Answer:
3r+2s+8t+15
Step-by-step explanation:
After simplifying 7r+10-2(2r+3s-5t)+2(4s-t)+ 5, you will have 3r+2s+8t+15.
It is thought that not as many Americans buy presents to celebrate Valentine's Day anymore. A random sample of 40 Americans yielded 22 who bought their significant other a present and celebrated Valentine's Day. Estimate the true proportion of all Americans who celebrate Valentine's Day using a 98% confidence interval. Express the answer in the form the point estimates /- the margin of error.
Answer:
98% confidence interval of the true proportion of all Americans who celebrate Valentine's Day
(0.3672 , 0.7328)
Step-by-step explanation:
Explanation:-
Given Random sample size n =40
Sample proportion
[tex]p = \frac{x}{n} = \frac{22}{40} = 0.55[/tex]
98% confidence interval of the true proportion of all Americans who celebrate Valentine's Day
[tex](p-Z_{\alpha } \sqrt{\frac{pq}{n} } , p + Z_{\alpha } \sqrt{\frac{pq}{n} } )[/tex]
The Z-value Z₀.₉₈ = Z₀.₀₂ = 2.326
98% confidence interval of the true proportion of all Americans who celebrate Valentine's Day
[tex](0.55-2.326\sqrt{\frac{0.55 X0.45}{40} } , 0.55 + 2.326\sqrt{\frac{0.55 X0.45}{40} } )[/tex]
( 0.55 - 0.1828 , 0.55 + 0.1828)
(0.3672 , 0.7328)
Answer:
Step-by-step explanation:
98% confidence interval of the true proportion of all Americans who celebrate Valentine's Day
The Z-value Z₀.₉₈ = Z₀.₀₂ = 2.326
98% confidence interval of the true proportion of all Americans who celebrate Valentine's Day
( 0.55 - 0.1828 , 0.55 + 0.1828)
(0.3672 , 0.7328)
A. 3(x+2) = 18
T + 2 = 6
1) How can we get Equation B from Equation A?
Answer:
It's 4 I hope this helped.
If I subtracted 2 from 6 in Equation B. I would get 4. Putting 4 to replace the x in Equation A, it makes the equation make sense.
Step-by-step explanation:
3 ( 4 + 2 ) = 18
4 + 2 = 6
NEED HELP!!!!!!!!!!!!!
The answer to your question is DG.
12 + x - 8 = 3 + 2x
Solve for x
Step-by-step explanation:
I used an online Algebra Calculator to check my answer against to gurantee my answer is 100% correct for you.
Please mark Brainliest.
90 decimeters = _______________ millimeters
Answer:
900 millimeters
Step-by-step explanation:
Hopes this helps and have a great day:)
After school, Shawn had a science club meeting for 1 hour, followed by a choir rehearsal that lasted for 45 minutes. The choir rehearsal ended at 5:30 P.M. What time did the science club meeting begin?
Include A.M. or P.M. in your answer Please help me fast !!!
Answer:
3:45 P.M.
Step-by-step explanation:
SO we start at 5:30 P.M.
Going backwards 45 mins = 4:45 P.M.
Then backwards 1hr or 60 mins = 3:45 P.M
Which of the following ordered pairs corresponds to an arrow on a mapping diagram that starts at 4 and ends at 1?
O (1,1)
O (1.4)
0 (4,1)
O (4,4)
Answer:
it would be 4,1
Step-by-step explanation:
because its the only one that startes with 4 and ends with 1
Find -(-14).
—14
-4
4
14
Answer:
Step-by-step explanation:
minus in front of a minus=+
14
Answer:
D. 14
Step-by-step explanation:
Alexandra has 4 bags of beads. Some of the bags contain 3 purple beads and the rest contain 6 indigo beads. If Alexandra has 21 beads in all, how many bags of each color bead does Alexandra have?
Please help me fast!!
Answer:
4 bags of purple beads and 3 bags of indigo beads.
Step-by-step explanation:
Total number of beads = 21 beads'
Total bags of beads = 4 bags
Purple beads = 3 purple beads
Indigo beads = 6
Let x be each bags of purple beads
Let y be each bags of indigo beads
Since there are 4 bags of bead then;
x + y = 4 ....1
If some of the bags contain 3 purple beads and the rest contain 6 indigo beads, then;
3x + 6y = 21
x + 2y = 7.....2
Subtract 1 from 2
y - 2y = 4 - 7
-y = -3
y = 3
Sunce x + y =7
x = 7-y
x = 7-3
x = 4
Hence there are 4 bags of purple beads and 3 bags of indigo beads.
What is the reason for each step in the solution of the equation?
-6x = -2(a + 12)
Match the reason with the correct step in the equation.
a cinema has 240 seats. 144 seats were sold for the current movie. What percent of seats were empty?
Answer:
60%
Step-by-step explanation:
Four less than the product of 2 and a number is the same as negative eightteen. Find the number
Answer:
12
Step-by-step explanation:
4-2x=-18
-4 -4
-2x=-24
-2 -2
x=12
Describe how to add 3 2/5 and 1 1/5 and how to subtract them.
You are given two algebraic equations, y = 3x, and 2y = x + 20. Solve for x and y.
Answer:
x= -4 & y=-12
Step-by-step explanation:
multiply y=3x by 2
giving you 2y=6x
subtracting 2y=x+20 from 2y =6x
=> 5x=-20
dividing through by 5
=> x=-4
put x=-4 into y=3x
=> y=3(-4)
y=-12
Question in picture will give brainly
Answer:
Number 10. is SAS I believe
Step-by-step explanation:
Convert 33 feet per second to miles per hour. Round to the nearest tenth.
33 feet1 second = miles/hr
Answer:
about 22.5 mph
Step-by-step explanation:
for an approximate result, divide the speed value by 1.467
There are 5 cat owners to 6
dog owners. If there are 30 dog owners how many cat owners are there?
Answer:
25 cat owners!!!
Step-by-step explanation:
It's a ratio word problem...
5:6
Multiply both Numerator and Denominator by 5.
25:30
May I please have Brainliest??!??
- ElizabethKate
Answer: 19
Step-by-step explanation: So 6+5=11 then 30-11=19
can somebody please help me i’ll gift you 40 points
Answer:
B and D
Step-by-step explanation:
Answer:
B
Step-by-step explanation:
she got 35 is positive 35
she bought something for 15 and something for 7 is negative 15 and 7
she got 10 is positive 10
+35 + (-15) + (-7) + 10
35-15-7+10
I GIVE BRAINLIEST!
Explain your answer please!!
Answer:
y=3x-1
Step-by-step explanation:
First, we must find the slope of the equation. To do that we take two ordered pairs from the graph.
(2,5) (10,29)
The equation for slope is m=y2-y1/x2-x1
m=29-5/10-2
m=24/8
m=3
Now, we will find the variable B.
5=3(2)+b
5=6+b
-1=b
That's how we get the equation!
y=3x-1
Answer:y= 3x-1
Step-by-step explanation:
m= y2-y1/ x2-x1=
29-5/10-2=3
Now,use: y-y1= m(x-x1)
y-5=3( x-2)
y= 3x-1
Morgan's mom wants to borrow $720 to buy a new computer. The store will charge her 8% simple interest for one year. How much will she have to pay back if she pays the full amount in one year?
Answer:
$777.60
Step-by-step explanation:
8/100 = 0.08
0.08 * 720 = 57.6
57.6 + 720 = 777.6
Answer:
Step-by-step explanation:
8/100*720=5760/100
=$57.6
$720-$57.6=$662.4
she will pay back $662.4.
Is this the right answer
Answer:
yes that would be correct
Step-by-step explanation:
4 + 4 is 8
Enter a positive common factor (other than 1) of the fraction's numerator and
denominator.
9/21
You are Christmas shopping and your bill at the register is $130. You have two coupons, but you are only allowed to use one. Coupon 1 is for 10% off. Coupon 2 is for $10 off. Answer the following question 7a-7b-7c
Answer:
the answer is 10 percent off because that is 13 dollars
Step-by-step explanation:
if you do 130 times 10 it is 1300, then divide by 100 it equals 13 dollars off. if you did the other coupon it would only be 10 dollars off
I NEED HELP ASAP ITS FOR TODAY PLZ SHOW YOUR WORK
Answer:
(1)-5x (2)-3x and 0x
Step-by-step explanation:
(1) -7x-2y=5
-7x-12=5
(2) y=-8x+5=-3x
y=-5x+5=0x
He is pulling 400 feet over level ground by exerting a constant 25-pound force on the bar that makes an angle of 30° with the ground.
How much work is Thomas doing to pull the wagon?
10,000 foot-pounds
8,660 foot-pounds
7,070 foot-pounds
5,000 foot-pounds
Answer:
It’s b
Step-by-step explanation:
Answer:
B on edge
Step-by-step explanation:
The town of Euclid started a voluntary recycling program. The first year it was utilized by 1500 residents. Every year afterward, the number of new users was 120% of the new users the year before. After 6 years, how many people total were using the recycling program?
Answer:
170,070 residents
Step-by-step explanation:
Original population = 1500 residents
Total population after 6 years is calculated using the formula
A = P(1+r)^t
r is the rate = 120% = 1.2
t is the time = 6 years
P is the original population
A = 1500(1+1.2)^6
A = 1500(2.2)^6
A = 1500(113.379904)
A = 170,069.856
Hence the total people using the recycling program after 6 years is approximately 170,070 residents
can someone answer please I don't understand
Answer:
you just add X=8 to 5x-6
You always have to multiply it
so its 5•8-6= 34
Answer: The answer is 34
Step-by-step explanation: all you had to do was think all of the answers below are high numbers so you most likely had to multiply so i did 5x8-6=34
pls help im really dum
Answer:
1: h0m0zyg0us
2: 75%
3: 50%
Step-by-step explanation:
i think im not sure
-3x+2y=-17,-6x+3y=-30 using elimination
Answer:
x= 3, y= -4
Step-by-step explanation:
Jayson can make 4/5 of a 5 layers cake in 15 minutes. At this rate, how many cakes can Jayson make in 1 hour?
Answer:
3.2 cakes a hour
Step-by-step explanation: