Answer:
3x+4y=-8
Step-by-step explanation:
Clear the fraction, so multiply by 4, so, 4y=-3x-8
Then move x to the other side by adding 3x to both sides. 3x+4y=-8
(9a^2 + 7a + 8) - (2a^2 + 5a + 1)
Answer: 7a^2+2a+7
Step-by-step explanation:Distribute the Negative Sign:
=9a2+7a+8+−1(2a2+5a+1)
=9a2+7a+8+−1(2a2)+−1(5a)+(−1)(1)
=9a2+7a+8+−2a2+−5a+−1
Combine Like Terms:
=9a2+7a+8+−2a2+−5a+−1
=(9a2+−2a2)+(7a+−5a)+(8+−1)
=7a2+2a+7
The claim is that the standard deviation of the speeds of drivers in Bradford is 8 mph. An experienced driver feels that this is very low. If a random speed check is conducted for 50 drivers, the standard deviation is 10.5 mph. Can we reject the null at
Answer:
Null hypothesis is rejected. Standard deviation is > 8 miles per hour
Step-by-step explanation:
σ [Population standard deviation] = 8 , s [sample standard deviation] = s
n [no of items] = 8
H0 [Null] : σ = 8 ; H1 [Alternate - Right Tail] : σ > 8
χ2 = (n - 1) . s^2 / σ^2
= 49 x (10.5)^2 / 82 = 5402.25 / 64
χ2 = 84.410
df [degree of freedom] = n -1 = 50 - 1 = 49
P value (χ^2 49 > 84.410) = 0.00125
p = 0.0013
p < α ie 0.05
So, H0 is rejected
Hence we state that standard deviation is > 8 miles per hpur
Which of the following are valid names for the given triangle? Check all that
apply.
Answer:
B, E and F hope this is correct
Angie completes 80% of her homework problems before basketball practice. She was assigned 30 problems total. How many problems were completed before basketball practice?
23
24
25
26
Answer:
24 questions
Step-by-step explanation:
you would make the percentage a decimal and times that by how many problems.
Answer:
24 problems
Step-by-step explanation:
I like to do it like this: I find out what 10 percent is, so I divide it by 10. 30/10=3. 10 percent plus 10 percent is 20 percent. That's 6. 100 percent minus 20 is 80 percent. 30 - 6 is 24. Hope this helps.
simplify
3/4 - 4x + 1/2x - 1/2 + 1/2x
Answer:
x=4
Step-by-step explanation:
Answer:
1/4 - 3x
Step-by-step explanation:
Combine like terms
-4x + 1/2x + 1/2x = -3x
3/4 - 1/2 = 1/4
Now put it together
1/4 - 3x
-5/2a+5=25 what does a equal
Answer:
-8
Step-by-step explanation:
What is the answer for
(3/4)(3/5)=
Answer:
9/20 or 0.45
Step-by-step explanation:
we multiply them
3×3/4×5
9/20
or 0.45
help me! :( will appreciate any type of help
Answer:32
Step-by-step explanation: (2+3x)= 98 then solve
A recipe needs 3/4 cups of sugar to make 24 cookies.How much will be needed to make 36 cookies?
Answer:
Step-by-step explanation:
36 cookies = 1.5 times 24 cookies. therefore 1.5 times ¾ c of sugar will be required. Total sugar needed for 36 cookies is 9/8 c or 1.125 c.
2. Find the slope of the line graphed below.
10
9
8
7
6
5
4
3
2
1
2 3 4 5 6 7 8 9 10
3 4 5 6
Step-by-step explanation:
y+6=-2(x-4)
if it is wrong i am sorry
The sum of two numbers is 18. Two less than four times the smaller number is equal to the larger number x. Find the larger number. (Enter an exact number.)
Answer:
14
Step-by-step explanation:
x+y=18
x is the larger number
4y-2=x
(4y-2)+y=18
5y-2=18
y=4
18-4=14
the larger number is 14
What is the product? 2x+8 x2 + 3x-4 x(x-4)(x-1) 20x+4) 2 (x+4)(x-4) 2x(x-1) 2x(x+4)
=−640x10+1280x9+19904x8−40728x7−144488x6+323904x5−162304x4+1024x3+2048x2
step by step
(2x+8x2+3x−4x(x−4)(x−1)(20)x+4)(2)(x+4)(x−4)(2)x(x−1)(2)x(x+4)
=((2x+8x2+3x−4x(x−4)(x−1)(20)x+4)(2)(x+4)(x−4)(2)x(x−1)(2)x)(x+4)
=((2x+8x2+3x−4x(x−4)(x−1)(20)x+4)(2)(x+4)(x−4)(2)x(x−1)(2)x)(x)+((2x+8x2+3x−4x(x−4)(x−1)(20)x+4)(2)(x+4)(x−4)(2)x(x−1)(2)x)(4)
=−640x10+3840x9+4544x8−58904x7+91128x6−40608x5+128x4+512x3−2560x9+15360x8+18176x7−235616x6+364512x5−162432x4+512x3+2048x2
=−640x10+1280x9+19904x8−40728x7−144488x6+323904x5−162304x4+1024x3+2048x2
Two stores are having a donut sale. Donald's Donut Shop is selling 10 donuts for $9.00. Sunrise donut company is selling 8 donuts for $7.00.
a. How much does a donut cost at Donald?
b. How much does a donut cost at Sunrise?
c. Who has the better deal on donuts?
Answer:
A. A donut cost 0.9 at donalds shop
B.a donut cost 0.875 at sunrise
C.the better deal is Sunrise
Step-by-step explanation:
Ken has an investment account which compounds interest continuously at a rate of 3.4%. After 4 years, he has $4400 in the account. How much money did he initially place in the account? Round your answer to the nearest dollar. Do NOT round until you have calculated the final answer.
Answer:
$6617
Step-by-step explanation:
Use the formula for calculating compound interest A=P0ert where A is the unknown, P0=4400, r=0.034, and t=12. Substitute the values into the formula and simplify.
A=4400e0.034⋅12
A=4400e0.408
A=4400(1.503...)
A=6616.75
After 12 years, there will be A≈6617 in the account, rounded to the nearest dollar.
Answer:
$3841
Solve the formula for calculating compound interest
a=Pe rt for
Write an expression that represents the
difference between the areas of the two
shapes.
A= 3x + 3
A = 2x + 6
Answer: x-3
Step-by-step explanation:
3x+3-(2x+6)
= 3x+3-2x-6
3x-2x+3-6
x+3—6
Answer= x-3
An object is moving at a speed of 230 feet per week. Express this speed in inches per
minute. Round your answer to the nearest hundredth.
Answer:
Step-by-step explanation:
0.27 inches per minute....
An object is moving at a speed of 230 feet per week. This speed in inches per minute will be 0.27.
We know ,
1 feet = 12 inches and
1 week= 7days = 24×7 hours = 24×7×60 min.
= 10080 min.
Now, we just need to be careful with our multiplication and division. So we are going to have 230 times 12 on top divided by 24 times 7 times 60 i.e., 10,080 on bottom.
230 feet per week in inches per min = 230×12/10,080.
After evaluating and rounding up to 2 decimal places or the hundredth place , we will get our answer i.e., 0.27 inches/min.
To learn more about speed in inches per minute
visit: https://brainly.com/question/7282361
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Using the algebraic expression 4n + 6, what is the greatest whole-number value that will give you a result less than 100?
Answer:
23
Step-by-step explanation:
Allow 4n+6=100
∴4n=94
∴n=23.5
If 23.5 gives you 100 exactly, the greatest whole number that'll give you a result less than 100 is 23.
A) x=5
B) x= 4
C) x= -1.5
D) x= -2
Answer:
x=-1.5
Step-by-step explanation:
Answer:
B) X=4
Step-by-step explanation:
Since opposite sides of a rectangle are equal that means line AD and line BC are equal to eachother
8x-12=20
+12 +12
8x=32
/8 /8
x=4
A recipe calls for 1 cup of sugar and 5 cups of water how many sugar is used per cup of water
Answer: 0.2
Step-by-step explanation: 1 divided by 5 = 0.2
another way to think of this is 5 x 2 = 10 = 5 x 0.2 = 1
Answer: 0.2
Step-by-step explanation: 1 divided by 5 = 0.2
5 x 2 = 10 5 x 0.2 = 1
Answer C, D Please help will give brainliest.
Answer:
I am not sure what to do you have any pictures
Step-by-step explanation:
At a school, 40% of the sixth-grade students said that hip-hop is their favorite kind of music. If there are 275 sixth-grade students at the school, how many sixth-grade students prefer hip hop music?
Answer:
Around 80 students
Step by step explaining:
My big brain
Lines of latitude, also called parallels, do what?
Answer: Lines of latitude (parallels) run east-west around the globe and are used to measure distances NORTH and SOUTH of the equator.
Step-by-step explanation:
Step-by-step explanation:
yeah what guy below me or above me said
3/45/6 simply this complex fraction
Answer:
1/15/2
Step-by-step explanation:
Divide all the numbers by 3 (the lowest common denominator)
Answer:
90
Step-by-step explanation:
3/45×1/6=3/270=90
A teacher will select 7 students in a class of 10 to participate in a social experiment. How many different groups are possible?
Answer:
the answer is 7/10=0.70
Answer:
7 gropus thats how manh
Lin rode a bike 20 miles in 150 minutes at a constant
speed.
Answer:
7.5 miles per minute
Step-by-step explanation:
What other parts must be equal?
Answer:
Option C GH and JK
Step-by-step explanation:
A S A means angle side angle where the side is subtended in-between the 2 angles
Topic: Similarity and congruency
If you like to venture further, feel free to check out my insta (learntionary). It would be best if you could give it a follow. I'll be constantly posting math tips and notes! Thanks!
Help !!!!!!!!!!!!!!!!!!!!!!
Answer:
D. No function.
Step-by-step explanation:
2400 people attended a football game. 1728 of the people attending supported the home team, while 672 supported the visiting team. What percentage of people attending supported the home team?
Answer:
Percentage= 72%
Step-by-step explanation:
Giving the following information:
Total population= 2,400
People supporting the local team= 1,728
To calculate the percentage of people supporting the local team, we need to use the following formula:
Percentage= (people supporting / total population)*100
Percentage= (1,728/2,400)*100
Percentage= 72%
Theo vegetable garden
Answer:
The area of the garden is 1600
Step-by-step explanation:
BTW your answer is incomplete but if your are asking Theo's vegetable garden has an area of 40 square feet. what is the area, in square feet, of the pat of the garden that is planted with carrots? Then it is 1600! Plz Mark Brainliest Thanks!
If you could change the instrument you play would you or wouldn't you? Tell me why.
PLZ ANSWER I'LL GIVE BRAINLIEST!
Answer:
No, because i wouldn't know how to play it, and you'd get frustrated because you cant play it
Step-by-step explanation:
Answer:
yes because i'm not very good at it. the other instrument i have started to play