Answers
Expand the left side:
(3x + 2) (5x + 1) = 15x² + 10x + 3x + 2 = 15x² + 13x + 2
Then a = 15 and b = 13, so a - b = 2.
Related Questions
If you know the ratio of 2 numbers and you want to find out what happens to the ratio if you increase one number, which operation should you use?
A) addition
B) division
C) multiplication
D) subtraction
Answers
Answer:
B) division
C) multiplication
Step-by-step explanation:
Ratios give the relation between two quantities.
For example, if two quantities A and B have a ratio of 1:3, it means that:
- for every quantity of A, B has three times more (multiply)
- for every quantity of B, A has three times less. (divide)
A new anxiety medication has been manufactured and a study is being conducted to determine whether its effectiveness depends on dose. When 40 milligrams of the medication was administered to a simple random sample (SRS) of 60 patients, 21 of them demonstrated lower stress levels. When 75 milligrams of the medication was administrated to another SRS of 85 patients, 34 of them demonstrated lower stress levels. Which of the following test statistics is an appropriate hypothesis test?
Answers
The test statistics is used to determine if the anxiety medication can happen under a null hypothesis
The test statistics that is an appropriate hypothesis test is [tex]z =\frac{0.35 - 0.40}{\sqrt{\frac{0.35(1 - 0.35)}{60} + \frac{0.40(1 - 0.40)}{85}}}[/tex]
How to determine the test statistic40 milligrams of medication
Patients = 60
Lower stress level patients = 21
The mean of this medication is:
[tex]\bar x = \frac{x}{n}[/tex]
So, we have:
[tex]\bar x_1 = \frac{21}{60}[/tex]
[tex]\bar x_1 = 0.35[/tex]
75 milligrams of medication
Patients = 85
Lower stress level patients = 34
The mean of this medication is:
[tex]\bar x = \frac{x}{n}[/tex]
So, we have:
[tex]\bar x_2 = \frac{34}{85}[/tex]
[tex]\bar x_2 =0.4[/tex]
The test statistic is then calculated as:
[tex]z =\frac{\bar x_1 - \bar x_2}{\sqrt{\frac{\bar x_1(1 - \bar x_1)}{n_1} + \frac{\bar x_2(1 - \bar x_2)}{n_2}}}[/tex]
The equation becomes
[tex]z =\frac{0.35 - 0.40}{\sqrt{\frac{0.35(1 - 0.35)}{60} + \frac{0.40(1 - 0.40)}{85}}}[/tex]
Hence, the test statistics that is an appropriate hypothesis test is [tex]z =\frac{0.35 - 0.40}{\sqrt{\frac{0.35(1 - 0.35)}{60} + \frac{0.40(1 - 0.40)}{85}}}[/tex]
Read more about test statistic at:
https://brainly.com/question/15980493
The answer is not B.
Ron takes 30 minutes to walk a distance of 1800 meters find the taken by Ron to walk a distance of 3000 meters
Answers
Answer:
50 minutes.
Step-by-step explanation:
We need to find how long it takes to walk 600 meters. We can do that by 1800/3 and 30/3 which comes out to 10 minutes every 600 meters. We can then just multiply 600*5 and 10*5 which gives us 3000 meters takes 50 minutes.
Please help me with question 44
Answers
Answer:
Answer is a
Step-by-step explanation:
I don't want to explain
Divida: 8519 ÷ 27 (Escriba su contestación expresando el cociente "R" (residuo) Ej. 15 R 4
Answers
Answer:
315.518518519
Step-by-step explanation:
27 goes into 8519 315 Tim Ed s
Please i need your help
Answers
Answer:
1. YES, BECAUSE WITH TAX, IT WOULD BE 9.88
2. MOVE THE DECIMAL OVER TO THE LEFT BY ONE PLACE
ANSWER IS 5.356
Step-by-step explanation:
IF TAX IS 13% YOU MULTIPLE 8.75 BY 1.13. YOU GET 1.13 FROM THE ORIGINAL PRICE PLUS .13 IN TAX.
A circular mirror is surrounded by a square metal frame. The radius of the mirror is 3x. The side length of the metal frame is 18x. What is the area of the metal
frarno?
Answers
Write the equation of a line in slope intercept
form of a line that has a slope of 2/3 and contains (-6,3)
Answers
Answer: y = (2/3)x + 7
Step-by-step explanation:
Slope intercept form is usually write as y = mx + b, where m is the slope, b is the y-intercept.
(-6,3): -6 is the x, 3 is the y.
To solve b, we plug in x, y and m into the equation:
y = mx + b
3 = (2/3)(-6) + b
3 = -4 + b
7 = b
Then we plug m and b in, we get:
y = mx + b
y = (2/3)x + 7
Which is true?
The number 100 is reduced by 30%. The number X is the result of that calculation increased by 30%. The number Y is equal to 100.
Which statement is true?
Answers
Answer: Your equation will look like this, where “N” is the number and “R” is the intermediate result
N−(N∗30/100)=R
R+(R∗50/100)=525
Simplifying and solving for R, we get:
R+0.5R=525 ← reducing 50/100
1.5R=525 ← combining R terms
R=350 ← dividing both sides by 1.5
Now, we need to solve for N:
N−0.3N=350 ← reducing 30/100
0.7N=350 ← combining N terms
N=500 ← dividing both sides by 0.7
hope this helps you
Find the value of x. 3) 2x (x + 21)
Answers
To find the x-intercept, substitute in
0
for
y
and solve for
x
. To find the y-intercept, substitute in
0
for
x
and solve for
y
.
x-intercept(s):
(
0
,
0
)
,
(
−
21
,
0
)
y-intercept(s):
(
0
,
0
)
5/6x-1/3=2x-5 solve for x
Answers
(5x-2)/6 - (2x-5) = 0
-7•(x-4)/6 = 0
x = 4
Examine the following typical corporate bond listing: Bonds Case Nat.Chg. 1 NYTel 7- 33 69 18 3 101 4 8 In the name column, NYTel is the abbreviated name of the company (New York Telephone) issuing the bond. What does the number 7, represent? interest or coupon rate b. maturity date of the bond C current yield of the bond d. the difference in price from the previous close
Answers
According to this typical corporate bond listing of New York Telephone, the number 7, represents A. interest or coupon rate.
What is a bond interest rate?The bond interest rate is the annual interest (coupon) rate paid on a bond.
The amount of interest is expressed as a percentage of the face value.
The bond interest (rate or amount) represents the periodic compensation that is due in exchange for the bondholder's agreement to lend their funds to the entity for some period.
Thus, the number 7, represents A. interest or coupon rate., not the maturity date, current yield, or the difference in price.
Learn more about bond interest rates at https://brainly.com/question/13990294
Answer: interest or coupon rate
Step-by-step explanation:
got 100% on the test
how do I put this in correctly
Answers
Answer:
to be honest I really don't know
= (1/4) (9^x / 4^x)
= (1/4) (9/4)^x
= (0.250)( 2.250)^x
Suppose that x is a differentiable function of t and that y=5x+4, then
dy/dt=
Use either dx/dt or x'(t) in your answer.
If dx/dt=6 when x=-2, then
dy/dt|x=-2=
Answers
Answer:
dy/dt = 30
Step-by-step explanation:
y = 5x + 4
dy/dx = 5
dy/dt = dy/dx * dx/dt = 5 * 6 = 30
Complete the table of values and sketch the graph of y = -3(2) x
Answers
— —
-2 12
-1 6
0 0
1 -6
2 -12
if 2 1/2 kg of biscuit cost $15 , find the cost of 2kg of biscuits
It is a easy question btw ;-;
Answers
Step-by-step explanation:
[tex]2 \times \dfrac{1}{2} \: kg \\ \\ = \frac{5}{2} kg \\ \\ = 2.5kg[/tex]kg of biscuit cost $ 15 .
We have been asked to find the cost of 2Kg of biscuits.
First Let's find the cost of 1Kg biscuit
[tex] \tt\implies \: cost \: of \: 1 \: kg \: biscuit \: = \dfrac{15}{2.5} \\ \\ \: \: \tt\implies \: cost \: of \: 1 \: kg \: biscuit \: = 6 \: dollar[/tex]
Then Cost of 2Kg biscuit would be
[tex] \tt\implies \: cost \: of \: 1kg \: biscuit \: = 2 \times 6 \\ \\ \tt\implies \: cost \: of \: 1kg \: biscuit \: = \: 12 \: dollar[/tex]
Hence, the cost of 2 kg biscuit is 12$ .
A pie is split into 3 equally sized
pieces.
Each piece has an area of 79 in?
What is the total area of the pie?
Answers
the total area of the pie is 237
Rita takes 3 h to type a report. What part of typing can she do in 2 h? in x h?
Answers
Answer:
Solution: Part = 2/3 part
Step-by-step explanation:
NO LINKS!! Please help me with this problem. Part 4.
Answers
===========================================================
Explanation:
The problem mentions "see the figure" but the figure above the text does not match the problem itself. I'm assuming the figure is shown below the given text, which unfortunately, is cut off from the screenshot.
The good news is that I think I can recreate what's being described. See the image below.
The things to focus on are the left-most and right-most triangles. We'll use the tangent ratio to help determine x and y. Afterward, compute x+y to get the total distance between the buildings.
First we have,
tan(angle) = opposite/adjacent
tan(32) = 500/x
x*tan(32) = 500
x = 500/tan(32)
x = 800.1673
Using similar steps, you should find that,
y = 500/tan(23)
y = 1177.9262
Therefore,
x+y = 800.1673+1177.9262
x+y = 1978.0935 feet is the approximate distance between Soldier Field and Adler Planetarium.
This is of course assuming that the diagram shown below matches with what your textbook has. Round the answer however you need.
A principal of $4800 is invested at 5.5% interest, compounded annually. How much will the investment be worth after 5 years?
Answers
Answer:
A = $6273.41
Step-by-step explanation:
[tex]\displaystyle A = P \big{(}1+ \frac{r}{n} \big{)} ^{nt}[/tex]
A = Amount of the investment in the futureP = Principal value (initial amount)r = Interest rate n = Number of times interest is compounded per yeart = Time (years)Substitute all of the known values into this equation.
[tex]\displaystyle A = 4800\big{(}1 + \frac{.055}{1}\big{)} ^{(1)(5)[/tex]
Solving for A in this equation gives us an answer of:
[tex]A = 6273.41[/tex]
Therefore, the investment will be worth $6273.41 after 5 years.
Marla’s mom bought a 36-pack of water bottles at the supermarket. Each bottle has 500 mL of water. How many liters of water is this?
1,800
36
18
3,6000
____________________________________________________________________8.
The best unit of measure for the liquid in a tea cup is the liter.
True
False
____________________________________________________________________10.
Every week, Marla’s mom buys 24 bottles of water that each have 16 oz. How many pints of water is this?
32 cups
12 cups
16 cups
24 pints
Answers
Answer:
See below.
Step-by-step explanation:
First one is 18 liters.
Second is false.
Third is 24 pints.
1) B.
2) A.
3) A.
4) True.
5) B.
-hope it helps
Answer:
18 liters, false, 24 pints
Step-by-step explanation:
Hope this helps
Write an expression for each of these situations. You can choose your own letters, but make sure you write what your letters represent.
The total cost of seven drinks and six bags of potato chips.
The total value of three rings is doubled.
Answers
Answer:
[tex]7d+6b[/tex]
[tex]6r[/tex]
Step-by-step explanation:
let [tex]d[/tex] be the cost of a drink
let [tex]b[/tex] be the cost of a bag of potato chips
and let [tex]r[/tex] be the cost of a ring
[tex]7d[/tex] is the cost of seven drinks
[tex]6b[/tex] is the cost of 6 bags of potato chips
so we add them together to get [tex]7d+6b[/tex]
[tex]3r[/tex] is the cost of three rings
[tex]2(3r)[/tex] is the cost of three rings but doubled
we can expand this to [tex]6r[/tex] which is the cost of 6 rings (or the cost of two rings but doubled)
I NEED HELP PLEASELELLSLLSKFOR SOM POINTS
Answers
Answer:
A
Step-by-step explanation:
Looking at the median data, there is a higher amount of people waiting in line for coffee on Wednesday, than there is on Sunday.
Brainliest if correct
Answers
Answer:
ok so 1/6 + 1/3, or 2/6 = 3/6 = 1/2
89divided by 5 I NEED HELP
Answers
Answer:
17.8
Step-by-step explanation:
What is the measure of angle y in this figure?
Answers
Step-by-step explanation:
180-163= 17
163+17=180
x and z = 17
y=163
8 1/3--(1/2x+1/3)
Simplify
Answers
Answer:
8-1/2x
Step-by-step explanation:
8 1/3 = 25/3
25/3 - 1/2x - 1/3
25/3 - 1/3 - 1/2x
24/3 - 1/2x
8 - 1/2x
Final Answer: 8 - 1/2x
Calculate greatest common divisor by step approach and reduce to lowest terms: 180/440
Answers
Answer:
the (GCF) greatest common factor is 20
Step-by-step explanation:
Answer:
divide both the numerator and denominator by the GCD .
440/20
180/20
reduced fraction : 22/9
therefore, 440/180 simplified to lowest terms is 22/9
Oxford backslap soaps a soaps Sox a
Answers
Answer:
what
Step-by-step explanation:
A gym employee is payed monthly. After working for 3 Months, he had earned $4,500. To determine how much money he will make over a six month period, he created the table below. After how many months will the gym employee have made $19,500?
Answers
Month 1 =1500
Month 2=3000
Month 3=4,500
Month 4=6000
Month 5=7500
Month 6=9000
After how many months will the gym employee have made 19,500 ? 19,500 divide by 1,500 (how much he earned in a month ) equals to 13. So he earned 19,500 during 13 months
Explanation : we know that he earned 4.5k for 3 months so we have to find out how much he earned in 1 month by dividing 4500 and 3 . 4500:3 = 1500 . To find how much he got in 2 months , we multiply 1500 by 2 . And so on