Without graphing estimate the x-intercepts of the graph of f(x)=7x^2+9x+1 to the nearest tenth.

Answers

Answer 1
The x-intercepts are at -0.1 and -1.2.

We will use the quadratic formula to find these:
[tex]x=\frac{-b\pm \sqrt{b^2-4ac}}{2a} \\ \\=\frac{-9\pm \sqrt{9^2-4(7)(1)}}{2(7)}=\frac{-9\pm \sqrt{81-28}}{14} \\ \\=\frac{-9\pm \sqrt{53}}{14}=\frac{-9+\sqrt{53}}{14}\text{ or } \frac{-9-\sqrt{53}}{14} \\ \\=-0.1\text{ or }-1.2[/tex]

Related Questions

A hamster wheel has a diameter of 8.5 in. How many inches does the hamster run in one revolution? Use 3.14 to approximate for π .

Answers

The answer would be 26.69. Hope this helps

As hamster wheel is circular so for revolution we will find the circumference.

Diameter of the Hamster wheel = 8.5 in

One revolution of the wheel = circumference of the wheel

Circumference = π × d

π = 3.14 and d = 8.5

So, Circumference = 3.14 × 8.5

Circumference = 26.69 in

So in one revolution the hamster wheel travels a distance of 26.69 in

Perry divides up some candy to give equally to his six friends. If c represents the total amount, write the expression to represent how much candy each friend receives.

Answers

c is the total amount. 

c needs to be divided by 6 to evenly distribute the candy with all 6 friends.

The expression is c÷6.

Hope this helped.

A bag contains 5 red marbles, 7 white marbles, and 6 blue marbles. Find P(red or blue).

Answers

Answer:

P(red or blue) = 5/18 + 6/18 = 11/18

Giovanni justifies whether the expression -4x-8 is equivalent to -2(x+1)-2(x+3)by letting x=3 in both expressions. What is the value of each expression when x=3

3 and -20

4 and 4

-20 and -20

3 and 4

Answers

For this case we have the following expressions:
 -4x-8
 -2 (x + 1) -2 (x + 3)
 Evaluating x = 3 in both expressions we have:
 -4 (3) -8 = -12 - 8 = -20
 -2 (x + 1) -2 (x + 3) = -2 (3 + 1) -2 (3 + 3) = -2 (4) -2 (6) = -8-12 = -20
 Answer:
 the value of each expression when x = 3 is:
 -20 and -20

Factor completely 2x3 + 10x2 + 4x + 20.
2(x3 + 5x2 + 2x + 10)

2[(x + 5)(x2 + 2)]

(2x + 10)(x2 + 2)

(x + 5)(2x2 + 4)

Answers

2x^3 + 10x^2 + 4x + 20
= 2(x^3 + 5x^2 + 2x + 10)
= 2[x^2(x + 5) + 2(x + 5)]
= 2[(x+5)(x^2 + 2)]

answer
2[(x + 5)(x^2 + 2)] 

Answer:

Step-by-step explanation:

Alright, lets get started.

The given expression is :

[tex]2x^3+10x^2+4x+20[/tex]

taking 2 common factor

[tex]2(x^3+5x^2+2x+10)[/tex]

[tex]2(x^3+2x+5x^2+10)[/tex]

[tex]2[(x+5)(x^2+2)][/tex]

So, the correct answer is option B :    answer

Hope it will help :)

HURRYYYYY PLZ
Enter the values for the highlighted variables that show how to subtract the rational expressions correctly:
A
B
C
D
E
F
G

Answers

For a we have:
 x ^ 2 + 6x = x (x + a) = x (x + 6)
 a = 6

 For b we have:
 b = 2

 For c we have:
 x-c = x-6
 c = 6

 For d and e we have:
 bx-x + c = dx-x + e
 b = d = 2
 c = e = 6

 For f we have:
 dx-x + e = x (d-1) + e = x (2-1) + e = x + e = x + f
 e = f = 6

 For g we have:
 (x + f) / (x + 6) = (x + 6) / (x + 6) = g = 1
 g = 1

The school is 625 meters far from Alex house. It took him 15 minutes to go from home to school, and run back to home in 10 minutes. What was Alex's average speed?

Answers

It is given in the question that

The school is 625 meters far from Alex house. It took him 15 minutes to go from home to school, and run back to home in 10 minutes.

Total distance is 625 meters and total time taken is

[tex] (10+15) minutes=25minutes [/tex]

Average speed is

[tex] \frac{total \ distance \  travelled}{total \ time \ taken} [/tex]

[tex] = \frac{625}{25}meter/minute = 25 meter/minute [/tex]

Answer:

25 minutes

Step-by-step explanation:


[WILL GIVE BRAINLIEST]
15 machines work at the same rate.
Together, the 15 machines can complete an order in 8 hours.
3 of the machines break down after working 6 hours. The other machines carry on working until the order is complete.
In total how many hours does each of the other machines work

Answers

your answer is simple times 6 to 3 to get 18 then 15 by 8 to get 96 then add up everything to get 114

there are 50 instruments in lincoln middle orchesha if 1/2 of the instruments are strings. how many strings are in lincoln orchestra

Answers

25 strings bc 50/2= 25

write and solve an inequality for this situation. To honor 50 years of business, All Strikes Bowling is having an anniversary special. Shoes rent for $1.25 and each game is $0.75. If Charlie has $20 and needs shoes, how many games can he bowl?

Answers

Charlie can bowl 25 games.
20 - 1.25 = 18.75
18.75/.75 = 25 games

To honor 50 years of business, All Strikes Bowling is having an anniversary special. The game he can bowl is 25.

What is the unitary method?

The unitary method is a method for solving a problem by the first value of a single unit and then finding the value by multiplying the single value.

To honor 50 years of business, All Strikes Bowling is having an anniversary special.

Shoes rent for $1.25 and each game is $0.75. If Charlie has $20 and needs shoes.

Charlie can bowl 25 games.

= 20 - 1.25

= 18.75

So, he can bowl game

= 18.75/ 0.75

= 25 games

Learn more about the unitary method;

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What is the decimal equivalent of the fraction?

4/30

A) 0.13⎯⎯⎯⎯
B) 0.13​
C) 0.1⎯⎯3
D) 0.13⎯⎯

Answers

4/30

4 ÷ 30 = 0.13 (3 goes on forever)

I am assuming the answer is A) 0.13 ---------------------
because the line is longer.

Answer:

Option A  [tex]\frac{4}{30}=0.13333...=0.1\bar3[/tex]

Step-by-step explanation:

Given : Expression [tex]\frac{4}{30}[/tex]

To find : What is the decimal equivalent of the fraction?

Solution :

Step 1 - Write the fraction

[tex]\frac{4}{30}[/tex]

Step 2 - Divide the numerator by denominator,

[tex]\frac{4}{30}=0.13333...[/tex]

or [tex]\frac{4}{30}=0.13333...=0.1\bar3[/tex]

Therefore, Option A is correct.

Are these ratios equivalent?

84,000 paintings for every 16,000 photographs

63,000 paintings for every 12,000 photographs

Answers

Yes they are the both equal 5.25 when divided

according to the graph........

Answers

I would say the best answer is a but the whole thing is set up weird

The solution is:

H(w) gets very small when w gets very large .

What is graph?

In mathematics, the graph of a function f is the set of ordered pairs, where {\displaystyle f(x)=y.} In the common case where x and f(x) are real numbers, these pairs are Cartesian coordinates of points in two-dimensional space and thus form a subset of this plane.

Here, we have,

Considering the graph H(w),

As w gets larger, H(w) continues to approach a horizontal asymptote.

we know that,

A horizontal asymptote of a graph is a horizontal line y = b where the graph approaches the line as the inputs approach ∞ or –∞. A slant asymptote of a graph is a slanted line y = mx + b where the graph approaches the line as the inputs approach ∞ or –∞.

Hence, H(w) gets very small.

Therefore, the correct option is option D

Hence, The solution is:

H(w) gets very small when w gets very large .

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which equation models the population (in millions), p, of austinberg t years after january 1, 2000

Answers

The answer is.................


A!!!!!!!!!!!!

Alfonso went to famous Sam’s appliance store

Answers

This is a true statement, or false depending on whether Alfonso actually did or not. There's no proof.

∠AZB and ∠CZB are supplementary. The m∠AZB = 2x - 4 and m∠CZB = 8x + 4. What is the measure of each angle?

A. m∠AZB = 32° and m∠CZB = 148°
B. m∠AZB = 12° and m∠CZB = 76°
C. m∠AZB = 43° and m∠CZB = 22°
D. m∠AZB = 68° and m∠CZB = 292°

Answers

The answer is A because when you add the angles to get they equal 180. Then just solve for x.

The drawing isn't to scale
The correct answer is A. m∠AZB = 32° and m∠CZB = 148°

Anthony observes that when people are leaving class, about 50% turn left and about 50% turn right. Anthony wants to estimate the probability that fewer than 3 of the first 4 students will turn left when leaving class tomorrow. To do this, he lets H represent turning left when leaving class and T represent turning right. He then flips a coin 4 times, recording the results. He repeats this process for a total of 20 trials. HHTT THHT HTTT HTHH HHTT HTHT THTH TTHH HHHH HTTH HHHT TTHT THHH THTH HHTT HTTT HTTH HHTT HTHH HHTH Drag and drop the correct fraction to the box to estimate the probability, using this simulation. Estimated probability that fewer than 3 of the first 4 students leaving class tomorrow will turn left:

Answers

The probability is 7/10.

There are 14 outcomes in this simulation with fewer than 3 left turns, out of 20 times the simulation was run:
14/20 = 7/10

The fact that Anthony repeats the test [tex]n[/tex] times doesn't change anything, because he already know that you have a 50/50 chance of turning left of right.

Given that, Anthony observes that when people are leaving class, about 50% turn left and about 50% turn right.

What is the probability?

Probability can be defined as the ratio of the number of favorable outcomes to the total number of outcomes of an event.

H represent turning left when leaving class and T represent turning right,

Both of them have a 50% probability of happening and he wants to know the probability of less than 3 turn left so we want to know the probability for only one to turn left and the probability for only two.

Only one:

If you use the fact that we have a binomial distribution, then the possibility that only one turns left is:

So, [tex]P(1)=\frac{4!}{3!} \times0.5^{4[/tex]

= 4×0.0625 = 0.25

Only two with the same reasoning.

[tex]P(2) = \frac{4!}{(2!\times2!)} \times0.0625=6\times0.0625 = 0.375[/tex]

Here you can see that the probability is bigger because here are mass  combinations that in the previous case.

So the total probability is 0.25 + 0.375 = 0.625.

The fact that he repeats the test [tex]n[/tex] times doesn't change nothing, because he already know that you have a 50/50 chance of turning left of right.

To learn more about the probability visit:

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A rectangular bathtub is 5 1/2 feet Long, 1 1/2 feet wide, and 3 feet high. Daniel fills the tub to a depth of 2 feet. What is the volume of the water in the tub?

Answers

we know that
[volume of a rectangular prism]=L*W*H
for
L=5 1/2 ft-----> (5*2+1)/2----> 11/2 ft
W=1 1/2 ft----> (1*2+1)/2----> 3/2 ft
H=2 ft 
so
volume of the water in the tub=(11/2)*(3/2)*2---> 16.5 ft³

the answer is
the volume of the water in the tub is 16.5 ft³

Dirk can clean a playground in 5 hours. Geralyn can clean a playground in only 4 hours. Which of the following can be used to determine the amount of time it would take for Dirk and Geralyn to clean a playground together?

Answers

The answer is inthe pic

Kevin had 6 nickles and 4 dimes in his pocket. If he took out one count and then a second coin without replacing the first coin-
what is the probability that both coins were nickels?
what is the probability that both coins were dimes?
what is the probability that the first coin was a nickel and the second a dime?

Answers

To find each probability you will state the probability of the first event happening and multiply it by the chance of the second event happening.  

P(2 Nickels):  6/10 x 5/9 = 30/90 (1/3 chance)

P(2 Dimes):  4/10 x 3/9 = 12/90 (4/30 chance)

P(1 nickel and 1 dime): 6/10 x 4/9 = 24/90 (8/30 chance)

In this detailed answer, the probabilities of drawing two coins from Kevin's pocket - with 6 nickels and 4 dimes - are explained. The probabilities of both coins being nickels and dimes are 0 due to the lack of replacement, while the probability of one nickel and one dime is 4/15.

To calculate the probabilities of drawing coins from Kevin's pocket, where he has 6 nickels and 4 dimes:

Probability both coins are nickels: Since each draw affects the remaining number of nickels and dimes, the probability is 0.

Probability both coins are dimes: Similarly, as the draws are not independent, the probability here is also 0.

Probability of one nickel and one dime: Since Kevin has 6 nickels and 4 dimes, the probability of drawing a nickel first is 6/10 (6 nickels out of 10 coins) and drawing a dime second is 4/9 (4 dimes remaining out of 9 coins), which equals 24/90 or 4/15.

Jennifer works in a flower shop on Saturday she started work at 8:45 a.m. she spent 3/4 hours at lunch she finished at 4:15 p.m. how many hours did she work on Saturday?

Answers

8.45am to 3.45pm = 15 - 8 = 7 hours

3.45pm to 4.15pm = 30 minutes

3/4 hours = 45 minutes

7 hours 30 mins minus 45 minutes = 6 hours 45 minutes

Answer : She worked 6 hours 45 minutes on Saturday.

Hope this helps. - M

what is the value of B in the equation y ^ b ^ 4 equals 1 / y ^ 24

A) -20
B)-6
C)6
D)20

Answers

Step-by-step explanation:

y^b^4=1/y^24

y^b^4xy^24=1

b^4y^25=1

b^4=1/y^25

√b^4=√1/y^25

b=√1/y^25

It's B. -6

apparently i have to write at least 20 characters so,,,, sorry yall.

A number j minus 14 is less than −21.

Answers

If you are supposed to write the inequality, it would be
j - 14 < -21
j represents the number j
minus 14 is taking away or subtracting 14
together, they are less than -21, which is why < is used
A number j minus 14 is less than −21
j - 14 < -21

if you need to find j then
j - 14  < -21
  +14   +14
j < -7

hope it helps

if cos a = 3/5 in the first quadrant, what does cot a equal

Answers

Given that cos a = 3/5 and it is in the first quadrant :
then:
a=arccos 3/5
but
cot θ=1/tan θ
thus to evaluate our vale we shall obtain the value for height since
adjacent=3
hypotenuse=5
thus
using Pythagorean theorem:
c²=a²+b²
hence
5²=3²+b²
b²=25-9=16
b=4
thus
tan θ=opposite/adjacent
tan a=4/3
thus
cot a=1/(4/3)=3/4

Final answer:

To find cot a when cos a = 3/5 in the first quadrant, we first determine the length of the opposite side using the Pythagorean theorem, which gives us 4. Subsequently, cot a is calculated as the ratio of the adjacent to the opposite side, resulting in cot a = 3/4.

Explanation:

If cos a = 3/5 in the first quadrant, we use trigonometric identities to find cot a. First, recognize that in a right triangle, the Pythagorean theorem states a² + b² = c². Given cos a = adjacent/hypotenuse = 3/5, and the fact that we are in the first quadrant (where all trigonometric values are positive), we can solve for the opposite side using the Pythagorean theorem.

Let the opposite side be b, the adjacent side (corresponding to cos a) be 3, and the hypotenuse be 5. The equation becomes b² + 3² = 5² which simplifies to b² = 25 - 9 = 16, giving b = 4.

We know that cot a = adjacent/opposite = cos a / sin a. Thus, sin a = b / hypotenuse = 4/5. Therefore, cot a = 3/4.

At what position does the ball have its maximum potential energy
A) a
B) d
C) f
D) g

Answers

Potential energy is the energy possessed by an object because of its position. 
So it is D the highest point of the trajectory. 
The answer is B D because of the position of the ball and it’s maximum potential energy

Find the area of the trapezoid.
A) 18 cm2
B) 22.5 cm2
C) 27 cm2
D) 45 cm2

Answers

Answer:

27 cm2

Step-by-step explanation:

The answer is 27 cm 2 because if you use length x base x height you would get your answer. So 6 x 3 x 3 = 54 and then if you divide that by 2 you would get 27

Answer:

the answer is C), 27 cm2

Step-by-step explanation:

A student has successfully passed 60 percent of the 20 quizzes he has written so far. If the student writes 50 quizzes during the year, and successfully passes 80 percent of the remaining quizzes, what is his percent success rate for all his quizzes for the entire year? help

Answers

His percent success rate is 72%

Answer:

74.29%

Step-by-step explanation:

A student passed 60%, or a proportion of 0.60 of the 20 quizzes he's written so far. This means he has passed [tex]0.60*20=12[/tex] quizzes so far.

Now he has written 50 quizzes and passed 80% of them, or [tex]50*.8=40[/tex] quizzes.

To find the success rate, take the number of quizzes passed and divide by total number of quizzes.

[tex]\frac{Passed}{Total}[/tex]=[tex]\frac{12+40}{20+50}[/tex]=[tex]\frac{52}{70}[/tex]=.7429

To get a percentage, multiply this proportion by 100 to get 74.29%

LAST QUESTION!! PLEASE HELP!

Answers

7. previously answered in another question, but last choice is correct

8.  yes a diameter is a chord. A chord is any line that connects 2 points on a circle

What’s $54.00 for 3 tickets in unit rate

Answers

It would be $18 because you would divide 54 by 3 and get $18 per ticket

Numbers 37 and 39. I’m not sure how to solve them

Answers

37. 3/8 hours

You can get this by dividing 3/4 by 2. 

The key to doing these types of problems is remembering that if they are going faster by that much, it doesn't matter what the speeds are. You can treat it as if one is standing still and the other is going 2mph. 
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