Answer:
d 7(13)
Step-by-step explanation:
c) (2x3 + 5x2 - 4x – 5) ÷ (2x + 1) calculate using long division
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Raymond drove from San Antonio to Dallas in 5.2 Hours. It is 390miles from San Antonio to Dallas. If Raymond drove at a constant rate of speed, and did not stop on the trip, how fast was Raymond driving?
Answer:
75 mph
Step-by-step explanation:
The speed of Raymond from San Antonio to Dallas is given by S = 75 mph
What is Speed?Speed is defined as the rate of change of position of an object in any direction. Speed is measured as the ratio of distance to the time in which the distance was covered. Speed is a scalar quantity as it has only direction and no magnitude
Speed = Distance / Time
Given data ,
Let the speed of Raymond from San Antonio to Dallas be S
Let the distance between San Antonio to Dallas be represented as D
Now , the value of D = 390 miles
Let the time taken for Raymond to travel D miles be T = 5.2 hours
Now , the speed is = Distance / Time
On simplifying , we get
The speed of Raymond from San Antonio to Dallas S = D / T
The speed of Raymond from San Antonio to Dallas S = 390 / 5.2
The speed of Raymond from San Antonio to Dallas S = 75 mph
Hence , the speed is 75 miles per hour
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Find the slope of the line
y = 9/4x - 9/2
Answer:
The slope is 9/4.
Step-by-step explanation:
In the equation y=mx+b, the slope is m. In you're case, the m=9/4.
What postulate would you use to prove PQR TSR?
Answer:
SAS
Step-by-step explanation:
You have two pairs of congruent sides that are congruent.
The included angles are vertical angles, so they are congruent.
That means you have two sides and the included angle in each triangle.
Answer: SAS
Expand the expression.
t(–1.2w + 3)
Answer:
-2.5
Step-by-step explanation:
srry if I'm wrong...........
The expression t(–1.2w + 3) can be expanded as -1.2wt + 3t.
What is an expression?An algebraic expression in mathematics is an expression which is made up of variables and constants, along with algebraic operations (addition, subtraction, etc.). Expressions are made up of terms.
Given expression,
t (-1.2w + 3)
Using distributive property
-1.2wt + 3t
Hence, -1.2wt + 3t is the expanded form of the expression t(–1.2w + 3).
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A truck driver travels from a distributor to a retailer every week. The driver records the distance that he is from the retailer at dilferent
times during his trip. After several weeks of collecting data, the driver creates a scatter plot of the data. The best-fit line is y = 73.6 --
67.8x, where x is the number of hours spent driving and y is the distance, in miles, from the retailer.
Which of the following statements are true? Select all that apply.
The distance from the retailer decreases with time.
The distance from the retailer increases with time.
OOOOO
The distributor is 73.6 miles away from the retailer
The distributor is 678 miles away from the retailer
The truck is traveling at a rate of 67.8 miles per hour.
Answer:
B. The distance from the retailer decreases with time, D. The distributor is 73.6 miles away from the retailer, E. The truck is traveling at a rate of 67.8 miles per hour.
Answers: B, D, E.
Step-by-step explanation:
Is the sum positive negative or zero without adding -8+20
Answer:
positive
Step-by-step explanation:
-8+20 will have a positive sum because the positive number 20 is greater than the negative number 8
Answer:
Positive
Step-by-step explanation:
Without adding you can tell wether a number is positive or negative with addition because it is basically a number line. Think of subtracting -8 from 0 which would give you -8. Now add 20 to it causing it to get out of the negatives and become positive.
A cylinder has a height of 9 inches and a diameter of 12 inches. What is its volume?
Answer:
The volume of the cylinder is 4071.5
May I have brainliest please? :)
I WILL MARK U BRAINLIEST IF U DO THIS CORRECTLY!!!!!! ATTACHMENT BELOW
Answer:
210
Step-by-step explanation:
If each floor was 14 ft, and they want 15 floors, you would do 14 x 15, which equals 210
Which equation represents a line parallel to the x-axis
1 x=5
2 y=10
3 x=1/3y
4 y=5x +17
Answer:
4
Step-by-step explanation:
Answer:
The answer is 4
Step-by-step explanation:
please give me brianliest
Plz help I don’t under stand how to get this common ratio
Answer:
2 over 5
Step-by-step explanation:
Common ratio =
7/ (35/2) = (14/2) / 7
Our answer became 2/5
What is a fraction form of 1.40?
a linear graph passes through the point (6,4) and has a slope of 1/3 what is the x-intercept of the graph?
Answer:
74
Step-by-step explanation:
HELP PLZZZZZ ASAP
What is the new price of a clock that is on sale for 25% off the original price of $30.00?
$25.00
$22.50
$23.50
$7.50
Answer: $22.50
Step-by-step explanation:
25% of 30 = 7.5
30 - 7.5 = 22.50
Answer:
$22.50
Step-by-step explanation:
$30.00 x %25 or .25 = $7.50
$30.00 - $7.50 = $22.50
Helene invested a total of $1,750 in two simple-interest bank accounts. One account paid 4% annual interest; the other paid 6% annual interest. The total amount of interest she earned after 1 year was $82. Find the amount invested in each account.
Answer:
The amount invested in the account paid 4% is $1150
The amount invested in the account paid 6% is $600
Step-by-step explanation:
The rule of the simple interest is I = Prt, where
P is the amount investedr is the rate in decimalt is the time∵ Helene invested a total of $1,750 in two simple-interest bank accounts
∴ P1 + P2 = 1750 ⇒ (1)
∵ One account paid 4% annual interest
∴ r1 = 4% = 4/100 = 0.04
∵ The other paid 6% annual interest
∴ r2 = 6% = 6/100 = 0.06
∵ The total amount of interest she earned after 1 year was $82
∴ I1 + I2 = 82 ⇒ (2)
∵ t = 1
∵ I1 = P1 × (0.04) × 1
∴ I1 = 0.04 P1
∵ I2 = P2 × (0.06) × 1
∴ I2 = 0.06 P2
→ Substitute them in equation (2)
∴ 0.04 P1 + 0.06 P2 = 82 ⇒ (3)
Now we have a system of equations to solve it
→ Multiply equation (1) by -0.06 to make the coefficients of y equal in
values and different in signs to eliminate it
∵ -0.06(P1) + -0.06(P2) = -0.06(1750)
∴ -0.06 P1 + -0.06 P2 = -105 ⇒ (4)
→ Add equations (3) and (4)
∵ (0.04 P1 + -0.06 P2) + (0.06 P2 + -0.06 P2) = (82 + -105)
∴ -0.02 P1 + 0 P2 = -23
∴ -0.02 P1 = -23
→ Divide both sides by -0.02
∴ P1 = 1150
→ Substitute the value of P1 in equation (1) to find P2
∵ 1150 + P2 = 1750
→ Subtract both sides by 1150 to find P2
∴ P2 = 600
∴ The amount invested in the account paid 4% is $1150
∴ The amount invested in the account paid 6% is $600
What are the X and y intercepts?
Answer:
2,1
Step-by-step explanation:
Which of these prices is lower than 5 for $3.00?
12 for 7 dollars
8 for 5 dollars and 44 cents
6 for $3.72
7 for $4.06
(HELP TAKING A TEST)
Answer:
Sorry im not good at math
In Taxland, the first $20,000 of income is exempt from tax. There is a 12% tax rate on income between $20,000 and $50,000, and a 16% tax rate on all income over $50,000.
Mr. Taxi earns $90,000. His average tax rate is
and his marginal tax rate is
.
Write your answer as a percent with one decimal point: for example 2.6%
Answer:
16.0%
16.0%
Step-by-step explanation:
Given that :
First $20,000 is exempt from tax
$20000 to $50000 = 12% tax rate
Over $50000 = 16% tax rate
Earning = $90000
Since earning is greater than $50000
Tax rate = 16% = 0.16
Average tax rate = tax paid / taxable income
Tax paid = 0.16 * 90,000 = $14,400
Average tax rate = 14,400 / 90,000
Average tax rate = 0.16 = 16%
Marginal tax rate :
Change in tax paid / change in earning
Suppose ; amount earned increases to 95,000
Tax paid = 95000 * 0.16 = 15200
Change in tax paid = (15200 - 14400) = 800
Change in earning = 95000 - 90000 = 5000
= 800 / 5000
= 0.16 = 16%
Marginal tax rate = 16%
Subtract. Write the difference in simplest form.
(5n - 3) - (-2n + 7)
Answer:
Simplifying
(5n + -3) + -1(-2n + 7) = 0
Reorder the terms:
(-3 + 5n) + -1(-2n + 7) = 0
Remove parenthesis around (-3 + 5n)
-3 + 5n + -1(-2n + 7) = 0
Reorder the terms:
-3 + 5n + -1(7 + -2n) = 0
-3 + 5n + (7 * -1 + -2n * -1) = 0
-3 + 5n + (-7 + 2n) = 0
Reorder the terms:
-3 + -7 + 5n + 2n = 0
Combine like terms: -3 + -7 = -10
-10 + 5n + 2n = 0
Combine like terms: 5n + 2n = 7n
-10 + 7n = 0
Solving
-10 + 7n = 0
Solving for variable 'n'.
Move all terms containing n to the left, all other terms to the right.
Add '10' to each side of the equation.
-10 + 10 + 7n = 0 + 10
Combine like terms: -10 + 10 = 0
0 + 7n = 0 + 10
7n = 0 + 10
Combine like terms: 0 + 10 = 10
7n = 10
Divide each side by '7'.
n = 1.428571429
Simplifying
n = 1.428571429
Answer:
79-10
Step-by-step explanation:
Brainliest please.
Find two numbers the quotient is between. then estimate the quotient 41÷3
Answer:
25
Step-by-step explanation:
I'm not really good at math but I think 25 is the answe
Can you help me find x and y intercept?
I dont understand how to do it.
Answer:
The y-intercept is where the line crosses the y-axis, and the x-axis is where the line crosses the x-axis. For example, the y-intercept for Line A is 2 because it crosses the y-axis at (0,2) on the coordinate plane.
Step-by-step explanation:
Answer: y= 12 and x= is a value
Step-by-step explanation:
x=2+7=x
y= 7+5=y which is 12
What is the best estimate of the quotient of 118.6 ÷ 29
Answer:
4.1Step-by-step explanation:
The quotient id the output of the value when 29 is divided by 118.29
On dividing;
118.6/29 = 4 + {26/29}
4 + {26/29} = 4 + 0.08966
4 + 0.8966 = 4.08966
Hence the best estimate will be the estimate of the value to the nearest one decimal place and that is 4.1.
which points are separated by distance of 6 units?
A. (1,3) (6,3)
B. (7,2) (1,2)
C. (8,1) (1,1)
D. (5,6) (4,6)
which algebraic of an transformation on a coordinate grid does not preserve congruence
Answer:
rotation
Step-by-step explanation:
After constructing a confidence interval estimate for a population mean, you believe that the interval is useless because it is too wide. In order to correct this problem, you need to:_______.a. increase the population standard deviation b. increase the level of confidence c. increase the sample size d. increase the sample mean e, none of these would help
Answer: C. Increase the sample size
Step-by-step explanation: The confidence interval is a interval estimate of two numbers. From the question, the width confidence interval
Can be modified into a more narrow margin by reducing the standard error. The standard error is the value obtained from the division of standard deviation and the square root of sample size. Hence, a decrease in the standard error will give a more narrow confidence interval estimate. The standard error can be reduced by increasing the denominator of the standard error formula which is the sample size.
algebra 1 please help
Answer:
that seems hard
Step-by-step explanation:
i cant see the pic tho
Which is the best estimate for the percent equivalent to StartFraction 3 Over 8 EndFraction?
Answer:
The answer is 38%.
PLEASE HELP!
The half-life of a radioactive substance is 200 years. There are 8000 grams of the substance initially. How many grams of the substance are left after 300 years?
a) 5039.684g
b) 2828.427g
c) 3000g
d) 2000g
Answer:
B) 2828.427g
Step-by-step explanation:
Hope this helps!
Determine whether the statement is true or false. If it is false, rewrite it as a true statement. As the size of a sample increases, the mean of the distribution of sample means increases.
Answer:
False
-As the size of the sample increases, the mean of the distribution of sample doesn't change.
Step-by-step explanation:
From central limit theorem, as the size of a sample size increases, the sample mean and sample standard deviation will be far much more closer in value to the population mean(μ) and standard deviation(σ).
Thus, as the size of the sample increases, there will be no changes to the mean of the distribution of the sample mean.
Mike got 31 out of 50 for a test.
The pass mark is 60%.
Did Mike pass the test?
Answer:
Yes Mike passed the test.
Step-by-step explanation:
31/50 is equal to 62% which is higher than the needed mark to pass.
Answer:
Yes
Step-by-step explanation:
Change denominator to 100 by multiply both denominator and numerator by 2, so 31*2= 62, so he passed the test.