Answer:
4x+8
Step-by-step explanation:
pls answer this question about math
Answer:
AB, AC, AD, BC, BD, CD
Hope this helps :)
Answer:
five line segment =AB,AC,AD,BC,BD,CD
A baseball is thrown in the air from center field to home plate. The path of the baseball is represented by the equation p(x)=−7x2+52x+99. How long will it take for the ball to get to home plate?
Tell me what steps went wrong as I solved this problem. Explain how to fix it.
Problem:
P(x) = -7x2 +52x+99
Step 1: -7x2 +52x+99 = 0
Step 2: a = -7 b = 52 c = 99
Step 3: −52±(52)2−4(−7)(99)√2(−7)
Step 4: −52±5476√14
Step 5:−52±7414
Step 6: x = 117 x = - 9
Answer: 117 seconds
Answer:
steps 3 went wrong
Step-by-step explanation:
the quadratic is
(-b +/- √ ( b^2 - 4ac) )/2a
-52 + √( 2704 +2772) /-14
-52 +74) / -14 = -22/14 = -11/7
-52 -74 / -14 = -126/-14 = 9
A consulting firm claimed that 65% of all e-commerce shoppers fail in their attempts to purchase merchandise on-line because Web sites are too complex. The claim was tested by taking a random sample of 60 online shoppers and assigning them each a different randomly selected e-commerce Web site to test. 45 reported sufficient frustration with their sites to deter making a purchase. The data was entered into STATISTIX and the following output was generated:
Hypothesis Test - One Proportion
Sample Size 60
Successes 45
Proportion 0.75000
Null Hypothesis: P = 0.65
Alternative Hyp: P > 0.65
Difference 0.10000
Standard Error 0.05590
Z (uncorrected) 1.62 P 0.0522
Method 95% Confidence Interval
Simple Asymptotic (0.64043, 0.85957)
Which of the following statements is correct if we are testing at α = 0.05?
a. There is sufficient evidence to indicate that more than 65% of all e-commerce shoppers fail in their attempts to purchase merchandise on-line because Web sites are too complex.
b. There is sufficient evidence to indicate that exactly 65% of all e-commerce shoppers fail in their attempts to purchase merchandise on-line because Web sites are too complex.
c. There is insufficient evidence to indicate that exactly 65% of all e-commerce shoppers fail in their attempts to purchase merchandise on-line because Web sites are too complex.
d. There is insufficient evidence to indicate that more than 65% of all e-commerce shoppers fail in their attempts to purchase merchandise on-line because Web sites are too complex.
Answer:
b. There is sufficient evidence to indicate that exactly 65% of all e-commerce shoppers fail in their attempts to purchase merchandise on-line because Web sites are too complex.
Step-by-step explanation:
Not significant,accept null hypothesis that population proportion = 0.65
When we accept the null hypothesis that P= 0.65
Then only option b is correct which states that there is sufficient evidence to support that population proportion is exactly 0.65 .
1) We obtain a P - value of 0.0522 which is greater than 0.5 indicating that the null hypothesis is not rejected.
The rejection region for this right-tailed test is z > 1.64
2) Test Statistics
z= p`-p0/ sqrt(p0(1-p0)/n)
The z-statistic is computed as follows:
z= 0.75-0.65/ √(0.65*0.35)60
z= 1.624
3) Decision about the null hypothesis
Since it is observed that z = 1.624 is less than z ∝=1.64, it is then the null hypothesis is not rejected.
Jason is laying out a square garden on his property. The space measures 46 feet diagonally. How long is each side of the garden?
PLEASEEE !!!
What is the measure of m?
n
20
m
5
m =
V[?]
Answer:
[tex] m = \sqrt{125} [/tex]
Step-by-step explanation:
By geometric mean property:
[tex] {n}^{2} = 5 \times 20 \\ {n}^{2} = 100 \\ \\ By \: Pythagoras \: Theorem \\ {m}^{2} = {n}^{2} + {5}^{2} \\ {m}^{2} = 100 + 25 \\ {m}^{2} = 125 \\ m = \sqrt{125} [/tex]
Please help!!! Please help me! This is due tomorrow and I really need some help! Thank you.
Answer:
ok i'll help u say thankyu to me!!!oshiee
Please help me I am struggling
Answer:
924
Step-by-step explanation:
i multiply 14 by 11 and then by 6
What is the correct factorization of x² - 2x - 15?
a. (x + 5)(x-3)
b. (x - 5) (x + 3)
C. (x + 5)(x + 3)
d. (x - 5)(x-3)
Find the area of the shape below
Answer:
2112
Step-by-step explanation:
100% sure
Mike wants to find the confidence interval for a set of data. He knows the sample size and the sample proportion. Which other piece of information does he need to determine the confidence interval?
A.
the critical value
B.
the number of favorable responses
C.
the standard error of the mean
D.
the standard deviation
Answer:
C. the standard error of the mean
Step-by-step explanation:
You need the sample mean, sample proportion , and the standard error which depend on z or t, sigma or s, and n
The Wells family uses up a
1
2
-gallon jug of milk every 3 days. At what rate do they drink milk?
Simplify your answer and write it as a proper fraction, mixed number, or whole number
Answer:
4 gallons/1 day
Step-by-step explanation:
What is a rate? A rate is writing a ratio in fraction form. A ratio is the proportion of two things. (ex: for every 1 dog, there are two cats.)
Creating the ratio: For the ratio, there is no given amount of which one needs to come first, but because it is about the milk, I put that first. In the problem it says 12 gallons for 3 days so: 12/3
Simplifying: To simplify, think of the largest factor between the two numbers. If you can't immediately, think of one factor in common and keep simplifying. In this case, 4 is the greatest common factor between these. To simplify, divide both sides by four, and that is your answer: 4: 1
How are theoretical probability and experimental probability related
Answer:
Experimental probability is the result of an experiment. Theoretical probability is what is expected to happen. Three students tossed a coin 50 times individually.
Step-by-step explanation:
Experimental probability is found through experiments while theoretical probability are not.
What is Probability?Probability is simply the possibility of getting an event. Or in other words, we are predicting the chance of getting an event.
Theoretical probability is the probability that we use normally which describes the percent or probability that an event is likely to happen. This is found using logic.
Experimental probability is the probability that we calculate through the actual experiments that describes the frequency of an event happening. This is found using experiments which are repeated.
They can be same, both of which describes the probability of happening an event.
Hence the experimental probability is found through experiments while theoretical probability are not.
Learn more about Probability here :
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Mike wants to find the confidence interval for a set of data. He knows the sample size and the sample proportion. Which other piece of information does he need to determine the confidence interval?
A.
the critical value
B.
the number of favorable responses
C.
the standard error of the mean
D.
the standard deviation
Answer:
A
Step-by-step explanation:
The other piece of information Mike needs to determine the confidence interval is the critical value.
What is a confidence interval?A confidence interval is a range of estimates for a variable that is uncertain. A confidence interval is calculated at a specified confidence level; the 95% confidence level is the most frequent, although other values, such as 90%or 99%, are also used.
To determine the confidence interval for a set of data sample size, the sample proportion, and the critical value are needed to be known.
Hence, the other piece of information Mike needs to determine the confidence interval is the critical value.
Learn more about Confidence Intervals:
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Please help me this is due in 20 minutes!!!!!!!
Answer:
The two triangles are very similar by them both having the same kind of angles even though they are different in size, like, an acute angle.
I'm not sure if this helped or not hopefully it did good luck.
XYZ is transformed on a coordinate plane to obtain its congruent image X'Y'Z. Which of the following statements could be true?
Answer:
The answer is D: only I and II
Step-by-step explanation:
I know for sure this is the correct answer. Hope this helped! Mark me Brainliest!
The true statements are X'Y'Z' becomes the translated image of the triangle XYZ. X'Y'Z' becomes the reflected image of the triangle XYZ.
What is the congruent triangle?Two triangles are said to be congruent if the length of the sides is equal, a measure of the angles are equal and they can be superimposed.
When XYZ is transformed on a coordinate plane to obtain its congruent image X'Y'Z.
X'Y'Z' becomes the translated image of the triangle XYZ.
X'Y'Z' becomes the reflected image of the triangle XYZ.
X'Y'Z' doesn't become the rotated image of the triangle XYZ.
Thus, Option I and II are true statements. so D is the correct answer.
Learn more about triangles;
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Please help I will give points
In MATHEMATICS ...write the empirical formula.
Answer:
3Median = Mode + 2Mean
Step-by-step explanation:
Nicholas is currently in eighth grade and intends to attend a state college when he finishes high school. Nicholas’s parents currently have some money invested in mutual funds, but would like to invest this money in a more secure investment now to pay for college in 4 years. If they will need $25,000, how much do Nicholas’s parents have to invest now in a 48month CD that has a rate of 4.59% compounded monthly?
Answer:
30027.86
Step-by-step explanation:
HELP PLEASE QUICK!!!!!
Answer:in what can I help
Step-by-step explanation:
There are only seven days left until we launch of our new product and we only have $668 left in our promotion budget we need to spend $85 on the last day can you please calculate how many dollars a day we can spin on the remaining days
Answer:
$97.17
Step-by-step explanation:
First, subtract 85 from 668:
668 - 85
= 583
This means that our budget for all of the days excluding the last day is $583
To find how much can be spent on the remaining days, divide 583 by 6:
583/6
= 97.17
So, approximately $97.17 can be spent on the remaining days
Use the multiplication principle to solve the problem.
A biologist is attempting to classify plant species by assigning 5 initials to each species. How many
classifications are possible using this method?
Can someone help me? Forgot how to do this, it’s been awhile
Answer: y=5
Step-by-step explanation:
Similar basically means it's the same shape but bigger. Condiering how 16-9=7 which means each side is 7 bigger than the original shape. You subtract 7 from 12(side y) to get 5
helpppppppppppppppppppppppppppp
For the triangles above, what is the measure of
Answer:
72
Step-by-step explanation
48 + k+l =180
48 +90+l =180
138 +l = 180
l=180 - 138
l = 42
now
l+m+n= 180
42 +m+66 =180
108+m= 180
m= 180 -108 m =72
Mark brainlest
Branliest to correct answer explain how you solved it please
Answer:
10.4
Step-by-step explanation:
look at the picture for steps
Can someone help for number 17 I’ll mark best answer!!!!!!!!!!!
9514 1404 393
Answer:
a) radius: 6 (m); mass: 22 (kg)
b) volume: 19 (m³)
c) d ≈ 2.8×10^3 kg/m³
Step-by-step explanation:
The order of magnitude is the exponent of 10 when the number is written in scientific notation.
a) radius: 1.6×10^6 m, so the order of magnitude is 6 when the units are meters.
mass: 4.8×10^22 kg, so the order of magnitude is 22 when the units are kg.
__
b) The volume is ...
V = (4/3)πr^3 ≈ 1.716×10^19 m^3, so the order of magnitude of the volume is 19 when the units are m^3.
__
c) The ratio of mass to volume is ...
d = (4.8×10^22)/(1.716×10^19) ≈ 2.8×10^(22-19) = 2.8×10^3 kg/m^3, so the order of magnitude is 3 when the units are kg/m^3.
How many solutions does this system of equations have?
Answer:
this equation will have 2 solutions
The Empire State Building is 1250 feet tall. Brock makes a scale model of the building at 1:250 of its actual size. How tall is the model?
Answer:
5 feet
Step-by-step explanation:
This is because we know that the ratio of his building to the empire state building is 1:250, and this ratio is equal to 5:1250, so we know that his model is 5 feet.
Answer:
1.3ft
Step-by-step explanation:
1;250 rounded is 1.3
Which is not a correct way to rewrite this expression using the distributive
property?
(2x2 + 4x - 7)(x - 2)
A. (2x2 + 4 – 7)(x) + (2x2 + 4x - 7)(x - 2)
B. (2x2)(x) + (2x2)(-2) + (4x)(x) + (4x)(-2) + (-7)(x) + (-7)(-2)
C. (2x2)(x - 2) + (4x)(x - 2) + (-7)(x - 2)
D. (2x2 + 4x - 7)(x) + (2x2 + 4x - 7)(-2)
Given:
The expression is
[tex](2x^2+4x-7)(x-2)[/tex]
To find:
The expression which is not a correct way to rewrite the given expression.
Solution:
We have,
[tex](2x^2+4x-7)(x-2)[/tex]
Using distributive property, we get
[tex]=(2x^2)(x-2)+(4x)(x-2)+(-7)(x-2)[/tex]
[tex]=(2x^2)(x)+(2x^2)(-2)+(4x)(x)+(4x)(-2)+(-7)(x)+(-7)(-2)[/tex]
Using distributive property the given expression can rewritten as:
[tex]=(2x^2+4x-7)(x)+(2x^2+4x-7)(-2)[/tex]
Only the expression in option A is not a correct way to rewrite the given expression because [tex](2x^2+4x-7)[/tex] is not distributed to [tex](x-2)[/tex] properly.
Therefore, the correct option is A.
im almost done with this hw. plz help!!! give explanation if you actually know the answer so ik u dont just want points
Answer:
C
Step-by-step explanation: