a)
Average price charged :
[tex]P=\dfrac{1.25+0.90+0.75+1.10}{4}\\\\P=\$1[/tex]
b)
Total income, T =$ 800×1.25 + 1600×0.90 + 2000×0.75 + 600×1.10
T = $4600 .
Total number of box, n = 800 + 1600 + 2000 + 600 = 5000.
Average price per box, [tex]A=\dfrac{4600}{5000}=\$0.92/box[/tex] .
Hence, this is the required solution.
The pH level of a substance can be determined by the formula pH = –log[H+], where [H+] is the hydrogen ion concentration in moles per liter. An alkaline substance has a pH level between 7 and 14. Which ion concentration corresponds to an alkaline substance?
3.5 x 10^-16
5.0 x 10^-12
1.0 x 10^-7
1.1 x 10^-4
Please answer asap
Answer:
B. 5.0 × 10⁻¹² moles per liter.
Step-by-step explanation:
In this exercise we have to calculate the pH levels associated with respective hydrogen ion concentration based on the following formula:
[tex]pH=-\log [H^{+}][/tex]
Where [tex][H^{+}][/tex] is the hydrogen ion concentration, measured in moles per liter.
a) 3.5 × 10⁻¹⁶ moles per liter:
[tex]pH=-\log [3.5\times 10^{-16}][/tex]
[tex]pH \approx 15.456[/tex]
The substance is above the upper bound for alkaline substances.
b) 5.0 × 10⁻¹² moles per liter:
[tex]pH=-\log [5.0\times 10^{-12}][/tex]
[tex]pH \approx 11.301[/tex]
The substance is alkaline.
c) 1.0 × 10⁻⁷ moles per liter:
[tex]pH=-\log [1.0\times 10^{-7}][/tex]
[tex]pH= 7[/tex]
The substance is not acid nor alkaline.
d) 1.1 × 10⁻⁴ moles per liter:
[tex]pH=-\log [1.1\times 10^{-4}][/tex]
[tex]pH \approx 3.959[/tex]
The substance is acid.
Thus, we concluded that correct answer is B.
Answer:
5 * 10^12
Step-by-step explanation:
Diane purchased a prepaid phone card for $15. Long distance calls cost 17 cents a minute using this card. Diane used her card only once to make a long distance call. If the remaining credit on her card is $11.26, how many minutes did her call last?
Answer:
22 minutes
Step-by-step explanation:
15-11.26=3.74
3.74 divided by .17 eqauls 22
Find the difference. The answer should be in simplest form.
−2/3 − 1/3 =
Answer:
-1
Step-by-step explanation:
-2/3 - 1/3
Since the denominators are the same, we can combine the numerators
-3/3
Simplify
-1
Line CD is the perpendicular bisector of segment AB. The lines intersect
at point E. Which of these statements is true?
(Hint: it may help to draw a picture, but you don't have to turn it in!)
There is not enough information to be sure.
O E is closer to A than to B.
O E is closer to B than to A.
O E is the same distance from A and B.
plz help me understand this
Answer:
E is the same distance from A and B. ⇒ D
Step-by-step explanation:
Let us explain the meaning of perpendicular bisector
If line m is the perpendicular bisector of line n, then
line m intersect line n at the mid-point of line nThey form 4 right angles around this mid-point∵ Line CD is the perpendicular bisector of segment AB
∴ Line CD intersects segment AB at the mid-point of AB
∵ Line CD and segment AB intersected at point E
→ That means E ∈ CD and E ∈ AB
∴ Point E is the mid-point of line AB
∴ Point E divides line AB into 2 equal parts
→ That means point E is at the same distance from points A and B
∴ E is the same distance from A and B.
what number has a place value of that is 100 times the place value of 6 in 2,386?
Answer:
3
Step-by-step explanation:
Move the decimal two to the right from the six, and you get 3 :)
Convert 6500 ounces to liters.
your answer is 192.23
Moving all the terms containing the unknown to the left of the equal sign and all other terns to the right of the equal
sign is called ___
terms
Answer:
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-3 1/6 ÷ 7 3/5. Explain each step you used to find the quotient
geometry helpffffffffffff
Answer:
x=-8
Step-by-step explanation:
First you should add 5x+67 and 5x+61 together which is 10x+128
Then you set that equal to 3x+72 which would be: 10x+128=3x+72
After that subtract 3x from both sides which leaves you with: 7x+128=72
Then subtract 128 from 72 which gives you: 7x=-56
Then divide by 7 which gives you x equals negative eight
What is the answer to 16> 1.5 + 0.8b
Answer:
16>2.3b
Step-by-step explanation:
1.5+0.8=2.3
Substitute b as 1. Which would still keep it as 2.3.
What should be done to solve the following equation?
b-4 = 10
Answer:
What I would do is to basically just find what b equals.
Evaluate when a = 15:
2(a - 5) + 2
Answer:
22
Step-by-step explanation:
Just plug in
2(15 - 5) + 2 (Solve what's in the parenthesis)
2(10) + 2 (multiply 2*10)
20 + 2 (collect like terms)
22
The evaluation of the expression, 2(a - 5) + 2 when a = 15 is; 22
According to the question;
We are required to evaluate 2(a - 5) + 2. when a = 15.To evaluate 2(a - 5) + 2. when a = 15.
We have;
= 2(15 - 5) + 2= 2(10) + 2= 22.Read more;
https://brainly.in/question/19225277
Rewrite the equation below so that it does not have fractions.
3/4x+5=5/6
Answer:
18x = -100 is the simplified form
Step-by-step explanation:
(3/4x) + 5 = (5/6)
3/4x (*24) + 5 (*24) = 5/6 (*24)
18x + 120 = 20
. Twelve coworkers go out for lunch together and order three pizzas. Each pizza is cut into eight slices. If each person gets the same number of slices, how many slices will each person get?
Answer: each person gets 2 slices of pizza
Step-by-step explanation: 3 pizza 8 slices each pizza 3•8=24 divided by 12=2
the quotient of a number and -2
what are the options
Answer:
It can be pretty much any number!Step-by-step explanation:
If you multiply any number to negative two, you can probably get anything! I don't know if this is your answer / question but I hope this helps! <3
Jasmine sold 30 bracelets on Monday and 15 bracelets a day for the next few days. She sold a total of 105 bracelets. Write an equation that can be solved to determine the number of additional days, d, she sold bracelets
Answer:
30 + 15d = 105, I think
Step-by-step explanation:
Help, please!! will mark brainliest
choose the graph that matches the following:
a
b
c
d
Explain how you can find the center of dilation of a triangle and its dilation.
Answer:
what is a dilation I dont really know waht they are
Step-by-step explanation:
IMMEDIATE HELP PLS HELP NOW
Answer:
D. y = { -x + 2 x ≥ 1}
{ x + 1 x < 1}
Step-by-step explanation:
First is to eliminate A and C, why?
This is because of the end points shown on the graph.
As shown, if you look at the point of (2,1) it is black, this means that not only is it closed but it is also means ≤ or ≥ symbol.
You are now left with B and D
The difference between these two is the symbols; they are facing the opposite directions.
While B says x ≤ 1, and x > 1
While D says x ≥ 1, and x < 1
The direction of the symbols depends on the direction of the lines and what is part of it (some what like a shaded area)
So you answer would be D
Which equation represents a line that passes through (-2, 3) and has a slope (m) of -4?
Answer:
Plug value of the slope and point (2,3) in y= mx+b
3.00 = -6 + b
b= 3 -6
b= 9
So the equation will be
Y =-3x+ 9
The model represents an equation. What value of x makes the equation true?
Answer:
x=3
Step-by-step explanation:
Okay so there are 5 small blocks! We need to get 11,but how? 5 + 6 equals eleven can we split 6 into 2? Yes we can. 6 divided by 2 equals 3 therefore our answer is the X represents 3, each tall shape is equivalent to 3 small shapes!
The equation 12x + 15y = 390 represents the total revenue during a one-day fundraiser. In the equation, x represents the
number of youth T-shirts sold, and y represents the number of adult T-shirts sold. If there were 10 youth T-shirts sold,
how many adult T-shirts were sold?
18 T-shirts
20 T-shirts
24 T-shirts
45 T-shirts
The cost to purchase a song from website 1 is $0.30 per song and a $5 membership fee. To purchase a song from website 2 there is a membership fee of $7 and each purchased song costs $0.20. How many downloaded songs, x, must be purchased for the two websites to be equal?
Answer:
I belive the answer is 20 songs.
Step-by-step explanation:
The equation you're looking for to solve this is
0.30x+5=0.20x+7
Then, you would solve for x in order to get 20.
William and his three friends had lunch at a restaurant. They split the bill equally. The total bill was $34. They left a 15% tip. How much would each person
pay
the perimeter of isoceles triangle is 60 cm and its base is 15 cm the area of triangle is?
Answer:
Step-by-step explanation:
2x+15=60(2x is written because there two parallel lines which not given)
2x=15-60
2x=-45
x=-45/2
that's the answer
please make me the brainlest thanks
i need to find the location of X
Answer:
-8
Step-by-step explanation:
midpoint = (W + X)/2
midpoint = [-11 + (-5)]/2
midpoint = -16/2
hence midpoint = -8
Choose the answer that correctly compares the two
8/9 87%
>,
Answer: 8/9 > 87%
Step-by-step explanation: 8/9 is greater because as a percent 8/9 is 88.888...%.
please help me it’s confusing
7. What is the average speed in km per hour of a car that
travels 956.4 km in 17 hours? Round your answer to the
nearest tenth.
HELP!
Answer:
136.6
Step-by-step explanation:
956.4/17 is 136.6
39y = 234
Which math process will most efficiently lead to solving the equation?
Add 39 to both sides of the equation.
Subtract 39 from both sides of the equation.
Multiply 39 to both sides of the equation.
Divide 39 to both sides of the equation.
Answer:
Divide by 39 on both sides
Step-by-step explanation:
y = 6
Answer:
Divide by 39 on both sides y=6