Answer:
$3.50
Step-by-step explanation:
Given that the cost of 3 pencils and 2 markers is $1.30. Let the cost of a pencil be $p and that of a marker be $m then
3p + 2m = 1.30
Also, the cost of 2 pencils and 3 markers is $1.20 will result
2p + 3m = 1.20
Solve both simultaneously
3p + 2m = 1.30
2p + 3m = 1.20
multiply the first by 2 and the second by 3
6p + 4m = 2.60
6p + 9m = 3.60
subtract the second from the first
4m - 9m = 2.60 - 3.60
-5m = -1
Divide both sides by -5
m = 0.20
substitute into equation 1
3p + 2(0.2) = 1.30
3p + 0.4 = 1.30
3p = 1.30 - 0.40
3p = 0.90
Divide both sides by 3
p = 0.30
The total cost of 7 pencils and 7 markers
= 0.30 * 7 + 0.20 * 7
= 2.10 + 1.40
= $3.50
Element X decays radioactively with a half life of 9 minutes. If there are 760 grams of Element X, how long, to the nearest tenth of a minute, would it take the element to decay to 19 grams?
Answer:
Step-by-step explanation:
760·0.5^(t/9) = 19
0.5^(t/9) = 19/760
2^(-t/9) = 0.025
-t/9 = log₂(0.025)
t = -9log₂(0.025) = 47.9 minutes
Answer:
47.9 minutes
Step-by-step explanation:
Joshua wants to buy sport shoe cost P435.30 if he saved from his allowance a total of P289.75 how much does he still need to buy the shoe
Answer:
P 145.55
Step-by-step explanation:
435.30 - 289.75 = 145 .55
Evaluate the expression of Pg +12 when p=7 and g =-3
Answer:
-9
Step-by-step explanation:
(7)(-3)+12
-21+12
-9
Answer:
-9
General Formulas and Concepts:
Pre-Algebra
Order of Operations: BPEMDAS
Brackets Parenthesis Exponents Multiplication Division Addition Subtraction Left to RightStep-by-step explanation:
Step 1: Define
pg + 12
p = 7
g = -3
Step 2: Evaluate
Substitute in variables: 7(-3) + 12Multiply: -21 + 12Add: -9Fill in the missing numbers to write an equation for each linear table. Helppp please
A full-time employee who works 40 hours per week earns $27.50 per hour. Estimate that person's income. Round 52 weeks to 50 weeks per year, and round the hourly wage to the nearest dollar for the estimate. what is the estimated of annual income?
fifty five thousand 55,000
PLEASE HELP
The value of Amy's car depreciated each year after she bought it. The function v(t) = 24, 893(0.88) represents the value of Amy's car t years after she bought it. What is the rate of depreciation?
Answer:
12%
Step-by-step explanation:
1 - 0.88= 0.12 x 100 = 12
R
135
Р
S
Given isosceles trapezoid PQRS.
what are the measures of angles P. Q, S?
Answer:
huushshsusjvevshshd
Step-by-step explanation:
q=135 s and p= 45
hi can you please help me with my work
Answer:
The answer is 3 1/2 inches!
Step-by-step explanation:
Calculate what is 365 {365- (365: (365+365)}}?
Step-by-step explanation:
365{365-(365:(365+365)}}
= 365{365-(365:730)}
= 365{365-0.5}
= 365{364.5}
= 133,042.5
Determine whether the given value is a statistic or parameter a survey found at 97% of all respondents have jobs
Answer:
b) The value is a statistic because it is a numerical measurement describing some characteristic of a sample
pls help quickly maath
Answer:
It should be A
Step-by-step explanation:
Since it is asking for the squares to circles, it is not option c. B is also incorrect because the ratio is not correct, which leaves the only answer to be A.
Jonathan has 3 1/3 yards of fabric. He cuts it into strips to wax his car. Each strip is 5/6 yards long. How many strips of fabric does he have?
24 - 3x Evaluate each expression if x = 5
Answer:
9
Step-by-step explanation:
24 - 3(5)
24 - 15
9
good luck, i hope this helps :)
Lillian drew a design inside a circle.
Which measurement is closest to the
circumference of the circle?
F 25 cm H 50 cm
G 40 cm
J 32 cm
Answer:
H (50cm)
Step-by-step explanation:
Since 8 is the radius, 16 is the diameter. The formula for the circumference of a circle is diameter times pi, so 16pi is around 50
Question 15
Tessa made 14 out of 22 free throw attempts in the first half of practice and 22 out of 28 attempts in the second half of practice. What is her free throw average for the whole practice, written as a decimal? PLEASE HELP, I NEED IT QUICK!! 30 POINTS FOR IT
Answer:
0.71
Step-by-step explanation:
1st attempt = [tex]\frac{14}{22} = 63%[/tex]%
2nd attempt = [tex]\frac{22}{28} = 79%[/tex]%
To get the average of something, find the sum of the numbers and then divided the sum by the total number of values there are.
⇒ 63 + 79 = 142
⇒ 142 / 2 = 71%
⇒ 71% = .71
It takes Naomi 4 minutes to run 5 laps.
How many minutes per lap is that?
And remember is minutes per lap please do it fast
Answer:48 seconds per lap
Step-by-step explanation: 60 seconds per minute x 4 minutes= 240 seconds per lap. 240 seconds divided into 5 laps is 48 seconds per lap
WHAT IS 1/2 + 3/4 PLZ ANSWER REALLY REALLY URGENT!!!!!!!!!!!!!
Answer: it is 1.25
hope i helped
Answer:
1.25
Step-by-step explanation:
yeah
Find the surface area of this rectangular prism: Don't forget to show the unit of measure.
Answer:
jejdujehehtjejehevgshfjrjehrhdb
Step-by-step explanation:
jsjdrbhrry4hebzbs d rhyeush r dbru4hu4 dbb
0.05 is blank of 0.5
0.05 × 10 = 0.5
PLEASE MARK ME AS BRAINLIEST
The decimal 0.05 is 10 times the decimal number 0.5.
What is a decimal number?The accepted method for representing both integer and non-integer numbers is the decimal numeral system. Decimal notation is the term used to describe the method of representing numbers in the decimal system.
A number is a numerical unit of measurement and labeling in mathematics. The first examples are the numbers 1, 2, 3, and 4.
The given decimals are 0.05 and 0.5. The expression will be solved as below:-
When the number 0.05 is multiplied by 10 then it will become 0.5.
0.05 x 10 = 0.5
Therefore, the decimal 0.05 is 10 times the decimal number 0.5.
To know more about decimal numbers follow
https://brainly.com/question/1827193
#SPJ2
give an example of two or more like terms
Answer:
2x + 3x
3x + 10x
Step-by-step explanation:
like Terms are individual terms that have the same variable in them
The question is: find the value of that makes || . State the converse that justifies your answer.
Answer:
ответ вводит в заблуждение
hiii , does anyone know with work? thank you
Answer:
3√41
Step-by-step explanation:
The diagonal can be gotten using the pythagoras theorem
d² = l²+w²
d² = 12²+15²
d² = 144 + 225
d² = 369
d = √9*41
d = 3√41
Hence the diagonal is 3√41
Help me people u r my only hope!
Choose all of the values that are equivalent to -(1/3)
A. -1/3.
B. 1/-3
C. -1/-3
D. 1/3
E. -(-1/3)
Answer:
D)1/3 ?
Step-by-step explanation:
Maybe 1/3
Do some research, I guess it's D).
I hope that helps (:
1. The entire fraction is negative if the numerator or denominator are negative.
if both parts of the fraction were negative, the entire fraction would be positive (- / - = +)
2. Of course, although most teachers ask you to put the negative sign in the fraction as a whole (before the fraction line) or in the numerator. never leave a fraction with two signs. in this case, if it has two signs and they are different, the whole fraction is NEGATIVE
3) No. the whole fraction is POSITIVE only if both the numerator and the denominator have the same sign, + + or - -
Help and explain
Don’t use for points or I will take it back
Step-by-step explanation:
step 1. x + 51 + 39 + 127 = 360 (1 revolution is 360°)
step 2. x + 90 + 127 = 360
step 3. x + 127 = 270. (subtract 90 on both sides)
step 4. x = 143° (subtract 127 on both sides)
What is the distance between two points located at
(5,-5) and (-3,-5)?
Answer:the distance is 8
( this isn’t college math if anything it’s the ending and or beginning of 6th)
Step-by-step explanation:
PLEASE ANSWER ASAP CORRECTLY FOR BRAINLEST!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Answer:
40,009.88
Step-by-step explanation:
The circumference of a circle can be found by multiplying pi ( π = 3.14 ) by the diameter of the circle.
were given the radius, r=6371
diameter = r x 2
6371 x 2 = 12742
12742 = diameter
12,742 x 3.14 = 40,009.88
Answer:
40,030.173592041 km
Step-by-step explanation:
circumference of a circle = 2πr
=2 × π × r
=2 × π × (6371)
=40,030.173592041
HELP ME PLEASE I NEED TO KNOW HOW TO SEE WHICH GRAPH HAS A GREATER B VALUE!!! Can someone also please explain how I can tell which ones has a greater b value
Answer:
hi
Step-by-step explanation:
a has the greater value
Answer:
They have the same B value, B value is the Y-intercept, where the graph starts, both B-values are equal to 1. I'm pretty sure that's correct
B. Subtract the following integers
16.9 - (-5) =
17. - 12 - ( + 8) =
18. 15 - 9=
19. - 5 - (-8)=
20. - 11 - ( + 14 ) =
Answer:
16. 9 - (-5) = 21.9
17. -12 - ( + 8) = -4
18. 15 - 9 = 6
19. -5 - (-8)= 3
20. -11 - ( + 14 ) = -25
Step-by-step explanation:
Subtracting a negative from another number is the same as adding the number. Thus, 16.9 - (-5) = 16.9 + 5.
Hope it helps <3 :)
Answer:
16.9-(-5)=21.9
17.-12-(+8)= -3
18.15-9=9.15
19.-5-(-8)=22
20.-11-(+14)=-5
If the probability of an event happening is 82/97, what are the odds against it happening?
Answer:
15/97?
Step-by-step explanation:
Just Minus the 82 and 97 to be the probability against it happening.
Sorry if I'm wrong
A glass contains 0.75 liters of solution. John uses 0.9 of the solution for his experiment