Answer:
54.928
Step-by-step explanation:
55 - .072=54.928
what is 25x + 17y - 3x - 2y equal to?
Answer:
22x+15y
Step-by-step explanation:
Answer choices
36
32
28
Please help due now
Answer:
36 it should be pretty easy but no problem
Mr. Allenby spent $34 for 6 movies. If each movie is the same price, how much would he have to spend for 24 movies?
Answer: I think it $136
Step-by-step explanation:
Answer:
$136
Step-by-step explanation:
If Mr. Allenby spent $34 on 6 movies we know that each movie costed roughly $5.67
(34 / 6 = 5.666...)
Knowing this we can multiply $5.67 by 24 which equals $136
(5.666... x 24 = 136)
If DE=6x what is the perimeter of the triangle in terms of x?
A 6
B 18
C 18x
Which rectangle represents dilation by a scale factor of 2 from the rectangle's center?
Answer:
it’s D
Step-by-step explanation:
I took the test
Solve for x.
−3(x+5)=−9
Answer:
x=-2
Step-by-step explanation:
Divide by -3 and solve for x
−3(x+5)/-3=−9/-3
x+5=3
x=3-5
x=-2
A researcher wants to estimate the percentage of all adults that have used the Internet to seek pre-purchase information in the past 30 days, with an allowable sampling error (E) of 0.03 and a confidence level of 99.74%. Of secondary data indicated that 25% of all adults had used the Internet for such a purpose, what is the sample size
Answer:
The sample size is 1875.
Step-by-step explanation:
In a sample with a number n of people surveyed with a probability of a success of [tex]\pi[/tex], and a confidence level of [tex]1-\alpha[/tex], we have the following confidence interval of proportions.
[tex]\pi \pm z\sqrt{\frac{\pi(1-\pi)}{n}}[/tex]
In which
z is the zscore that has a pvalue of [tex]1 - \frac{\alpha}{2}[/tex].
The margin of error is:
[tex]M = z\sqrt{\frac{\pi(1-\pi)}{n}}[/tex]
Sampling error of 0.03.
This means that [tex]M = 0.03[/tex]
99.74% confidence level
So [tex]\alpha = 0.0026[/tex], z is the value of Z that has a pvalue of [tex]1 - \frac{0.0026}{2} = 0.9987[/tex], so [tex]Z = 3[/tex].
25% of all adults had used the Internet for such a purpose
This means that [tex]\pi = 0.25[/tex]
What is the sample size
The sample size is n. So
[tex]M = z\sqrt{\frac{\pi(1-\pi)}{n}}[/tex]
[tex]0.03 = 3\sqrt{\frac{0.25*0.75}{n}}[/tex]
[tex]0.03\sqrt{n} = 3\sqrt{0.25*0.75}[/tex]
Simplifying by 0.03 both sides
[tex]\sqrt{n} = 100\sqrt{0.25*0.75}[/tex]
[tex](\sqrt{n})^2 = (100\sqrt{0.25*0.75})^2[/tex]
[tex]n = 1875[/tex]
The sample size is 1875.
-6z+(-5.5) + 3.5z + 5y - 2.5?
Answer:
-3.5z - 8 + 5y
Step-by-step explanation:
simplify -6z + -5.5 + 3.5z + 5y - 2.5
− 25z+5y−8
DIFFERENTIATE W.R.T. Z
−2.5
I need help on question 7 :)
Answer:
D
Step-by-step explanation:
is the only choice that actually helps in solving the equation
Answer:
D. Substitute -3x+4 in for y in the first equation.
can someone anwser this please:)
x^2 + 9x + 20
Answer: (x + 5) x (x +4)
step by step explanation: factor the expressions
How many solutions does x2 - 2x + 9 = 0 have and what type are they? Do NOT find the
actual solutions.
Answer:
3
Step-by-step explanation:
8th grade math, please help.
I’ll give you brainliest if you want.
-Find the volume-
*links are reported*
fractions 4/16 2/8 15/60 3/9 which fraction is not equivalent to 1/4
Answer:
3/9
Step-by-step explanation:
Help PLeasE HuRrY
Which shows 2 divided by 3 written as a fraction?
A. 2/3
B. 3 1/3
C. 3/2
D. 2 1/3
Answer:
A) 2/3
Step-by-step explanation:
Just write it how the questions says it 2/3. I hope this helps :)
Answer:
A. 2/3 uh welcome :-) :-) :-) :-) :-) :-) :-) :-) :-)
What is the median in the box plot?
50
60
70
80
90
100
Answer:75
Step-by-step explanation:
50,60,(70,80),90,100
70+80=150
150÷2=75
Therefore, 75is the median
3 units
8 units
9 units
3 units
21 units
The area of the figure is
square units.
What’s the answer
Answer:
132 Sq. Units
Step-by-step explanation:
What is the area? Write your answer as a fraction or as a whole or mixed number.
Answer:
81 or 20 1/4
Step-by-step explanation:
im not sure sorry
Answer:
[tex] \frac{1681}{4} [/tex]
or
[tex]105 \frac{1}{4} [/tex]
Step-by-step explanation:
[tex]10 \frac{ + 1}{ \times 4} [/tex]
10×4=40+1=41, that will be your numerator (number at the top of the fraction) and the denominator 4 will stay the same. (bottom number)
[tex] \frac{41}{4} [/tex]
the base and the height will remain the same.
Formula : base × height = Area
[tex] \frac{41}{4} \times \frac{41}{4} = \frac{1681}{16} [/tex]
16 goes into 1681 105 times remainder 1.
so as a mixed number it will be
[tex] 105 \frac{1}{4} [/tex]
Angel got 4 problems wrong on a test of 50 questions. What percent of the questions did he get CORRECT
Answer:
12.5%
Step-by-step explanation:
Answer:
92%
Step-by-step explanation:
50-4 = 46
46/50 *100 = 92%
Can someone help me with this problem number 4
Answer:
m = -11/7
Step-by-step explanation:
change equation into slope-intercept form:
7y = -11x + 2
y = -[tex]\frac{11}{7}[/tex]x + 2/7
slope is the coefficient of the 'x' term
Evaluate the expression if y=4.4 and z= 12
z2+ 8y
Answer: 59.2
Step-by-step explanation:
Take your equation
z2+8y
Now plug in the values given
(12)2+8(4.4)
24+35.2
59.2
write an equation in slope intercept form (4,-2) (0,-5)
Answer:
y=-7/4x+5
Step-by-step explanation:
The line contains points at (4,-2) and (0,-5)
(y1-y2) / (x1-x2) = slope
(4,-2) =(x1,y1)
(0,-5) = (x2,y2)
(-2-5) / (4-0)
-7 / 4 = -7/4
y= -7/4x + b
plug in points for x and y to find b
-2=-7/4(4)+b
-2=-7+b
5=b
y=-7/4x+5
Dad is getting food ready for my birthday party! Including me, there will be 10
people at the party, Dad is baking cupcakes for us! He can bake 8 cupcakes per
batch
How many batches should I tell Dad to make so we can each have 3 cupcakes?
There are 10 people and you want each of them to have 3 cupcakes. So multiply 10x3, which is 30. Then divide 30 by 8. You can't do that without a remainder though. So you round up to the nearest multiple of 8, which is 32. Then divide 32 by 8, which is 4. So tell dad to bake 4 batches, and the rest is for your dessert tomorrow.
---
hope it helps
PLEASE ANSWER ANY QUESTIONS ASAP THANK YOU SO MUCH
4.Rebecca biked 4.5 miles today and 3.2 miles
yesterday. If her goal for the week is 10 miles,
how much farther does she need to bike
Answer:
10-(4.5+3.2)
= 10-7.7
=2.3 miles
Write the equation of this circle in standard form.
Answer:
x² + y² = 16
Step-by-step explanation:
(x-h)² + (y-k)² = r² -- The standard form of equation of circle
(x-0)² + (y-0)² = 4²
3 7/10 + 5 3/4 + 3/4
Answer: 10.2 = 10 1/5
Step-by-step explanation:
A number is twice the other number. The sum of four times the smaller number and three times the larger number is 10. Find the numbers.
Please teach me how to do this. I'll give 90 points.
Answer:
1 and 2
Step-by-step explanation:
Let the first number be x
Let the other number be y
x = 2y.....eqn 1
From eqn 1, the smaller number is y while the bigger number is x.
3x + 4y = 10.... eqn 2
Substitute x = 2y into eqn 2
3(2y) + 4y = 10
6y + 4y = 10
10y = 10
Divide both sides by 10
y = 10/10
y = 1
Substitute y= 1 into eqn 1
x = 2y
x = 2(1)
x = 2
PLEASE ANSWER ASAP FOR BRAINLEST !!!!!!!!!!!!!!!!!!!!
Answer:
392
Step-by-step explanation:
distribute than combine like terms
8(3x+2y-7)+5(4x+8y-2)
THANK YOU
Put these numbers in order from least to greatest.
-13 4/20 13 18/36 12/40 4/20
Answer:
Step-by-step explanation:
-13, 4/20, 4/20, 12/40, 13, 18/40 i think
Answer:
-13 < 4/20 = 4/20 < 12/40 < 18/36 < 13
Step-by-step explanation: