Answer:
d = 3 and d = 3/4
Step-by-step explanation:
This is a quadratic eqution. Let's use the quadratic formula to solve it.
If ax^2 + bx + c = 0, then:
-b ± √(b^2 - 4ac)
x = ---------------------------
2a
With a = 4, b = -15 and d = 9, we have:
-(-15) ± √(225 - 4(4)(9) ) 15 ±√81 15 ±9
d = ------------------------------------ = -------------- = -------------- = 24/8 and 6/8
2(4) 8 8
Simplifying these results, we get d = 3 and d = 3/4
For his birthday, Mr. Robin and four of his friends went to a Math museum to learn about new intergalactic math. They each got a ticket for $12.00 and each bought the same calculator at the gift shop. If Mr. Robin spent $110 for the group's tickets and calculator, how much did each calculator cost? Write and solve an equation to describe this situation.
Answer: $10
Step-by-step explanation:
Given
Robin and his four friends bought tickets for [tex]\$12[/tex] each
If each one of them bought a calculator then the total spendings are [tex]\$110[/tex]
Suppose the cost of each calculator is [tex]\$\ x[/tex]
Cost per person is given by [tex]x+\$12[/tex]
For the group, it is [tex]5(x+12)[/tex]
Equate this to total spendings
[tex]\Rightarrow 5(x+12)=110\\\Rightarrow x+12=22\\\Rightarrow x=\$\ 10[/tex]
thus, the cost of each calculator is [tex]\$ 10[/tex]
solve pls |2c+7|-3>4
:(
Answer:
E
Step-by-step explanation:
2c + 7 > 0
2c > -7
c > -7/2
If c < -7/2
-2c -7 -3 > 4
-2c > 14
c < -7
if c > -7/2
2c + 7 -3 >4
2c >0
c >0
Find the circumference of a circle with an area
of 95.03 m.
Round to the nearest tenth.
Blank 1:
Answer:
The circumference of the circle is 34.56
Step-by-step explanation:
.
Patricia’s dog, Max, weighs 6.75 kilograms. There are approximately 0.45 kilograms in 1 pound. Which measurement is closest to the number of pounds Max weighs?
hurry ....
Answer: 14.88 is the answer
Step-by-step explanation:
HELPPP PLEASE nearest tenth
Answer:
8.8
Step-by-step explanation:
(0,6) and the slope is 3
Answer:
Step-by-step explanation:
y-intercept (c)= 6
slope (m) = 3
Writing in slope intercept form
y = mx + c
y = 3x + 6
hope it helps :)
Mr. Jackman gives $32.00 to his four children to share equally. How much will each of his children get?
Answer:
$8.00 per child
Step-by-step explanation:
Mr. Jackman= $32
Children= 4
per child= $32/4
$8.00
Are the ratios 1:20 and 2:4 equivalent?
Answer:
no
Step-by-step explanation:
Answer:
Simple answer, no.
A cylinder has a diameter of 5 inches. Which equation can be used to find V, the volume of the cylinder in cubic inches?
Answer:
V= π*2.5^2*h
Step-by-step explanation:
Given data
Diameter d= 5 in
radius=d/2= 5/2= 2.5in
We know that the formula for the cylinder volume is given as
V= πr^2h
substitute
V= π*2.5^2*h
Hence the expression for the volume with a given height is
V= π*2.5^2*h
if you get it correct within March 27 2021 I will give you 15 points
Two trains on opposite tracks leave the same station at the same
time. One train travels at an average speed of 80 kilometers per
hour and the other travels at an average speed of 70 kilometers
per hour. How long after they leave the station will they be 50
km apart?
Answer: The answer is 1/3 hour, or 20 minutes
Step-by-step explanation:
The combined rate of separation is (80 km/hr + 70 km/hr) = 150 km/hr,
therefore they will be 1/3 of 150 km apart after traveling 1/3 of an hour.
I HOPE THIS HELPED YOU LOL
rita swam 300 john swam 900 rodell swam 925 If the swimmers received $2 for every lap they swam, how much did each swimmer earn for chairity
Answer:
rita- $600 John- $1800 Rodell- $1850
Step-by-step explanation:
You multiply the laps by how much they make for each lap
I need help ASAP please
Answer:
45/75
Step-by-step explanation:
Because B and A goes together
Plz help me do this. Thank you in advance. Do the ordered pairs as well :)
Answer:
y=3*(-2)
y=--(3*2)
y=-6
y=-6
y=0x-6
y=0x+(-6)
y=0x+(-6),m=0
y=0x+(-6),m=0,b=-6
m=0,b=-6
y=3x(-2)
Let x be the domain values.
Let x = -1
y = 3(-1) - 2
y = -6 - 2
y = -8...range
Our first ordered pair is (-1, -8).
Let x = 2
y = 3(2) - 2
y = 6 - 2
y = 4...range
Our second ordered pair is (2, 4).
Let x = 4
y = 3(4) - 2
y = 12 - 2
y = 10...range
Our third ordered pair is (4, 10).
Done.
Becky borrowed $580.00 from the bank. The loan had a 13.5% simple annual interest rate, and she paid off the bill over 1.5 years. What was the total amount, including interest, Becky paid for the loan?
Answer:
697.45
Step-by-step explanation:
interest for the first year = 13.5 % of 580 = 78.3
for 0.5 year, it will be 78.3 /2 =39.15
1year + 0.5 year = 78.3 + 39.15= 117.45
add that to borrowed amount to get total amount paid
117.45+ 580= 697.45
What fraction is equivalent to 135/15
Paul finished his 800 meter race in 2 minutes and 2 seconds. Jeff finished in 121 seconds. Who finished first? (PLESES SHOW WORK)
Answer:
Jeff finished first
Step-by-step explanation:
To solve this equation, I can either converts 2 minutes 2 seconds to seconds or convert 121 seconds to minutes
CONVERT 2 MINUTES 2 SECONDS TO SECONDS
60 seconds = 1 minutes
to convert 2 minutes 2 seconds to seconds, multiply 2 minutes by 60 and then add 2 seconds to it
2 x 60 = 120 seconds
120 seconds + 2 seconds = 122 seconds
Paul finished in 122 seconds while Jeff finished in 121 seconds. Jeff finished first
CONVERT 121 SECONDS TO MINUTES
60 seconds = 1 minutes
To convert 121 seconds to minutes, we have to divide by 60
121/60 = 2 minutes 1 second
Paul finished the race in 2 minutes 2 seconds while eff finished the race in 2 minutes 1 second. Jeff finished first
What is the value of x in the figure? Enter your answer in the box.
Answer:
65
Step-by-step explanation:
please help i’ll give brainliest if you help thanks
Answer:
84
Step-by-step explanation:
What I did was simple. I just plugged it into my calculator and let it get to work. If you don't have a calculator, use your phone or computer. There should be calculators on both of these.
Please let me know if you need any more help. Hope this helps!
Please help I only have one try. I don't get it because when I plug in the pairs, all of them are not true.
Answer:
The answer would be the third one (12,0)
Emma's Pizza can make 12 pizzas in 40 minutes. How many pizzas can they make in 5 hours?
Answer:
90
Step-by-step explanation:
Change 5 hours to minutes. (5x60, and 300 minutes)
Divide 300 by 40. (7.5)
Then, multiply 7.5 by 12 (90)
Answer:
90 pizzas
Step-by-step explanation:
We know 5 hours = [tex]5\times60 = 300[/tex] minutes
If you consider 20 minutes as a period, 5 hours .as well as 300 minutes. contains [tex]\frac{300}{20} = 15[/tex] periods.
Emma can make 12 pizzas in 40 minutes.
So she can make 6 pizzas in 20 minutes (in half time)
In 1 period she makes 6 pizzas.
In 15 periods she makes [tex]15\times6 = 90[/tex] pizzas (Answer.)
At a movie theater, the size of popcorn bags decreased by 20%.
If the old bags held 15 cups of popcorn, how much do the new bags hold?
Answer:
12 cups
Step-by-step explanation:
I'm pretty sure you just take 20% of 15.. which is 3 and then you would do 15-3 which is 12. Hope this helps! <3
Answer:
12 cups
Step-by-step explanation:
if the volume decreases by 20%, that means 80% is left.
Solve by 15 x .8
Find the surface area
Please explain
Step-by-step explanation:
There are two trapezium(s), area of 2:
= 2 [½ x (sum of || sides) x height]
= 2[½ x (4 + 8) x 4.6 ] [not clearly visible if it is 4.5 or 4.6]
= 55.2 yd²
Area of vertically tilted rectangles
1): area = 5 x 4 = 20 yd²
2): area = 5 x 4 = 20 yd²
Total area = 20 + 20 = 40 yd²
Area of horizontal rectangles:
1): area = 4 x 8 = 32 yd² [upper]
2): area = 4 x 4 = 16 yd² [lower]
Area of given surface = 55.2 + 40 + 32 + 16 = 143.2 yd²
the slope of the points (8,6) and (2,-2)
Answer:
4/3
Step-by-step explanation:
m = slope
m = y2 - y1 / x2 - x1
m = -2 - 6 / 2 - 8
m = -8 / -6
m = -8/-6
Negative + Negative = Positive
m = 8/6
Both numbers have a common factor of 2
m = 8 ÷ 2 / 6 ÷ 2
m = 4/3
WILL GIVE BRAINLIEST!
Given that m∠a = 53°, find m∠b.
m∠b =
°
Answer: 143
90-53=37
180-37=143
Answer:
Step-by-step explanation:
The angle left to b is
90° - a
= 90° - 53°
= 37°
So now
< b + 37° = 180° ( being linear pair )
< b = 180° - 37°
< b = 143°
Which equation represents a nonlinear function? y=−85x+19.4 y = − − 8 5 x + 19.4 y=−12x2−7 y = − − 1 2 x 2 − − 7 y=x4+x y = x 4 + x y=32−4x
Answer:
The answer is below
Step-by-step explanation:
The options are not clear. I would solve a similar question.
A linear function is a function in the form:
y = mx + b; where y and x are variables, m is the slope and b is the y intercept.
From the options:
a) y = 3x³
Since the equation is not in the form of y = mx + b, hence it is not a linear function. It is a nonlinear function.
b) 3x + 2y = 10
2y = -3x + 10
The equation is in the form of y = mx + b, hence it is a linear function.
c) y = 15.3
The equation is in the form of y = mx + b, hence it is a linear function.
d) y = (1/4)x - 2
The equation is in the form of y = mx + b, hence it is a linear function.
Solve for k, the constant of variation, in an inverse variation problem where y=17 x=6
Answer:
k = 102
Step-by-step explanation:
Inverse variation is represented as follows:
y = k/x
Find k by substituting 17 for y and 6 for x:
17 = k/6
Multiplying both sides by 6 results in k = 102
Javon's first 3 quizzes had a mean score of 90%. If he scores 46% on his next quiz,what will be his mean quiz score for these 4 quizzes?
Answer: 79%
Step-by-step explanation:
Javon's first 3 quizzes had a mean score of 90%. This means that his total score will be:
= 90% × 3
= 270%
Since he scores 46% on his next quiz, we add it to the previous score and this will be:
= 270 + 46
= 316
Then, his mean quiz score for these 4 quizzes will be:
= Total score / Number of quizzes
= 316 / 4
= 79%
Answer:
79%
Step-by-step explanation:
316 / 4 = 79%
sin 2A + sin 5A-sin A÷
cos A + cos 2A + cos 5A
Answer:
Step-by-step explanation:
(sin5a-sina)+sin2a/(cos5a+cosa)+cos2a
=2cos3asin2a+sin2a/2cos3acos2a+cos2a
=sin2a(2cos3a+1)/cos2a(2cos3a+1)
=sin2a/cos2a
=tan2a
I need help with this
Answer:
4th one
Step-by-step explanation:
The price of a new gaming PC was increased from $280 to $364. By what percentage was the price of the gaming PC increased?
MY LAST QUESTION PLZ HURRY
Answer:
1.3%
Step-by-step explanation: