Solve using the Quadratic Formula:
3x2−12x−9=0
Answer:
x²+x-1=0
3x²-12x-9=0
Undefined
what are two ratios that are equivalent to 1:1
Answer:
2:14 and 3:21
Step-by-step explanation:
Kathy is planning a party. She decides to serve pizza to her guests and estimated that she will need 12 pizzas with 8 slices each. If each person eats 3 pieces, then how many people cans she serve.
Answer:
32 people can she serve
Step-by-step explanation:
12x8=96
96 divided by 3=32
Solve the equation. b/6 = 3 b=
Answer:
b = 18
Step-by-step explanation:
We do the inverse operation thing:
3 x 6 = 18
We can check it by filling it in:
18/6 = 3
So b = 18
Urgent help need it plz help
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.
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Can you please help me
Write an expression for: the product of 4 and a number. Use x as the variable. Who ever gets it correct first gets brainliest.
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:
Help plz will do BRAINLIEST!!!!!!
Answer:
125 56 − x 7
Step-by-step explanation:
1/2-3/8/1/3+4/7(5- 1/4 x)
In a large population, 57 % of the people have been vaccinated. If 5 people are randomly selected, what is the probability that AT LEAST ONE of them has been vaccinated?
Answer:
0.986
Step-by-step explanation:
Probability of at least one being vac = 1 - Probability of all 5 not vac
1 - (1-0.57)^5 = 1 - (0.43^5) = 1 - 0.014 = 0.986
The probability that at least one of the five randomly chosen individuals had received a vaccination is around 0.956, or 95.6%.
Given that in a population, 57% people were vaccinated.
5 people are randomly selected, we need to find the probability that at least one of them has been vaccinated.
To calculate the probability that at least one of the five randomly selected people has been vaccinated, we can use the complementary probability approach.
The probability that none of the five people have been vaccinated is equal to the complement of the probability that at least one of them has been vaccinated.
So, let's calculate the probability of none of them being vaccinated and subtract it from 1 to find the desired probability.
The probability that a randomly selected person has not been vaccinated is 1 - 0.57 = 0.43 or 43%.
Since the selection of each person is independent, the probability that all five of them have not been vaccinated is:
P(Not Vaccinated) = 0.43⁵ = 0.043855
The probability that at least one of them has been vaccinated is the complement of the above probability:
P(at least one vaccinated) = 1 - P(not vaccinated)
= 1 - 0.043855 = 0.956145
Therefore, the probability that at least one of the five randomly selected people has been vaccinated is approximately 0.956 or 95.6%.
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For a field trip 4 students rode in cars and
the rest filled nine buses. How many
students were in each bus if 472 students
were on the trip?
1a. What does the variable "x" represent?
1b. What equation represents this word problem?
1c. What is the solution to the word problem?
(Please help me with this quiz)
Step-by-step explanation:
We are solving for the number of students in each bus, so let x represent the number of students in each bus.
We have 4 + 9x = 472.
=> 9x = 468, x = 52.
Hence there are 52 students on each bus.
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.
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%
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;
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what is -2(3x + 12y - 5 - 17x - 16y + 4)
Answer:
−2(3x+12y−5−17x−16y+4)
=(−2)(3x+12y+−5+−17x+−16y+4)
=(−2)(3x)+(−2)(12y)+(−2)(−5)+(−2)(−17x)+(−2)(−16y)+(−2)(4)
=−6x−24y+10+34x+32y−8
=28x+8y+2
(～￣▽￣)～ -Have a wonderful day-Rosa is making bracelets to sell at the craft fair.
Yesterday she made 36 in 8 hours. Find k the
(constant of proportionality) and write the rule
(equation) for this relationship.
9514 1404 393
Answer:
k = 4.5
y = 4.5x . . . y bracelets in x hours
Step-by-step explanation:
The constant of proportionality is the "unit rate", the number of bracelets per hour.
k = bracelets/hours = 36/8 = 4.5
The constant of proportionality is 4.5 (bracelets per hour).
__
The equation of a proportional relationship is ...
y = kx
For this relationship, ...
y = 4.5x . . . . . . y bracelets in x hours
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
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.
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. :)
In which step did the veterinarian make the first error?
Step 1
Step 2
Step 3
Step 4
Answer:step 3 Step-by-step explanation: because it is right and i took the test edge 2021
I will give brainiest to whoever answers correctly !!
Answer:
2.4
Step-by-step explanation:
The formula you would use is: A = P(1 + rt)
P is the principal which is $270
r is the interest rate
t is the time in years but we have 11 days so 11/360
A is $19.8
let's put the values in the formula
$289.9= $270(1 + r*(11/360))
you will find the r is 2.4
I need the answer ASAP
Answer: Its a rational number
Step-by-step explanation: All repeating decimals are rational :)
???????????????????????????
Answer:
-9
Step-by-step explanation:
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.
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"
A recycling bin in the shape of a rectangular prism has a volume of 9,720 cubic
inches. The base area of the recycling bin is 324 square inches. What is the height
of the recycling bin?
A. O 10 inches
B. O 15 inches
C. O 30 inches
D. O 36 inches
Answer:
YOUR MOM IS THAT BIG
Step-by-step explanation:
LOL
Help plz:)))I’ll mark u Brainliest
Answer:
The answer to the question provided is letter c.
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
Consider the exponential function g(x) = 1,296x .
Find the output values for x-values x = –1.75, –1, –0.25, 0, 0.25, 0.50, 0.75, and 1.
Answer:
g(-1)=1/1296
g(.25)=1/6
g(0)=1
g(.25)=6
g(.50)=36
g(.75)=216
g(1)=1,296
:)