25. (REI.5) What is the value of y in the
following system of equations?
3y = 2x-6
x + y = 8
A. 2
B. 6
C. -2
D. -6
Answer:
6
Step-by-step explanation:
x +y = 8
-x. -x
y = 8 - ×
substitute into the 1st equation
3(8 - x) = 2x - 6
24 - 3x = 2x - 6
+6. +6
30 - 3x = 2x
+3x. +3x
30 = 5x
÷ by 5
x = 6
metalworker has a metal alloy that is 25% copper and another alloy that is 70%
copper. How many kilograms of each alloy should the metalworker combine to create 50kg of a 52% copper alloy
x = amount (kg) of 25% coper alloy
y = amount (also kg) of 70% copper alloy
Each kilogram of the 25% alloy contains 0.25 kg of copper, while each kilogram of the 70% alloy contains 0.7 kg of copper. When combined, the metalworker ends up with (x + y) kg of an alloy that should consist of 52% copper, so that it contains 0.52 (x + y) kg of copper.
The metalworker wants to make 50 kg of this new alloy, so that
x + y = 50
of which 52%, 0.52 (50 kg) = 26 kg, is copper, so
0.25x + 0.7y = 26
Solve for y in terms of x :
y = 50 - x
Substitute this into the other equation and solve for x :
0.25x + 0.7 (50 - x) = 26
0.25x + 35 - 0.7x = 26
9 = 0.45x
x = 20 → y = 30
PLEASE ANSWER ITS DUE IN 5 MINUTES!! What is the are of the figure?
Answer
Cut out the shapes, and then multiply them.
Step-by-step explanation:
The owner of an automotive shop devotes 90% of his workweek to supervising, sales and accounting tasks. In one week, the owner spent 36 hours of his workweek on supervising, sales and accounting tasks. How many hours did he work that week? Group of answer choices
Answer: He worked 40 hours that week.
Step-by-step explanation:
Given : The owner of an automotive shop devotes 90% of his workweek to supervising, sales and accounting tasks. In one week.
Let x = Number of hours he work in a week.
then, Hours for supervising, sales and accounting tasks = 90% of x
As per given ,
[tex]90\%\ of \ x= 36\\\\\Rightarrow\ 0.90x=36\\\\\Rightarrow\ x=\dfrac{36}{0.9}=\dfrac{360}{9}\\\\\Rightarrow\ x=40[/tex]
Hence, he worked 40 hours that week.
The formula for the volume of a sphere is given below and the relationship between the radius r and the diameter d is r=d/2. Find the EXACT volume of the sphere in terms of the diameter d. Be sure to fully simplify the expression
Answer:
for the volume of the sphere its answer is 4πr³/3 which when converted to diameter will be 2(4πr³/3) as r=diameter/2 so diameter =2r
Answer:
4πr³/3
Step-by-step explanation:
When converted to diameter will be 2(4πr³/3) as r=diameter/2 so diameter =2r
1/3 as a percent I REALLLLYY NEED GOUR HELPP
Answer:
33% or 33.3% or 33.33%
Step-by-step explanation:
1/3 as a decimal is 1 divided by 3 which ends up being an infinite number: 0.33333333333333333333333...
But you can write it as 33% or 33.3% or 33.33%
y = [tex] \frac{ - 5}{2} [/tex]x-5
-6
-4
-2
0
2
fine the slope of the table below
PLEASE HURRY I'LL GIVE THE MOST BRAINLY!!!!!!!!!!!!!! Apples are on sale for $1.49 per pound. What is the price for 2 1/2 pounds of apples? Express your answer in decimal form, and round your answer to the nearest hundredth.
Answer:
$3.725
Step-by-step explanation:
1.49/ per pound
1.49× 2.5= 3.725
i need help im going to post later a 3 more times 10 points
Answer:
X=9 Y= 3
Step-by-step explanation:
Answer:
hi
Step-by-step explanation:
I need the answer ASAP
Answer: Its a rational number
Step-by-step explanation: All repeating decimals are rational :)
Cameron is going to an amusement park. The price of admission into the park is $20, and once he is inside the park, he will have to pay $4 for every ride he rides on. How much money would Cameron have to pay in total if he goes on 7 rides? How much would he have to pay if he goes on r rides?
Answer:
If he goes on 7 rides he will play $48
The equation if he goes on r rides is $20+$4r
Step-by-step explanation:
Answer:
48
20(4r)
Step-by-step explanation:
20+(4×7)=48
Hope this helps!
Please mark me brainliest if possible. :)
12) Two rectangles are similar. The length of small rectangle is 4 and the length of the big
rectangle is 12. If the perimeter of the smaller rectangle is 28, then what is the perimeter
of the larger rectangle
Answer:
84
Step-by-step explanation:
To get from 4 to 12, you multiply with 3.
Everything is 3 times as big in the larger rectangle.
This includes the perimeter.
Example:
small rect 4x10, perimeter 4+4+10+10 = 28
large rect 12x30, perimeter 12+12+30+30 = 84
but also 28x3 = 84
The perimeter of the larger rectangle is 84.
What is perimeter?Its the sum of length of the sides used to made the given figure.
We are given that length of small rectangle is 4 and the length of the big
rectangle is 12. If the perimeter of the smaller rectangle is 28,
The small rectangle
length = 4
perimeter = 28
The big rectangle
length = 12
perimeter = ?
The small rectangle perimeter = 2l + 2w
28 = 2 * 4 + 2 w
28 - 8 = 2w
20 / 2 = w
10 = w
The big rectangle perimeter;
4 w = 10 * 12
w = 120 / 4 = 30
Perimeter = 2*12 + 2*30
= 24 + 60 = 84
The perimeter of the big rectangle is 84.
Learn more about perimeter here:
https://brainly.com/question/10466285
#SPJ2
Need help fast!!
Read the problem in the box below. See if you can figure out the most logical
answer.
If Jay ran 1 mile in 6 minutes on Monday, 2 miles in 12 minutes on Tuesday,
and 3 miles in 18 minutes on Wednesday, how many miles do you think he
might run in 24 minutes on Thursday?
A. 4 miles
B. 3 miles
C. 5 miles
D. 2 miles
SUBMIT
Answer:
4 miles
Step-by-step explanation:
four times six equals 24
its the number of miles times six equals the minutes
Duncan and his family are season ticket holders for their favorite baseball team. Last year, the cost of season tickets was $2,730. This year, the cost is $3,333.80. What was the percent of increase in the cost of season tickets?
Round your answer to the nearest tenth of a percent.
Answer:
10%
Step-by-step explanation:
To find the answer we need to know what percentage of $1030 is $927 and to do this we can multiply 927 by 100 and divide by 1030.
(927(100))/1030
92700/1030
90
so now that we know $927 is 90% of $1030 we can subtract 90 from 100 and it'll give us the percentage decrease. Which is 10%.
Hope this helps!!!!!!!!!!!!
///////////////////////////////////////////////////////////////////////////////////////////////////
A swimming pool and deck are built in a rectangle with length 40 ft and width 18 ft. If the pool itself is
320 square feet, what is the area of the deck itself?
A. 320 square feet
B. 400 square feet
C. 480 square feet
D. 560 square feet
Every rational number is an integer.
True
False
======================================================
Explanation:
A counter-example could be something like 2/3 which is rational, but not an integer since 2/3 = 0.67 has a fractional or decimal portion to it. An integer is one where its a positive or negative whole number. Zero is also an integer.
Any rational number is a ratio or fraction of two integers. Zero is not allowed in the denominator. Any integer is a rational number since x = x/1, where x is any integer. For example, 9 = 9/1.
Answer:
False
Step-by-step explanation:
Rational numbers include all integers, fractions, or terminating and repeating decimals.
Add the following lengths:
2' 8"
+ 1' 6"
Answer:
4 ft, 2 in
Step-by-step explanation:
2 ft, 8 in plus 1 ft, 6 in = 3 ft, 14 in
there are 12 inches in a foot
3 ft, 14 in equals 4 ft, 2 in
Answer:
4' 2" inches (rounded)
Step-by-step explanation:
2' 8" + 1' 6" = 4.16666667 feet (exact number)
4.16666667 ≅ 4' 2"
Harriet used her credit card to buy a $779 laptop, which she paid off by making identical monthly payments for two and a half years. Over the six years that she kept the laptop, it cost her an average of $0.36 of electricity per day. Harriet’s credit card has an APR of 11.27%, compounded monthly, and she made no other purchases with her credit card until she had paid off the laptop. What percentage of the lifetime cost of the laptop was interest? (Assume that there were two leap years over the period that Harriet kept the laptop, and round all dollar values to the nearest cent.)
a.
7.03%
b.
13.21%
c.
11.27%
d.
6.97%
Answer:
7.03%
Step-by-step explanation:
The percentage of the life time cost which was the interest is; Choice B; 13.21%
Percentage and InterestSince, the APR is compounded monthly at an Annual percentage rate, APR of 11.27%, it follows that;
A = 779(1+0.1127)^(2.5)Hence, the total amount to be paid over the two and half years is; A = $1017.38.
Hence, the interest is given as;
Interest = $1017.38 - $779 = $238.38.The cost of electricity bill at $0.36 per day, (Assuming that there were two leap years over the period).
Cost = 0.36((4×365) +(2×366))Cost = $789.12Hence, the lifetime cost of the laptop is; $789.12 + $1017.38 = $1806.5.
Ultimately, the required percentage is;
($238.38/$1806.5) × 100% = 13.21%Read more on percentages and interest;
https://brainly.com/question/25793394
Ashley is buying a bagel for her friends for lunch. The person in front of her buys a half a dozen bagels (6) for $38.35. How much would she pay for her and 8 friends bagels?
$57.52
divide the price for 6 people by 6, then multiply it by 9.
Answer:
57.53 dollars for 9 bagels.
Step-by-step explanation:
6 bagels cost 38.35
9 bagels cost x
6x = 9 * 38.35
6x = 345.15
x = 345.15/6
x = 57.53
Are 9 bagels really that expensive? I think I'll stick to Wendy's Hamburgers.
PLEASE ANSWER THIS ONE QUESTION, I PROMISE IT WON'T TAKE LONG, I HAVE TO SUBMIT IT BEFORE 7:00 PM, PLEASE HELPPP
Answer:
the 5's
Step-by-step explanation:
it has to be the fives right? if not look it up and go to my page and take 10 of my points from one of my questions. Welcome.
Help plz:)))I’ll mark u Brainliest
Answer:
The answer to the question provided is letter c.
The Hurry-Mart convenient store is re-stocking their shelves. They always stock the m&m to Hershey bars at a ratio of 10 to 8. How many Hershey bars do they need if they have 15 bags of m&ms ?
Answer:
12 Hershey bars
Step-by-step explanation:
if its 10 to 8 and you have 15 m&m then you would have to do the 10 which you would have to put 8 then 5 is half of 10 so you would just half 8 which is 4 so 8+4+12. 12 Hershey bars needed to restock the shelf.
Solve the equation using the multiplicative property of equality and the reciprocal. -2(a-5)=-1/2)10. (-1/2)(-2)(q-5)=(-1/2)10. q-5=-5.
q=
Answer:0
Step-by-step explanation:
took the test
Answer: 0
Step-by-step explanation:
yw
Solve using the Quadratic Formula:
3x2−12x−9=0
Answer:
x²+x-1=0
3x²-12x-9=0
Undefined
If there are 624 calories in 3 servings, how many calories are in 1 serving
Answer:
208 calories
Step-by-step explanation:
You have to divide 624 by 3, and you get 208.
jason built a rectangular tool shed that is 8 meters wide and has an area of 96 square meters. what is the length of jasons tool shed?
Answer:
12 meters
Step-by-step explanation:
Area = length × width. If we divided 96 (area) by 8 (width) we should get the length. 98 ÷ 8 = 12.
17. Find the missing angle(s).
soto
\b
Omg pls hurry I need help
Answer:
B = 50 & C = 130
Step-by-step explanation:
I really don't know how to explain but 180 - 50 = 130 for C and 50 is the measurement for B
Change the word statement to an equation.
Use x as the variable.
The sum of two-thirds a number and 19 is 93.
Answer:
x 2 +19=93
3
hope it helps..
Are these triangles similar?
pretty sure its no, the number on the outside arent the same meaning both areas wont add up.