened the account.

We complete the square to obtain this function in vertex form:

Factor -3 from the first two terms

$f(t)=-3(t^2-24t)+5000$ .

Add the zero pairs -3(+144),-3(-144)

$f(t)=-3(t^2-24t+144)+5000+-3(-144)$ .

Factor the perfect square trinomial and simplify.

$f(t)=-3(t-12)^2+5432$ .

The vertex of this function is (h,k)=(12,5432)

a) The portfolio will be at maximum when t=12, the h-value of the vertex

b) The maximum value of the portfolio is the k-value of the vertex which is 5432

Translate the sentence into an equation.Nine times the sum of a number and 3 is 5.
Use the variable x for the unknown number.

Answers

Answer: 9 (3 + x) = 5

Step-by-step explanation: hope this helps

Answer:

9(X) x 3 =5

Step-by-step explanation:

Katie spent $465 on DVDs and CDs. The CDs cost $15 each, and the DVDs cost $19 each. A total of 27 CDs and DVDs were purchased. How many of each did she buy?(solve by substitution or elimination methods only)

Answers

Answer:

12 CDs and 15 DVDs

Step-by-step explanation:

Let

x----> the number of CDs

y---> the number of DVDs

we know that

x+y=27 -----> x=27-y ----> equation A

15x+19y=465 ----> equation B

Solve by substitution

substitute equation A in equation B and solve for y

15(27-y)+19y=465

405-15y+19y=465

4y=465-405

4y=60

y=15 DVDs

Find the value of x

x=27-y

x=27-15=12 CDs

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