help please thanks

Which trinomials are perfect square trinomials?

Select each correct answer.

a2+15a+75

a2+26a+169

a2+14a+49

a2+4a+16

Which expressions are differences of squares?

Select each correct answer.

t2−4

h2−20

x2−169

a2+1

Answers

Answer 1
Answer: Perfect squares are the middle two. Difference of squares are t^2 -4 and x^2 - 169

First, to be a perfect square the last term must be a perfect square number. Only 169, 49 and 16 are perfect squares. Second, the middle term must be twice the square root of the last term.  

You can check this by using foil on the following expression:
(x + 13)(x + 13) You will get x^2 + 26x + 169 which is one of the perfect square trinomials.

For the difference of squares, you must be using subtraction and have two perfect squares.



Answer 2
t^2 - 4 and x^2 - 169 are the right answers, just took the test.

Related Questions

a line inintersects at triangle at least once, but not at any of its vertices. What is the maximum number of sides that a line can intersect a triangle? similarly, a square? a convex quadrilateral? A quadrilateral , in general?

Answers

I think it's the quadrilateral in general

what are alternate interior angles??

Answers

Alternate interior angles are those which are on the inside of the parallel line and are alternate to eachother. 

hope this helps :)

vince begin practicing up on a piano at 5:15 p.m. he stopped playing at 5:35 p.m. how many degrees did the minute hand turn during vince's
practice time explain how you found your answer.

Answers

The minute hand turned 120 defrees.

For every 5 minutes, minute hand will turn 30 degrees as it takes 12 times 5 minutes to complete one round (one hr), which is 360 degrees. For Every 15 minutes, it turns 90 defrees.

So from 5.15 to 5.35pm, the minute had turned 20 minutes, that is 4 times of 5 minutes.

4 times of 5 minutes is equal to 4 times of 30 degrees, since it turns 30 degress for every 5 minutes.

So it has turned 120 degrees to move from 5.15 pm to 5.35 pm
Since you must turn 360 degrees to get around a full hour (60 minutes) we know that 10 minutes = 60 degrees of change because 360 / 6 = 60. Vince played piano for 20 minutes (5:15 - 5:35), and 2 x 10 = 20, so to ensure the equation 10 (minutes) = 60 (degrees) stays equivalent, we'll multiply 60 by 2 too. 60 x 2 = 120, so the minute hand turned 120 degrees during Vince's practice time.

please help me



The perimeter of a rectangle is 141 feet, and the length is twice the width. What are the dimensions of the rectangle?

What's the width of the rectangle and what's the length?

Answers

Final answer:

To find the width and length of the rectangle, we used the perimeter formula and the given relationship between length and width. The width of the rectangle is 23.5 feet and the length is 47 feet, which are found by dividing the perimeter by the sum of the multipliers of width and then multiplying the width by 2 to find the length.

Explanation:

The student asked for help with finding the dimensions of a rectangle given its perimeter and a relationship between its length and width. To find the dimensions of the rectangle, we can use algebra.

Firstly, we know the formula for the perimeter (P) of a rectangle is P = 2l + 2w, where l is the length and w is the width. Since we are given that the perimeter is 141 feet and the length is twice the width (l = 2w), we can set up the following equation:

141 = 2(2w) + 2w

Simplifying the equation, we get:

141 = 4w + 2w
141 = 6w
w = 141 / 6
w = 23.5 feet

Since the length is twice the width, the length (l) is:

l = 2 × 23.5 feet
l = 47 feet

Therefore, the dimensions of the rectangle are a width of 23.5 feet and a length of 47 feet.

2. Jamie is the starting pitcher for his baseball team. The coach recorded the number of pitches he threw in one game. Each pitch is either a ball, strike or hit. The coach recorded that 54 pitches, or 60%, were strikes. What is the total number of pitches that Jaime threw in this game?

Answers

90, because 60% of 90 is 54

Answer:

90

Step-by-step explanation:

:)

Alicia is making a triangular sign for the school play. The area of the sign is 558 in. The base of the triangle is 36in. What is the height of the triangle?

Answers

To find the height of the triangle you will use the formula to find the area of the triangle and the information provided about the area and the base length.

A= 1/2 bh
558 = 1/2 x 36 x h
558 = 18 x h

To solve for the height divide both sides by 18.

This leaves you with 31 = h.

So, the height is 31 inches.

Answer:31 in

Step-by-step explanation:558 ×1/2 ×36 × h = 31 in

Can someone help please........ thanks

Answers

3mph hope his help you

classify the scatter plot as having a negative or no correlation. HOMEWORK DUE TOMORROW

Answers

It's negative. If it had no correlation then they would be all over the place, with this you can see a steady decline.

Let f(x)=81+3e−0.7x .

What is the value of f(−3) ?



Round the answer to the nearest hundredth.

Answers

Answer:

[tex]f(-3)=91.25[/tex]

Step-by-step explanation:

Given :f(x)=81+3e−0.7x

To Find: Value of f(−3)

Solution:

[tex]f(x)=81+3e−0.7x[/tex]

Putting x = -3

[tex]f(-3)=81+3e−0.7*(-3)[/tex]

[tex]f(-3)=81+3e+2.1[/tex]

[tex]f(-3)=83.1+3e[/tex]

Since the defined value of e = 2.718

⇒[tex]f(-3)=83.1+3*(2.718)[/tex]

⇒[tex]f(-3)=83.1+8.154[/tex]

⇒[tex]f(-3)=91.25[/tex]

Thus the value of [tex]f(-3)=91.25[/tex]

Answer:

5.85

Step-by-step explanation:

Sam owns a small business. There was a loss of $16 on Thursday and a loss of $9 on Friday. On Saturday there was a loss of $5, and on Sunday there was a profit of $27. Find the total profit or loss for the 4 days.

Answers

there was a loss of $3 for the 4 days
Profit - Total Loss = profit

27 - (16 + 9 + 5) = -3

Sam Lost $3 (or Sam Earned -$3)

Two consecutive odd numbers are such that seven times the smaller, subtracted from nine times the bigger, gives 144. Find the numbers.

Answers

Let
x-------------> first odd number 
x+2----------> second consecutive odd number

we know that
seven times the smaller, subtracted from nine times the bigger, gives 144

then
9*(x+2)-7*x=144-----------> 9x+18-7x=144---------> 2x=126-----> x=63

the numbers are
63 and 65

The smaller odd number is 63, and the next consecutive odd number is 65.

To find the consecutive odd numbers, an algebraic equation is set up and solved, yielding the smaller odd number as 63 and the next consecutive odd number as 65.

To find two consecutive odd numbers meeting the stipulated condition, we will set up an algebraic equation. Let the smaller odd number be represented by n, then the next consecutive odd number is n + 2. The given condition is that seven times the smaller odd number subtracted from nine times the bigger odd number equals 144. This can be expressed as the equation 9(n + 2) - 7n = 144.

Solving the equation:

Expand the equation: 9n + 18 - 7n = 144Combine like terms: 2n + 18 = 144Subtract 18 from both sides: 2n = 126Divide both sides by 2: n = 63

Therefore, the smaller odd number is 63, and the next consecutive odd number is 65.

Consider a 15-year mortgage at an interest rate of 8% compounded monthly. The amount to be mortgaged is $130,000. After the first month's payment, what is the new outstanding principal?

Answers

The answer is $129,624.32
Final answer:

To find the new outstanding principal after the first month's payment on a 15-year mortgage at an 8% interest rate compounded monthly, we calculate the monthly interest and subtract it from the original principal.

Explanation:

To find the new outstanding principal after the first month's payment, we need to calculate the monthly interest and subtract it from the original principal. Here are the steps:

Convert the annual interest rate to a monthly rate by dividing it by 12: 8% / 12 = 0.67%.Convert the mortgage amount to a decimal: $130,000Calculate the interest for one month: $130,000 × 0.67% = $871.67Subtract the interest from the original principal: $130,000 - $871.67 = $129,128.33

Therefore, the new outstanding principal after the first month's payment is $129,128.33.

Learn more about Mortgage payment here:

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Help please I’m stuck on this problem

Answers

120 km / 2km = 60

60*0.5 = 30 cm
The answer is 1cm because 0.5 x 2 is 1

Hope this helps :)

Eleven is 20% of _______?

Answers

55
You Times 20% by 5 to get fully 100%
So if 11 is 20%
You have to Times 11 by 5 to get fully 100%
11 x 5 is 55.
The answer is 55

Answer: the answer is 55, eleven is 20% of 55

Malik drinks 1/2 liter of water and 1/3 liter of juice. Did Malik drink more water or juice?

Answers

He drank more water, because 1/3 is less than 1/2. Hope this helps!!!
Malik drank more water because 1/2 is greater than 1/3

Use a strategy to solve this problem. (Note: I seriously need help and this is due on Sunday!!)

Ian is given some red licorice that is wrapped in a coil. Upon flattening the licorice, Ian discovers that the total length is 60 cm. He then cuts the licorice into two pieces so that the ratio of the lengths of the two pieces is 7:3. Each piece is then bent to form a square. What is the total area of the two squares?

Answers

You may feel somewhat overwhelmed right now, because this question is giving the reader lots of information and tasks in a short paragraph. Let's break it down into pieces.

1. First, let's find the ratio of the lengths.

Since the ratio is 7 to 3, we can find the length of each licorice piece by setting its proportion over 10, since that is the sum of the ratio. Thus, one licorice piece has a length of 60 * 7/10 = 42 cm and the other has a length of 60 * 3/10 = 18 cm.

2. Now, let's create our squares.

Each piece is bent to form a square. In other words, the pieces is split into 4 equal sides. Thus, we can divide our lengths by 4. The first piece of licorice made into a square has side lengths of 42/4 = 10.5 cm. The second piece of licorice has side lengths of 18/4 = 4.5 cm.

3. Finding the area of our squares.

Now, all we need to do is find the sum of the areas of the squares. The first square has an area of [tex]10.5^2 = 110.25[/tex] cm^2 and the second square has an area of [tex]4.5^2 = 20.25[/tex] cm^2. Thus, our answer is 130.5 cm^2.

convert 35/8 to a decimal using long division

Answers

first take 35 and put it in the house. 8 goes into 3, 0 times. 8 goes into 35, 4 times . 35 - 32 = 3 add 0. 8 goes into 30, 3 times. 30 - 24 = 6 add 0. 8 goes into 60, 7 times 60 - 56 = 4 add 0. 8 goes into 40, 5 times 40 - 40 = 0. therefore the answer is 4.375

does the orders pair (2,14) lie on the graph of y=12x?

Answers

If y=12x, the y coordinate should be 12 times the x coordinate. If x = 12, y should = 24. This is not the case in our ordered pair, therefore, the ordered pair does not fit into our equation.

Nate tells his mom that he took a test with 60 questions and scored 85%. How many questions did he answer correctly? Show how you know.

Answers

0.85 x 60 = 51.

He answered 51 questions correctly.

I know because a percent is out of a hundred, and if he got 60, he got a hundred percent.

which of the following sets of numbers will form a right triangle A. 12,13,14 B. 15,16,18 C. 5,6,9 D.5,12,13

Answers

Your answer would be D i’m sure

can someone help me with this

Answers

Volume= (4/3)(3.14)(r)^3

You already know what pi is, so figure out what the radius is.

Radius= diameter divided by 2

When you get your answer, substitute that for “r”, and then raise it to the third power, then multiply that by 3.14

Multiple your answer by 4, then divide by 3 and that should be your answer

Don’t forget to round.

I hope this was helpful

A survey finds that 40% of students ride in a car to school. Eri would like to estimate the probability that if 3 students were randomly selected, only 1 rides in a car. To simulate this probability, she lets the numbers 0, 1, 2, and 3 represent a student who rides in a car to school and then 4, 5, 6, 7, 8, and 9 represent a student who does not ride in a car to school. She then has a computer randomly select 3 numbers. She repeats this process for 20 trials. The results of these trials are shown in the table. 468 380 120 220 553 945 935 607 473 490 074 981 692 518 408 954 943 389 594 569 Based on this simulation, what is the estimated probability that only 1 of 3 randomly selected students rides in a car to school? Enter your answer, as a decimal, in the box.

Answers

Your answer is going to be 0.60 
Final answer:

The estimated probability that only 1 of 3 randomly selected students rides in a car to school is 0.4 or 40%.

Explanation:

The estimated probability that only 1 of 3 randomly selected students rides in a car to school can be calculated by dividing the number of trials where only 1 student rides in a car by the total number of trials. In this case, there were 8 trials where only 1 student rides in a car out of a total of 20 trials.

Therefore, the estimated probability is:

8 / 20 = 0.4

So, the estimated probability is 0.4 or 40%.

The table shows the membership of two scout troops.

a. What is the percent of change in membership from 2010 to 2011 for Troop A? Round to the nearest tenth of a percent, if necessary.

b. What is the percent of change in membership from 2010 to 2011 for Troop B? Round to the nearest tenth of a percent, if necessary.

c. Which troop has the better record in terms of the number of new members?

d. Which troop has the better record in terms of the percent of change in membership?

Answers

The correct answers are:

A) 14.3%
B) 14.3%
C) Troop B
D) They are equal.

Explanation:

A) The percent of change is given by:
[tex]\frac{\text{amount of change}}{\text{original amount}}\times 100[/tex]

For Troop A, the amount of change is 16-14=2; the original amount is 14. This gives us:
[tex]\frac{2}{14}\times 100=14.3 \%[/tex]

B) The amount of change for Troop B is 24-21=3; the original amount is 21. This gives us:
[tex]\frac{3}{21}\times 100=14.3\%[/tex]

C) Troop A gained 2 more members, while Troop B gained 3; Troop B gained more new people.

D) Since the percent of change for each troop was equal, they both had an equal record in terms of percentage of new members.

Answer:

a. What is the percent of change in membership from 2010 to 2011 for Troop A?

[tex]\frac{16-14}{14}*100[/tex] = 14.28%

b. What is the percent of change in membership from 2010 to 2011 for Troop B?

[tex]\frac{24-21}{21}*100[/tex] = 14.28%

c. Which troop has the better record in terms of the number of new members?

Troop B.

d. Which troop has the better record in terms of the percent of change in membership?

Both have the same percentage change.

Lines a and b are parallel. What is the measure of angle b? Enter your answer in the box. b = ∘ Two horizontal lines the top line labeled a and the bottom labeled b with an angled line intersecting both making eight angles, top right angle labeled seventy nine degrees and the bottom right angle labeled X degrees

Answers

Answer:

It's 79 I took the test

Stay Alive ~ T∅P I-/

Step-by-step explanation:

Answer:

The measure of [tex]m{\angle}b[/tex] is [tex]79^{\circ}[/tex].

Step-by-step explanation:

Given: Lines a and b are parallel to each other.

To find: The measure of the angle b.

Solution: It is given that  Lines a and b are parallel to each other, thus using the parallel lines properties, we have

[tex]m{\angle}a=79^{\circ}[/tex] (Vertically opposite angles)

Now, [tex]m{\angle}a[/tex] and [tex]m{\angle}b[/tex] forms the corresponding angle pair, thus they are congruent.

Hence, [tex]m{\angle}a[/tex]=[tex]m{\angle}b[/tex]=[tex]79^{\circ}[/tex].

Therefore, the measure of [tex]m{\angle}b[/tex] is [tex]79^{\circ}[/tex].

Please helpppppppppppp

Answers

Part A
The scale is found by dividing the total actual distance by the measured distance.

Actual distance = 24 miles
Measured distance = 4 1/2 inches

Scale = 24 / 4 1/2
Scale = 24 / 4.5

The scale generally written as 1 unit on the map : whatever the distance is in miles or km.

Scale = 1 inch on the map : 5 1/3 miles
1:5 1/3 is normally the way the ratio is written.

Part B
You need a proportion for this
1/4 inch = 1 mile
x = 24 miles

Cross multiply
x = 1/4 * 24
x = 6 inches.

x = 6 inches.There are 24 1/4s in 6 inches.

Of each side of a equilateral triangle has a measure of 14 units what is the measure of the altitude (1 point)

Answers

14*sin(60°) = 7√3 ≈ 12.124 . . . is the altitude

find the area of the trapezoid with a base of 19 inches, height 12.6 inches and base 29.2 inches

Answers

Minor base: b=19 inches
Height: h=12.6 inches
Major base: B=29.2 inches

Area of the trapezoid: A
A=(b+B)h/2
Replacing the values:
A=(19 inches + 29.2 inches) (12.6 inches) / 2
A=(48.2 inches) (12.6 inches) / 2
A= (607.32 inches^2 ) /2
A= 303.66 inches^2

Answer: The area of the trapezoid is 303.66 square inches

Read the following statement: Line segment AB is congruent to line segment QR. Which of the following is an equivalent statement?
AB overbar is similar to QR overbar
AB overbar equals QR overbar
AB overbar is an element of QR overbar
AB overbar is congruent to QR overbar

Answers

AB overbar is congruent to QR overbar

Answer: [tex]\overline{AB}[/tex] is congruent to [tex]\overline{QR}[/tex].

OR

AB overbar is congruent to QR overbar.

Step-by-step explanation:

The given phrase : Line segment AB is congruent to line segment QR.

We know that to represent a line segment MN we write it in the below notation:-

[tex]\overline{MN}[/tex]  (By putting a bar on the name)

Similarly , Line segment AB can be written as [tex]\overline{AB}[/tex] and Line segment QR can be written as [tex]\overline{QR}[/tex]

Therefore , we write the given phrase as :  [tex]\overline{AB}[/tex] is congruent to [tex]\overline{QR}[/tex].

4w^3−8w+12
factor the polynomial

5t^2+20t+50
factor the polynomial



Answers

4w^3−8w+12 = 4 (w^3 - 2w + 3)

5t^2+20t+50 = 5 (t^2 + 4t + 10)

Members at a yoda school pay $11 per class plus a one-time $96 membership fee. Non members pay $14 per class. How many classes would a member have to take to save money compared to taking classes as a non-member?

Answers

The difference in pay per class is 3, so to even out with he 96, you’d have to take 32 classes, the profit begins at the 33rd
Hope this helps
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