Answer:
159.99-39.99=120
120/159.99*100=12000/159.99
12000/159.99≈75.00
approximately 75%
Ms. Swanson asked the question, "How does knowing the fact 6 × 5 6×5 help you find 60 × 500 60×500?" Maria answered, "I know 6 × 5 6×5 is 30 30. Now all I have to do is count the zeros and I get 3 , 000 3,000." Use place value understanding to explain why her answer is incorrect.
Answer:
Correct answer is 30,000
Step-by-step explanation:
From multiplication :
6 * 5 = 30
Now moving to:
60 * 500
Number of ending zeros in both values = 3 ; (000)
This 3 0's will be placed at the end of the result of multiplying 6 by 5
Hence,
6 * 5 = 30
60 * 500 = 30+000 = 30,000
Hence, 60 * 500 = 30000
The function below can be used to calculate the cost of making a long distance call, f(m), which is based on a $2.50 initial charge and a fee of $.12 per minute, m, that the call lasts.
f(m)=2.5+0.12m
If Natalie paid $6.82 for one call, how many minutes long was it?
Answer:
she was on a call for 36 minutes
Step-by-step explanation: 6.82-2.5= 4.32 4.32/.12= 36
Which of the following lists of ordered pairs is a function?
A. (1,1),(2,3)(1,5),(4,7)
B. (2,4),(-2,4), (3,9), (-2,-4)
C. (2,4), (3,9),(4,16), (5,25)
D. (0,2), (4,2), (0, -4), (4.-2)
Alice made lemonade for her school's fall festival as a fundraiser. She made a total of 5 gallons, which is 80 cups. They sold, on average 16 cups per hour. Write an equation that represents y, the number of cups of lemonade remaining, after x hours
Answer:
y = 80-16x
Step-by-step explanation:
She made a total of 80 cups and sells 16 cups per hour
So in x hours she would have sold 16 * x = 16x cups
So the number of cups remaining will be;
y = 80-16x
is this a function? (it says the question has to b at least 20 characters long, sorry)
help please!:(
right answers only please
Answer:
100 dollars a month I think
Answer:
-100 dollars per month
Step-by-step explanation:
since it decreases, it needs to be negative
Rebecca has put a rectangular
vegetable garden in her backyard. The garden is 16 ft and 11 ft
What is the area of Rebecca’s garden
in square feet?
Answer:
176 ft squared
Step-by-step explanation:
Answer:
the answer is 175 like his or her
{x^2+6x-27/x^2-9x+18
how to solve step by step
Answer:
Step-by-step explanation:
Step by Step Solution:
More Icon
STEP
1
:
5
Simplify ———————
x2 - 81
Trying to factor as a Difference of Squares:
1.1 Factoring: x2 - 81
Theory : A difference of two perfect squares, A2 - B2 can be factored into (A+B) • (A-B)
Proof : (A+B) • (A-B) =
A2 - AB + BA - B2 =
A2 - AB + AB - B2 =
A2 - B2
Note : AB = BA is the commutative property of multiplication.
Note : - AB + AB equals zero and is therefore eliminated from the expression.
Check : 81 is the square of 9
Check : x2 is the square of x1
Factorization is : (x + 9) • (x - 9)
Equation at the end of step
1
:
(((x2)-18x)+81) 5
———————————————•———————————
(((x2)-6x)-27) (x+9)•(x-9)
STEP
2
:
x2 - 18x + 81
Simplify —————————————
x2 - 6x - 27
Trying to factor by splitting the middle term
2.1 Factoring x2 - 18x + 81
The first term is, x2 its coefficient is 1 .
The middle term is, -18x its coefficient is -18 .
The last term, "the constant", is +81
Step-1 : Multiply the coefficient of the first term by the constant 1 • 81 = 81
Step-2 : Find two factors of 81 whose sum equals the coefficient of the middle term, which is -18 .
-81 + -1 = -82
-27 + -3 = -30
-9 + -9 = -18 That's it
Step-3 : Rewrite the polynomial splitting the middle term using the two factors found in step 2 above, -9 and -9
x2 - 9x - 9x - 81
Step-4 : Add up the first 2 terms, pulling out like factors :
x • (x-9)
Add up the last 2 terms, pulling out common factors :
9 • (x-9)
Step-5 : Add up the four terms of step 4 :
(x-9) • (x-9)
Which is the desired factorization
Trying to factor by splitting the middle term
2.2 Factoring x2-6x-27
The first term is, x2 its coefficient is 1 .
The middle term is, -6x its coefficient is -6 .
The last term, "the constant", is -27
Step-1 : Multiply the coefficient of the first term by the constant 1 • -27 = -27
Step-2 : Find two factors of -27 whose sum equals the coefficient of the middle term, which is -6 .
-27 + 1 = -26
-9 + 3 = -6 That's it
Step-3 : Rewrite the polynomial splitting the middle term using the two factors found in step 2 above, -9 and 3
x2 - 9x + 3x - 27
Step-4 : Add up the first 2 terms, pulling out like factors :
x • (x-9)
Add up the last 2 terms, pulling out common factors :
3 • (x-9)
Step-5 : Add up the four terms of step 4 :
(x+3) • (x-9)
Which is the desired factorization
Canceling Out :
2.3 Cancel out (x-9) which appears on both sides of the fraction line.
Equation at the end of step
2
:
(x - 9) 5
——————— • —————————————————
x + 3 (x + 9) • (x - 9)
STEP
3
:
Canceling Out
3.1 Cancel out (x-9) which appears on both sides of the fraction line.
Final result :
5
—————————————————
(x + 3) • (x + 9)
Rob is saving to buy a new MP3 player. For every $12 he earns babysitting, he saves $5. On Saturday, Rob
earned $72 babysitting. How much money did he save?
If he earned $72, he saved $ (I
Answer:
he saved $42
Step-by-step explanation:
$12-$5= $7
$72/12= 6
$7x6= $42
aSarah is 5 feet and 2 inches tall. What would her height be in centimeters? (1 foot = 12 inches, 1 inch = 2.54 centimeters)
24.409 centimeters
65.08 centimeters
157.48 centimeters
158.496 centimeters
Answer:
12 crossed by 3
Step-by-step explanation:
This is the part 2 could someone solve quickly please!?
Answer: A
Step-by-step explanation: The X axis has to be 25 and the Y axis has to be 45. The rise over run must equal 1.8
Help me solve this problem please num 23
Answer: I got no idea bro sorry
Step-by-step explanation:
Answer:
I worked it out, and the answer i got was 298
WHAT IS THE PERCENT OF DECREASE FROM 1000 to 10
Answer:
(1000-10/10)%
(990/10)%
99%
Help me please. Transition math
Answer:
8 ft^2
Step-by-step explanation:
Since the area of the circle is pi*radius^2, we can plug the values in and get that the area of the circle is 3.14 (approx.) * (6/3)^2, which equals to 3.14*9 ft^2, which equates to 28.26 ft^2.
Hence, the exact area left is 36 - 28.26 ft^2 = 7.74 ft^2, which is closest to 8 ft^2.
Hope this helped!
Please help me with this, I have no idea how to do ratios
the ratio is
2 : 5 , or 40 : 100
sorry if this is wrong, i tried my best.
is this correctly done?
Answer:
Step-by-step explanation:
In my opinion yes I think so
Colin walked a distance of 15 miles in 6 hours.
Work out out
Answer:
Colin walked 2.5 miles every hour
Step-by-step explanation:
The answer is 2.5 because 15 divided by 6 is 2.5
P.S Can I have brainliest?
Dried bananas sell at $4.59/kg and dried apricots sell at $6.59/kg. How many of kilograms of each should be used to make a mixture of 50 kg of dried fruit to sell for $5.20/kg. Solve for substitution or elimination
Answer:
Weight of dried bananas = 34.75 kg
Weight of dried apricot = 15.25 kg
Step-by-step explanation:
Given that:
Cost of dried bananas = $4.59 per kg
Cost of dried apricots = $6.59 per kg
Total weight of mixture = 50 kg
Sales price of dried fruit = $5.20 per kg
To find:
The weight of each type of dry fruit = ?
Solution:
Let weight of dried bananas = [tex]x[/tex] kg
Let weight of dried apricot = [tex]y[/tex] kg
[tex]x+y=50 ...... (1)[/tex]
Total cost of dried bananas = Cost of dried bananas per kg multiplied by weight of dried bananas
Total cost of dried bananas = $4.59[tex]x[/tex]
Total cost of dried apricots = Cost of dried apricots per kg multiplied by weight of dried apricots
Total cost of dried apricots = $6.59[tex]y[/tex]
As per question statement,
Total cost of dry fruits = $5.20 [tex]\times[/tex] 50 = $260
[tex]260 = 4.59x+6.59y......(2)[/tex]
Using substitution:
By equation (1):
[tex]x = 50-y[/tex]
Putting in equation (2):
[tex]260 = 4.59 (50-y)+6.59y\\\Rightarrow 2y = 260 - 229.5\\\Rightarrow y = 15.25\ kg[/tex]
[tex]x = 50 - 15.25\\\Rightarrow x = 34.75\ kg[/tex]
Therefore, the answer is:
Weight of dried bananas = 34.75 kg
Weight of dried apricot = 15.25 kg
ASAP PLZZ Helllllppppp me!!!!
Will Mark BRAINLIEST!!!!
!!!Mega point giveaway!!!
Answer:
180 start line
Step-by-step explanation:
53+x+43=180
96+×=180
×=84
X= 84
Step-by-step explanation:
Explain how you found the equation that represents Aunt Andrea’s decorating plans from the table. NO SAMPLE ANSWERS PLEASE
Answer:
could you posibly put a pic
Step-by-step explanation:
Write the equation of the line that passes through (-1,2) and (2,8) in any form NEED HELLP ASAP!!!
Answer: y=2x+4 for parallel and y=-1/2x+1 1/2
Step-by-step explanation: you need to do an equation using the slope which you can find by using y2-y1/x2-x1
from there you have to use y-y1=m(x-x1)
2.332 divided by 2.2
Answer:
1.06
Step-by-step explanation:
2.332 divided by 2.2
= 1.06
Hope this helped!
Answer:
1.06
Step-by-step explanation:
does 1/4 (3x - 12) = 1/4x - 3 have infinite solutions?
No, I think it has 2 solutions.
Hi can someone help me with this word problem?
One pump can empty a swimming pool in 4 hours while a second pump can empty the same pool in 5 hours. How many hours long will it take the two pumps working together to drain the pool? Round your answer to the nearest tenth.
Answer:
It takes 20/9 hours for both pumps to completely drain the pool.
Step-by-step explanation:
The rate of the first pump is emptying 1/4 of the pool in an hour.
The rate of the second pump is emptying 1/5 of the pool in an hour
The combined rate of these two per hour is
1/4 + 1/5 = 9/20
The time taken to completely drain the pool is 1 (the whole pool) divided by the combined rate. So:
9/20x = 1
x = 1/ ⁹⁄₂₀
x = 20/9
It takes 20/9 hours for both pumps to completely drain the pool.
Put this into the calculator to round to the nearest tenth.
NEED HELP ASAPPPPPPPP MATH PLSS HELPPPPPPP EXAM REWARD BRAINLIEST AND STARS!!!!!!!
Answer:
n+2= 2n
Step-by-step explanation:
hope it helps
...........................
Find the value of each variable listed.
Answer:
a = 90
b = 28
c = 68
d = 22
Step-by-step explanation:
[tex]a = 90[/tex]
[tex]d=22[/tex]
[tex]22+90=112[/tex]
[tex]180-112=68[/tex]
[tex]c=68[/tex]
[tex]62+90=152[/tex]
[tex]180-152=28[/tex]
[tex]b=28[/tex]
Find all real numbers x that satisfy the equation (x-4)(x+3) = 0
Answer:
x=4 and x=-3
Step-by-step explanation:
You have to set each one equal to zero and solve for x
x-4=0 x+3=0
+4 +4 -3 -3
x=4 x=-3
a movie ticket in 2008 cost $10. this year it cost $18
Answer:
inflation is cause of change of price
Step-by-step explanation:
Answer:
The reason movies tickets went up because they raised the minimum wage again.
Please Guys
-4n(5n+6)-5(3+3n)
Answer:
I tried this but i got it wrong it is not b on the test thing
Step-by-step explanation:
oop
Y=-x+10 what is the slope
Answer:
-1
Step-by-step explanation:
y=mx+c
y=-x+10
m=-1
