Solve by substitution: y=3x and x+y=-32
Answers
Answer:
X=-8, y=-24
Step-by-step explanation:
Y=3x
x+y=-32
substitute value of y (3x) from first equation to the second equation
x+3x=-32
4x=-32
x=-8
solve for y by putting value of x (-8) into either equation
y=3x
y=3(-8)
y=-24
0r
x+y=32
-8+y=-32
y=-24
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|x − 5| − |2 − x| + |x + 1| , if x ≥ 5
Answers
Answer:
9990% 222$
Step-by-step explanation:
if you work it will help u head
Given the function h(n)= n squared - 1, find h(-4).
Answers
(-4)^2=16
16-1=15
h(-4)=15
Please help me with this ASAP ASAP please please help
Answers
Answer:
Step-by-step explanation:
Base perimeter : 4 x 2 x π = 8π cm
LA = 8π x 4 = 32π cm^2
Base area: 4^2 π = 16π cm^2
SA = 2 x 16π + 32 = 64π cm^2
V = 16π x 4 = 64π cm^3
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QUESTION 27
A research survey of 4750 adults found that 4275 had purchased something online of these shoppers, 789 are weekly online shoppers.
Construct a 99% Confidence interval estimate of the population proportion of adults who had purchased something online
A The Point Estimate equals 50.60
(Round to 1 decimal place)
B. The Standard Error equals 1243
(Round to 4 decimal places)
The Critical Value equals
(Round to 2 decimal places)
(Round to 4 decimal places)
D. The Margin of Error equals
and
E. & F. We are 99% confident the true proportion of adults who purchased something online is between
(Round to 4 decimal places)
Answers
Using the z-distribution, it is found that characteristics are:
a) 0.2
b) 0.0058
c) z = 2.575
d) 0.0149
e) (0.1851, 0.2149).
f) We are 99% confident the true proportion of adults who purchased something online is between 0.1851 and 0.2149.
Item a:
The point estimate is the sample proportion, hence:
[tex]\pi = \frac{789}{4750} = 0.2[/tex]
Item b:
The standard error is:
[tex]s = \sqrt{\frac{p(1 - p)}{n}} = \sqrt{\frac{0.2(0.8)}{4750}} = 0.0058[/tex]
Item c:
99% confidence level, hence[tex]\alpha = 0.99[/tex], z is the value of Z that has a p-value of [tex]\frac{1+0.99}{2} = 0.995[/tex], so [tex]z = 2.575[/tex].
Item d:
The margin of error is:
[tex]M = zs = 2.575(0.0058) = 0.0149[/tex]
Item e:
The interval is the point estimate plus/minus the margin of error, hence
[tex]\pi - M = 0.2 - 0.0149 = 0.1851[/tex]
[tex]\pi + M = 0.2 + 0.0149 = 0.2149[/tex]
The 99% confidence interval estimate of the population proportion of adults who had purchased something online is (0.1851, 0.2149).
Item f:
We are 99% confident the true proportion of adults who purchased something online is between 0.1851 and 0.2149.
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Please help me simplify this! Thank you so much!
Answers
Step-by-step explanation:
8∧-2 x (8∧2)∧3
=8∧-2 x 8∧6
=8∧(-2+6)
=8∧(4)
Find the areas of the trapezoids.
Answers
Answer:The top side is 5,the top is 2,the bottom side is 5,and the bottom is 5
Answer For the other shape:The top is 2,the bottom is 6,the left is 4,the right is 4
Step-by-step explanation:
How to solve this question
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Answer:
D) 60°
Step-by-step explanation:
Because TV and YZ are parallel, and TY and VZ are equal, angle T is equal to angle V. Also, Y and Z would each be 120°.
What is the value of x in the figure qor =65 and dot =70 ? Not at is a straight line
Answers
Answer:
its 65
Step-by-step explanation:
if you add it up u would see
Use your exponent rules to express as a single power, 9^4 ÷ 27^2
Make sure to do it step by step
Answers
Answer:
9
Step-by-step explanation:
9^4=3^8
27^2=3^6
when we divide the powers of the same base ,we take the common base and subtract their exponent.
3^8-^6
=3^2
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Find the area of the semicircle. Round your answer to the nearest hundredth. PLSSSSSSS!!!!!!!!!!!
Answers
Answer:
1.57 ft²
Step-by-step explanation:
Diameter = 2ft
Radius = 1/2 (diameter) = 1 ft
Area of semicircle = 1/2( πr²)
Area = 1/2 (3.14)(1)²
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56,095 to the nearest whole number
Answers
Answer:
56,000
Step-by-step explanation: the neareat whole number is 6000 so you yust take away the 96 and add two zeros
for the function f(x)=4/3x+8, what is the average rate of change over any given interval
a. 4
b. 3
c. 4/3
d. 3/4
Answers
Answer:
C i think i hope it helps
have a good night
-4(3x - 2x + 4y)
Simplify the expression
Answers
Answer:
− 4 x − 16 y
Step-by-step explanation:
Answer:
− 4 x − 16 y
Step-by-step explanation:
|y-x|, if y>x PLZ HELP
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Answer:
56tt8989899999999×-×554545--455356788:988
How do I get from step 2 to step 3?
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Answer:
do the floss
Step-by-step explanation:
But I really don’t know
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Answers
Answer:
a and b
Step-by-step explanation:
i think b i know a for sho
Answer:
32w+3
Step-by-step explanation:
8x4w=32w and you are left with the 3, so it ends up 32w+3
what is the fraction 7 x 1/4 = ____
Answers
7/1 x 1/4
= 7/4
Answer:
4/7 is the answer
Step-by-step explanation:
7 x ¼
=7/4
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Answer:
the answer would be Point F
Answer:
The answer is F
Step-by-step explanation:
I need the answer with justification please
Answers
The chance of getting an even number for 1 roll is 1/2 ( half the numbers are even.)
For 3 times in a row:
1/2 x 1/2 x 1/2 = 1/8
The answer is 1/8
Which graph shows a line with an x-intercept of (-4, 0) and a slope of −2/5
Answers
vzxxbxcbxvzbfdbnjdznvnjzkxnvjnjnjdb
lolhjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjodskvxhugvgxjchvgkzjgvcgkjzx
Pls help! Due soon. I will give brainiest *no links*
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Answer:
#2 a.
#3 c.
#4 a.
#5 c.
#6 b.
Plz help I’m down bad atm
Answers
Answer: Second option, 2^2x+6=2^6
Step-by-step explanation:
You can simplify 4^x+3 by making the 4 into 2^2. By doing this you also multiply the current powers of 4 by 2, giving you (x+3) • 2, furthermore, 2^2x+6.
64 is a power of 2, so just multiply 2 by itself until you get the number you’re looking for and count how many times you do it. Or just type each option, like 2^4, 2^6 into the calculator until you find it.
(40)
8. Use the information in the figure
below to answer questions a. and b.
70°
W
N
Х
35°
a. What is mZw?
b. What is mZz?
Answers
z= 55
for w take 90+35 then your answer minus 180 which would equal 55. w and y are vertical angles therefore you can add 55+70 and get 125, 180-125= 55, so 55 would be the answer for both w and z
Evaluate cos(60 degrees). Write your answer simplified, rationalized form.
Answers
Answer:
1 / 2
Step-by-step explanation:
Cos 60°
= 1 / 2
1 / 2 is the answe.
Add the fractions 3/14+15/21. Simplify your answer
Answers
The solution of fractions 3/14 + 15/21 is,
⇒ 3/14 + 15/21 = 39/42
We have to given that,
To add the fractions 3/14 and 15/21.
Now, We can add the fractions as,
⇒ 3/14 + 15/21
Since, LCM of 1 and 21 are 42.
Hence, Make the denominator same,
⇒ 9/42 + 30/42
⇒ (9 + 30) / 42
⇒ 39/42
Therefore, The solution of fractions 3/14 + 15/21 is,
3/14 + 15/21 = 39/42
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What is the positive solution to the equation 2x^2 = 72?
Answers
Answer:
x= 6
Step-by-step explanation:
6*6=36*2=72
x^2=36
x=±6
x=6
x=-6
PLEASE ANSWER FAST!!!
An object is launched vertically at a velocity of 160 feet per second from the top of a building 100 feet above the ground. Use the model h=-16t^2+vt+c where h is the height of the object at any time t, c is the initial height, in feet, of the object, t is the time in seconds and v is the velocity of the object.
How long will it take the object to reach the maximum height, and what is the maximum height?(Round to the nearest whole number)
Answers
Answer:
The question let's us set up the equation
Hope it helps!
Step-by-step explanation:
160= 16t^2+96t+16 and we just solve for t to get t= 3(sqrt 2 - 1) and -3(sqrt 2 - 1).
Hope it helps!
Help ASAP I’m so confused
Answers
Answer:
1) 0.1 unit
2) 0.1 unit²
3) 0.15 unit²
PLZ HELP DUE IN 45 MIN
If angle ABD is 125° and angle BAC is 40° what is the angle measurement of BCA?
Answers
Answer: C. 85
Step-by-step explanation: subtract 125 from 40
So angle BCA is 180-(55+40)=180-95=85
Surface area to volume ratio for a sphere