Answer:
30 of the 15 cent stamps and 50 of the 25 cent stamps
Step-by-step explanation:
Create a system of equations, where x is the number of 15 cent stamps and y is the number of 25 cent stamps:
x + y = 80
0.15x + 0.25y = 17
Solve by substitution by rearranging the first equation:
x + y = 80
x = 80 - y
Substitute 80 - y as x into the second equation:
0.15x + 0.25y = 17
0.15(80 - y) + 0.25y = 17
12 - 0.15y + 0.25y = 17
12 + 0.1y = 17
Solve for y:
0.1y = 5
y = 50
Plug in 50 as y into the first equation, and solve for x:
x + y = 80
x + 50 = 80
x = 30
So, you bought 30 of the 15 cent stamps and 50 of the 25 cent stamps
answer: ten 15¢ stamps and forty 20¢ stamps.
Step-by-step explanation:
because i just took the quiz
Hi if you can answer this i'll mark u brainllest and give you MORE points
Convert 3.16 repeating to a fraction. Explain your strategy or show steps you used to convert the number. (plz don't make really long try to shorten it, because i only have little space to write it)
Answer:
79/25
Step-by-step explanation:convert to a mixed number by placing the numbers to the right of the decimal over 100.
x² +8=5x+2.
Why can’t you determine whether this equation is true or false
— 5х + 9y = -18
Intercepts from an equation
Is the equation 10x+8=10 true false or open
Answer:open
Step-by-step explanation:
Litterally no one is helping me
Answer:
y=1/3x-4
Step-by-step explanation:
The equation for slope-intercept form is y=mx+b.
m=slope
b=y-intercept
When you graph with slope intercept form, you start with whatever number that is the y-intercept. For this equation, you started at -4, so -4 is the y-intercept.
The equation now is y=mx-4. Now, find the slope.
The easiest way to figure out slope is to find the next point on the line and see how far it is from the y-intercept. The point closest (going right) is (3,-3). The slope is rise over run, or y/x. The rise, y, from the next point, is 1. The run, x, is 3. So, the slope is 1/3.
The equation in slope-intercept form is y=1/3x-4.
Hope this helps! Have a great day C:
It costs $12 for admission to the Fair, plus $0.50 for each ticket to play games. If you have a total of $30 to spend, what is the greatest amount of tickets you can buy?
Answer:
36 tickets
Step-by-step explanation:
The expression is given as:
$12 + $0.50× x = $30
12 + 0.50x = 30
0.50x = 30 - 12
0.50x = 18
x = 18/0.50
x = 36 tickets
Therefore, the greatest amount of tickets you can buy is 36 tickets
What is the perimeter of a triangle with sides
11 inches, 4 inches, and 12 inches in length?
11
4
12
А
25 inches
B
16 inches
15 inches
27 inches
Answer:
27 inches
Step-by-step explanation:
i think this is the answer
can someone please help me with my math questionsss
Answer:
yess
Step-by-step explanation:
Answer:
what are they?
It takes 41 pounds of seed to completely plant a 5 acre field. How many acres can be planted per pound of seed?
Answer:
8.2
Step-by-step explanation:
divide 41 by 5 to get your answer
what is -15/16 + (-7/16)=
Answer:
-11/8 or -1.375:)
Step-by-step explanation:
Answer:
-15/16 + (-7/16) = -22/16
Now, we can simplify the fraction by dividing both the numerator and denominator by their greatest common factor (GCF), which is 2:
-22/16 = -11/8
Therefore, -15/16 + (-7/16) = -11/8.
Solve for x :
(2x – 10) (x – 6) = 0
Answer:
x=5,6
Step-by-step explanation:
Answer:
x=5
Step-by-step explanation:
Which of the binomials below is a factor of this trinomial?
3x2 + 18x-21
O A. X-3
O
B. X-1
O c. x+1
O D. X+ 3
SUBMIT
Answer:
B. X-1
Step-by-step explanation:
[tex]3x^2 + 18x-21[/tex]
Factor out common term : 3
[tex]=3\left(x^2+6x-7\right)\\\\Factor\: : x^2+6x-7\right \\\\=3\left(x-1\right)\left(x+7\right)[/tex]
Find the slope of the line that passes through (10,8) and (1,9).
Answer: 1/-9 or -0.111(repeating)
Step-by-step explanation:
The slope of the line that passes through (10,8) and (1,9) is -1/9
The formula for calculating the slope of a line is expressed according to the formula:
[tex]m=\frac{y_2-y_1}{x_2-x_1}\\[/tex]
Given the coordinate points (10,8) and (1,9), the slope is expressed as:
[tex]m=\frac{9-8}{1-10}\\m=\frac{1}{-9}\\m=-\frac{1}{9}[/tex]
Hence the slope of the line that passes through (10,8) and (1,9) is -1/9
Learn more on slope here; https://brainly.com/question/17252894
Brandy drove four times as far as Tomas. Together, they drove 75 miles. Which equation below can be used to find the number of miles Tomas drove?
Answer:
x+4x=75
Step-by-step explanation:
Equation: x+4x=75
5x=75
x=15
A bag has 7 red marbles, 8 blue marbles and 5 purple marbles. Rachel draws a marble from the bag without looking.
What is the probability that Rachel draws a blue marble?
O A 45
OB. 8%
O c. 12.5%
D. 405
O E 66.75
Answer:
40%
Step-by-step explanation:
7+8+5=20
8/20
.40 then move the decimal to the left 2 times and there's your answer
solve for x: x+15=45
Answer:
x = 30
EXPLANATION:
Move all terms not containing x to the right side of the equation.
Subtract
15 from 45 then you get your final answer x = 30
Marry has 1 apple and she give Greg 1 how many does she have ?
Answer:
0 apples
Step-by-step explanation:
5,18, 31, 44, 57, 70
Which expression represent the nth number in this sequence?
Answer:
a(n) = 5 + 13(n - 1)
Step-by-step explanation:
Note that each new number is obtained by adding 13 to the previous number. The common difference is 13 and the first number is 5. The general formula for an arithmetic sequence is
a(n) = a(1) + d(n - 1), where d is the common difference.
Here,
a(n) = 5 + 13(n - 1)
Marci needs to rent a storage unit. She needs to determine the volume of the storage unit to decide if the storage unit is big enough to hold her things. If the storage unit is 8 ft high, what is the volume of the storage unit? A. 176 ft3 B. 192 ft3 C. 144 ft3 D. 136 ft3
Answer:
(B) 192 cubic feet.
Step-by-step explanation:
To determine the volume, V, first determine the area of the base, A, then, multiply the area with the height, h, to get the volume, as
V=Ah ...)i)
From the figure, the area of the base ABCDEFG
= Area of the rectangle ABCG + Area of the rectangle CDEF
Now, from the figure,
Area of the rectangle ABCG =2 x 2 = 4 square feet.
The length side CF= CG+FG, as CG=AG
So, CF= CG+AG =2+4= 6 feet.
And the length of the side CD= BD-BC, as BC=AG,
So, CD= BD-AG =5-2= 3 feet.
Area of the rectangle CDEF = 6 x 3 = 18 square feet.
So, the area of the base ABCDEFG, A = 18+4 = 22 square feet.
The given height, h= 8 feet.
So, from equation (i), the volume, V is
V= 22 x 8 = 192 cubic feet.
Hence, option (B) is correct.
Answer:
176m
Step-by-step explanation:
i know
which word with the root micro can be defined as small sound
Answer:
Micrometer, Is the answer
Step-by-step explanation:
2=3=5
if my answer gets deleted.. never mind very unprofessional of me of what i was gonna say..
ENJOY:)
13. 30 to 90
A. 3%; increase
B. 67% increase
C. 200%: increase
D. 300%; increase
Answer:
67% increase
Answer:
C
Step-by-step explanation:
The formula for percent increase is [ new-old/old * 100% ]
90-30/30 * 100%
60/30 * 100%
2 * 100%
200%
Best of Luck!
In ΔQRS, q = 25 inches, r = 58 inches and s=37 inches. Find the measure of ∠R to the nearest degree.
Answer:138
Step-by-step explanation:
Answer:
138
Step-by-step explanation:
delta math
CASH APP for the first person to get it right
Element X is a radioactive isotope such that every 30 years, its mass decreases by half. Given that the initial mass of a sample of Element X is 1400 grams, how long would it be until the mass of the sample reached 800 grams, to the nearest tenth of a year?
Answer:
93.3
Step-by-step explanation:
You would divide the years by .5
and divide that answer by 30
Answer:
24.2
Step-by-step explanation:
$neonjumper
Angie works 5 days a week she gets payed $15 per hour she works for 8 hours everyday how much money did she get by the end of the week
Answer:
$600
Step-by-step explanation:
15 x 8 x 5
Liam reads 35 pages in 4 hours. How many pages can he read
in 6 hours?
Answer: 52.5
Step-by-step explanation:
Divide 35 by 4
Multiply the number you get by 6
Answer:
Liam reads 52.5 pages in 6 hours
Step-by-step explanation:
to solve this problem you need to start with finding how many pages he reads in 1 hour.
to do this, divide 35 by 4.
35/4 = 8.75
the unit rate is 8.75 pages per hour.
now just multiply the unit rate by the amount of hours.
8.75 * 6 = 52.5
what is 30 percent of $40
Answer:
12$
Step-by-step explanation:
When taking a percentage of something
You are multiplying because that is what of implies.
To convert a percentage to a decimal get rid of the %, and divide by 100.
Given 30 percent of $40, Multiply the converted decimal of the percentage, and the quantity.
30% of $40 = 30/100 × 40$ = 3/10 × 40$ = (40$ × 3) / 10 = (40$ + 40$ + 40$) / 10 = 120$ / 10 = 12$
The 14 students in the Spanish club need to raise $562.84 for their summer trip to Spain. They have already raised $238.32. If each student raises the same amount, how much more money must each student raise?
Answer:
$23.18
Step-by-step explanation:
You have to subtract $562.84 and $238.32 and you get $324.52 then you have to divide $324.52 and 14 to get $23.18
Hope this helps please mark me brainliest☺️
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Okay if there is 40 question on test how many do I get wrong to still have a A
Answer:
4 answers
Step-by-step explanation:
100/40 x 36= 90
Jack bought a scarf that costs 15 dollars and a hat that costs 22 dollars. At the counter, he received a discount. If he only paid 34 dollars total, how many dollars was the discount?
Which of these kinds of evidence would be the best to support the claim that basketball is the best sport for physical fitness?
A. quotations from basketball players
B. the final score of the basketball championship
C. statistics about the health of basketball players
D. the story of a girl who got in shape by joining the basketball team