Answer:
Step-by-step explanation:
f(z)=3(-9)^2+10(-9)-6
f(z)=3(81)-90-6=243-96=147
.
A bike race requires entrants to submit their best times before the race in order to qualify to participate. Bikers must be able to complete the 50-mile course in 2 hours or less.
Which of these times qualify for the race, assuming each biker rides at a constant rate? Choose the three correct answers.
1.Maria rode 75 miles in 2 hours and 45 minutes.
2.Travis rode 36 miles in 1 hour and 20 minutes.
3.Trish rode 63 miles in 3 hours.
4.Crystal rode 24 miles in 56 minutes.
5Carl rode 22 miles in 1 hour.
Answer:
1, 2, 5!
Step-by-step explanation:
1. Maria rode 75 miles in 2 hours and 45 minutes.
2. Travis rode 36 miles in 1 hour and 20 minutes.
5. Carl rode 22 miles in 1 hour.
hope this helps!!!!!!
plz mark brainliest!
Pl help it for homwork
Answer:
C) x=2 y=-5
y=7x-19
-2x+3(7x-19)=-19
19x=38
x=2
-2(2)+3y=-19
y=-5
On a highway, you take 3 seconds to increase your speed from 32 to 35 miles per hour. Your speed increases the same amount each second. The speed limit is 65 miles per hour. What is the domain of the function?
Answer:
1 to 30 seconds
Step-by-step explanation:
3 seconds increases your speed from 32 to 35 miles per hour
Hence 3 seconds = 3 miles per hour(35-32 miles)
1 second = 1 mile
The function for the increase per mile is therefore:
f(x)= 1x
Where x is number of seconds travelled on the highway
The domain of a function are the possible input values for x. Since the speed limit on the highway is 65 miles, the input values for x cannot be more than 30 seconds(current speed is 35 miles per hour, 65-35=30)
Solve for x. -4(-2x - 2) + x - 2 = -48
Answer:
x = -5.7778
Step-by-step explanation:
1) 8x + 8 + x -2 = 48 (You multiply the -4 into both -2x and -2, thus getting rid of the brackets)
2) 9x + 6 = -48 (Add the two values of x (8x + x) and then subtract the 2 from 8 = 6)
3) 9x =-46 - 6 (Move the 6 mover, which will change its sign from a (+) to a (-6))
4) 9x = -52 (Do the expression, and you get -52)
5) x = -52 / 9 (Isolate the x, by dividing both sides by it)
6) x = -5.7778 (Round the answer)
Carina drinks 96 ounces of water in an 8-hour workday. Which expression can be used to calculate the number of ounces of water that Carina drinks each hour?
A. 96/8
B. 8/96
C. 96x8
D.96+ 8
PLEASE HELP
Answer:
A
Step-by-step explanation:
Please answer correctly !!!!!!!!!! Will mark Brianliest !!!!!!!!!!!!!!!!
9514 1404 393
Answer:
DJ = 48
Step-by-step explanation:
The centroid (J) divides the median into parts that have the ratio 2:1.
DJ : JH = 2 : 1
DJ : (DJ +JH) = 2 : (2+1)
DJ : DH = 2 : 3
DJ = (2/3)DH = (2/3)(72)
DJ = 48
The elementary Robotics Club is going on a field trip to the Kennedy Space Center. They will need to rent minivans to get to their destination. There are 35 fourth graders and 40fifth graders in the Robotics Club. Each minivan can only hold 8 people. How many minivans does the school need to rent?
Answer: 10 minivans .
Step-by-step explanation:
Given: There are 35 fourth graders and 40fifth graders in the Robotics Club.
Total people = 35+40 = 75
Since each minivan can only hold 8 people.
Number of minivan required = (Total people) ÷ 8
= 75 ÷ 8
= 9.375≈ 10
Hence, the school needs to rent approx. 10 minivans .
Which of the following lists is ordered from least to greatest?
-5, 0, 0.8, 1, 1
-3, -5, 0, 0.8, 1
-5, 0, 0.8, 1, 1
1, 0.8, , 0, -5
plz hurry and answer this
Answer:
-5,0,0.8,1,1 is the answer
A company has two factories, factory A and factory B. The cost per item to produce q items in factory A is
200 + 3/q
q
. The cost per item to produce q items in factory B is
300 + q/
3q
. Find an expression for the sum of these costs per item. Then divide this expression by 2 to find an expression for the average cost per item to produce q items in each factory.
The average cost per item to produce q items in each factory is
Answer:
(700 + 51q)/4qStep-by-step explanation:
Given costs:
(200 + 13q)/q and (300 + 25q)/2qSum of the costs:
(200 + 13q)/q + (300 + 25q/2q) =(400 + 26q)/2q + (300 + 25q)/2q =(700 + 51q)/2qAverage cost is sum divided by number:
(700 + 51q)/2q ÷ 2 = (700 + 51q)/4qIf J M = 9 and K M = 4 , what is the approximate perimeter of Δ J K L ? 26.2 26.2 29.8 29.8 31.0 31.0 31.7
Answer:
Correct option is (a)
Step-by-step explanation:
According to question in the triangle ΔJKL
JK = 9 and KL =4
according to the condition of triangle sum of two sides must be greater than the third side
Here sum of its two sides is 9 + 4 = 13
⇒ third side must be greater than 13 say 13.2 = JL
therefore, perimeter of triangle ΔJKL is
JK + KL + JL = 9 + 4 + 13.2 = 26.2
Therefore correct option is (a)
Given this equation of the function f(x)=7x+9. Find f(−2).
Answer:
f(-2) = -5
Step-by-step explanation:
Given
f(x) = 7x + 9
f (-2) = 7 * ( - 2) + 9
= - 14 + 9
= - 5
Jenna competes in the high jump. Her best jump in the first meet is 414 feet. Her best jump in the second meet is 456 feet. Enter an expression, using equivalent fractions with a common denominator, to model how much the height of her jump increased.
Answer: [tex]\dfrac{7}{69}[/tex] of height has been increased in second jump from the first jump.
Step-by-step explanation:
In first meet, height of best jump = 414 feet
In second meet, height of best jump = 456 feet
Increase in height = 456 feet - 414 feet
= 42 feet
The fraction of increased in height = [tex]\dfrac{\text{Change in height}}{\text{previous height}}[/tex]
[tex]=\dfrac{42}{414}\\\\=\dfrac{7}{69}[/tex]
Hence, [tex]\dfrac{7}{69}[/tex] of height has been increased in second jump from the first jump.
Solve for n.
n/4 + 5 = 10
Answers appreciated :)
Ellie bought a pair of jeans on sale for 15% off. If the jeans were originally $35, how much did she save?
Answer:
she saved $5.25
Step-by-step explanation:
Answer: She saved $5.25
Step-by-step explanation: 15% of $35 is $5.25
6x + 57= 135 solve x
Answer:
can't find answer sorry
Which equation is a linear function?
y=2^x -1
y=x/2-5
y=2/x +3
y=x^2 +7
Answer:
Second Choice.
Step-by-step explanation:
[tex]y = mx + b[/tex]
That is the linear function. Any coefficients with higher degrees won't be considered as a linear function.
So we can cut out the first and last choice.
Then we have only two choices which are
[tex]y = \frac{x}{2} - 5 \\ y = \frac{2}{x} + 3[/tex]
The second equation is called Rational Function where a variable is a denominator.
Therefore, the correct answer is second choice.
Determine the 16th term in the sequence defined by: A_n = 5–2(n-1)
Answer: 45
Step-by-step explanation:
[tex]a_{n} = 5 - 2(n - 1)\\a_{16} = 5-2 (16-1)\\a_{16} = 5-2 (15)\\a_{16} = 3 (15)\\a_{16} =45[/tex]
Answer:
-25Step-by-step explanation:
aₙ = 5–2(n-1) = 5 - 2n + 2 = 7 - 2nSubstitute n with 16 for the 16th term
a₁₆ = 7 - 2(16) = 7 - 32 = -25
Which equation represents a line with
a slope of 2 and a y-intercept of 4
Step-by-step explanation:
Slope (m) = 2
y - intercept (c) = 4
Now the equation of the line is given by
y = mx + c
y = 2x + 4
Hope it will help :)
Unit rate (grade 8)
Franklin needs 2.75 cups of flour for every 1.5 cups of sugar in his cookie recipe. This will yield 3.5 dozen cookies. What is the unit rate for sugar per cookie? Round your answer to the tenths place.
Answer:
7.38
Step-by-step explanation:
Cell phone Plan A costs $70 per month and comes with a $100 phone. Cell phone Plan B costs $50 per month and comes with a $200 Phone. How many months is it until the cost for both plans is the same?
Answer:
5 months
Step-by-step explanation:
100+70(5)= 450
200+ 50(5)= 450
3/8 divided by -0.25
Answer:
thw answer is -3/2 and in decimal form its -1.5
Step-by-step explanation:
hoped I helped:)
Multiple Choice The perimeter of a square
is 68 m. If one side is represented by 3x + 2,
what is the value of x?
A 3
B 5
C 4
D 6
E 10
Answer:
The answer is B, 5.
Step-by-step explanation:
3x+2 is per side. A square has 4 sides. 3x+2 times 4 is 12x+8 (using the distributive property).
12x+8 = 68
12x = 60
divide both sides by 12...
60/12 = 5.
Therefore x =5
Ellie bought a pair of jeans on sale for 15% off. If the jeans were originally $35, how much did she save?
Answer:5.25
Step-by-step explanation:
Uma escola possui 2500 alunos matriculados e 1200 foram selecionados para participar de um concurso de redação. Qual é a razão que representa o total de alunos selecionados?
Answer:
12:25
Step-by-step explanation:
Número de alunos matriculados: 2.500
Número de alunos selecionados: 1.200
A proporção que representa o número total de alunos selecionados em relação ao número de alunos matriculados é dada como:
Número de alunos selecionados: Número de alunos matriculados
= 1200: 2500
= 12 : 25
The population of wild rabbits, in thousands, in Wisconsin can be modelled by the following equation f(x)=9(1.01)x where x represents the number of years after the scientists started counting. How many wild rabbits, in thousands, will be in Wisconsin in 15 years?
Answer:search that up and find the answer on brainly
Step-by-step explanation:
Write the number
five million four thousand three hundred
in standard form
Evaluate:
(15 +12) -3² = ?
Answer:
The answer is 8 I think. Hope this helps
Lupe's car averages 27 miles per gallon of gas. At that rate, how far would it go on 27 gallons?
Answer
129
Step-by-step explanation:
just multiply 27 by 27... then covert it
Answer:
729 kilometers
hope this helped :-)
Step-by-step explanation:
27x27=729
just multiply 27 by 27 :-)
Bernice deposited $12 in a savings account that earns 2.3% simple interest. Which graph represents this scenario?
Answer:
what graphs?
Step-by-step explanation:
yeah put the graphs on here and someone will answer it
answer the whole question