Answers
Answer:
6,561
39,204
25,575
52.5625 - 7.5625 = 45
Step-by-step explanation:
(i)
(81)^2
Use (a + b)^2 = a^2 + 2ab + b^2
(81)^2 = (80 + 1)^2 =
= 80^2 + 2 * 80 * 1 + 1^2
= 6400 + 160 + 1
= 6561
(ii)
(198)^2
Use (a - b)^2 = a^2 - 2ab + b^2
(198)^2 = (200 - 2)^2 =
= 200^2 - 2 * 200 * 2 + 2^2
= 40,000 - 800 + 4
= 39,204
(iii)
165 * 155
Use (a + b)(a - b) = a^2 - b^2
165 * 155 = (160 + 5)(160 - 5) =
= 160^2 - 5^2
= 25,600 - 25
= 25,575
(iv)
(7.25)^2 - (2.75)^2
Use a^2 - b^2 = (a + b)(a - b)
(7.25)^2 - (2.75)^2 =
= (7.25 + 2.75)(7.25 - 2.75)
= 10(4.5)
= 45
Related Questions
In 2010, Isaiah paid $6,910 in federal income tax. In 2011, he paid $8,292. What is the percent of increase in the amount paid?
Answers
Find 38% of 92. Round to the nearest whole number.
Answers
Answer:
38% of 92 rounded to the nearest whole number is 35.
Step-by-step explanation:
First we need to convert 38% into a decimal, 0.38.
Now we multiply 0.38 and 92.
So:
0.38 × 92 = 34.96
34.96 rounded to the nearest whole number is 35.
A local hamburger shop sold a combined total of 488 hamburgers and cheeseburgers on Friday. There were 62 fewer cheeseburgers sold than hamburgers. How
many hamburgers were sold on Friday?
Answers
9514 1404 393
Answer:
275
Step-by-step explanation:
Let h represent the number of hamburgers sold. Then the number of cheeseburgers sold is h-62, and the combined total is ...
hamburgers + cheeseburgers = combined total
h + (h -62) = 488
2h = 550 . . . . . . . . add 62, collect terms
h = 275 . . . . . . . . . .divide by 2
275 hamburgers were sold on Friday.
There were 24 boys and 20 girls in a chess club last year. This year
the number of boys increased by 25% but the number of girls
decreased by 10%.
Find the overall percent change in membership of the club.
10
Answers
Answer:
35%
Step-by-step explanation:
If you take the amount of percent the girls decreased, and the amount the boys increased in percentages, you will have your answer when just adding them together. So the answer is 35% or as in 6 boys joined and 2 girls left. So that gives you a total of 8 joining or leaving the chess club or 35% difference.
Please help! asap ill brainlist you :(
At midnight there were 5 inches of snow on the ground. Since then, snow has been falling at the rate of ½ inch per hour. Identify the y-intercept.
Answers
Answer:
5
Step-by-step explanation:
hope this helps!!!
please help me with this question
Answers
Answer:
it is not linear
Step-by-step explanation:
Rewrite y - 3 = 4(x + 2) in slope intercept form. Type in your answer without using any spaces. Example: y=-3/4x+12
Answers
Answer:
y=4x+11
Step-by-step explanation:
Answer:
y=4x+11
Step-by-step explanation:
y - 3 = 4(x + 2)
=
y - 3 =4x + 8
=
y - 3 (+3) = 4x + 8 (+3)
=
y=4x+11
100 points!!
Nicole has 425 candy bars to sell for a fundraiser. Let C be the number of candy bars. Let P be the amount made from selling the candy bars. Suppose that P = 2C - 300 gives P as a function of C.
Identify the correct description and appropriate set of values for the domain of the function.
Group of answer choices
the number of candy bars; open curly brackets 0 comma 1 comma 2 comma 3 comma horizontal ellipsis comma 425 close curly brackets
the number of candy bars; the set of all real numbers from 0 to 300
the amount made from selling the candy bars; the set of all real numbers from 0 to 300
the amount made from selling the candy bars; open curly brackets 0 comma 1 comma 2 comma 3 comma horizontal ellipsis comma 425 close curly brackets
Answers
Answer:
its c
Step-by-step explanation:
i just too quiz and it siad this
Answer:
c
Step-by-step explanation:
took the quiz and got 100% on it
what is the anwser to 20<2m-16
Answers
Answer:
the answer is m>18 hope this helps
A skating rink changes one admission price for adults and a different admission price for children. The total admission price for a group of 4 adults and 10 children is $57. The total admission price for a group of 3 adults and 7 children is $41. What are the admission prices for an adult and for a adult?
Answers
Given:
The total admission price for a group of 4 adults and 10 children is $57.
The total admission price for a group of 3 adults and 7 children is $41.
To find:
The admission prices for an adult and for a children.
Solution:
Let the price of an adult be x and price of children be y.
According to the question,
[tex]4x+10y=57[/tex] ...(i)
[tex]3x+7y=41[/tex] ...(ii)
Multiply equation (i) by 3.
[tex]12x+30y=171[/tex] ...(iii)
Multiply equation (i) by 4.
[tex]12x+28y=164[/tex] ...(iv)
Subtract (iv) from (iii).
[tex]12x+30y-12x-28y=171-164[/tex]
[tex]2y=7[/tex]
Divide both sides by 2.
[tex]y=3.5[/tex]
Put y=3.5 in (i).
[tex]4x+10(3.5)=57[/tex]
[tex]4x+35=57[/tex]
[tex]4x=57-35[/tex]
[tex]4x=22[/tex]
Divide both sides by 4.
[tex]x=5.5[/tex]
Therefore, the price for an adult is $5.5 and price for a child is $3.5.
(8x+9)(7x^2+3x+3)
Multiply
Answers
Answer:
56x³+87x²+51x+27
Step-by-step explanation:
You have to do box method. Draw a box that 3 by 2 cubes long. On the side that is 3 cubes long. Write 7x² on top of the first cube, 3x on top of the second cube, and 3 on top of the third cube. On the side that is two cubes long, write 8x next to the first cube and 9 next to the second cube.
If y varies directly as x, and y = 8 when x = 3, what is the value of y when x = 9?
Answers
Answer:
answer is 25
Step-by-step explanation:
becuz i said so
Please Help!!
Triangle ABC has vertices A (3,4), B (-5,2), and C (1,4).
Determine
a) an equation for CD, the median from C to AB
i. Find the coordinates of D (th mid point).
Answers
please help and answer this question
Answers
Answer:
-2x+9
This is the answer you are looking for
YOUR WELCOME! :D
Situation #3: Jamie can type 243 words in 3 minutes. How many words can
she type in 10 minutes?
Answers
Answer:
810 words
Step-by-step explanation:
243 words per 3 minutes
243/3 to get 81 words per minute
81 times 10 = 810
I don't understand.
Answers
Answer:
Addition property of equality.
Step-by-step explanation:
You are adding something to both sides of the equation.
Answer:
Addition property of equality
Step-by-step explanation:
Sam is flying a kite. The length of the kite string is 80 meters, and it makes an angle of 75° with the ground
Answers
what does the question ask?
Answer: 77.27
Step-by-step explanation: I did the test and I got it right.
Joy invests $13,000 into an account at an annual rate of 0.6% simple interest for 24 months. what is the principal?
Answers
Answer:
I would think the principal is $13,000
Step-by-step explanation:
Answer:
Principle =$13000
Step-by-step explanation:
25 Points Please help
Answers
Answer:
It's Not possible that both answers are correct because one person is adding and the other person is using subtraction meaning one person would have a higher number for there answer and the other person would have a lesser number for their answer. In some cases it's not possible but in other cases it is possible
Step-by-step explanation:
Can i have branliest?
Answer:yes, its possible.
Step-by-step explanation:
Emilio added 6 with -3
While Jim subtracted 3 from 6
Both lead to the same answer 6+(-3)=3,6-3=3
please help i dont know how to do this
Answers
Answer:
B.
Step-by-step explanation:
jason is filling up a 3/4 gallon pitcher. the one he has to fill it up with is 1/3 of a gallon.
1/3 * x = 3/4
x/3 = 3/4
3 (x/3) = 3 (3/4)
3x/3 = 9/4
x = 9/4
9/4 is 2.25 so the answer is B
f(x)=4x+4;{-2,-1,0,1,2}
Answers
Answer:
i need more info
Step-by-step explanation:
please comment on this to tell me all of said details
Answer:
55 and the gravitational of a new one
Step-by-step explanation:
7th grade and the gravitational of a
A driver travels 208 miles in 4 hours. what is the driver's speen,in miles per hour ?
___miles per hour
Answers
Answer:
52
Step-by-step explanation:
miles per hour so 208, which is miles and 4 which is hours so 208/4 which is 52
Answer:
Hi there,
52 miles/hr
Step-by-step explanation:
we just divide 208 by 4
(-4,6), (r,10) and m = -2. what is r?
Answers
Answer:
-6
Step-by-step explanation:
The formula of slope Y2-Y1/X2-X1
so you actually use this formula equal to -2
10-6/X-(-4) = -2
If 9y - 5 = 22, find the value of 2y.
Answers
Answer:
3=y
Step-by-step explanation:
9 × 3 = 27 27 - 5 = 22 2y = 5
Pls help me and I’ll give brainliest
Answers
Answer:
-2
Step-by-step explanation:
do you need an walk through?
the perimeter of a rectangle is 8x+10.if the length is 2x+8 what is the width?
Answers
Answer:
6x+2
Step-by-step explanation:
Answer:combine your like terms and solve to get the width .
Step-by-step explanation:
HELP ASAP!! WILL MARK BRAINLIEST!!!
Varsha wants to stay in Bolandia City for four nights and has a choice of four hotels. She will stay at the same hotel for all four nights. She requires internet access throughout her stay and breakfast each morning.
Which hotel is the cheapest.
Need steps.
Answers
Answer:
First of all i just did this in school! <3 And second of all I WILL HELPP!!
Step-by-step explanation:
its luxuryyyyy!!!!!!!!!
11. Solve the problem.
Al earns $8.75 per hour and wants to buy a Kindle for $149. About how many hours must he work?
about 10 hours
Answers
Answer:
18
Step-by-step explanation:
149/8.75 = 17.02
If he gets paid by the hour, it has to be rounded upwards.
33+44 please help me
Answers
Answer:
77
Step-by-step explanation:
What is the stored energy of an object called?
Kinetic energy
Mechanical energy
Potential energy
Translational energy
Answers
Answer:
potential energy
Step-by-step explanation:
because when an object has stored energy its call potential but if it was kenetic energy the energy would have to move
Answer:
C
Step-by-step explanation: