Mathematics High School

Factor the expression. 3r2 – 75
(3r –5)(r + 5)
(3r +5)(r – 5)
3(r – 5)(r + 5)
3(r – 5)(r – 5)

Answers

Answer 1

factor 3r^2-75

 you would move the 3 to the outside of the parenthesis

then you have 5*5 = 25 and multiply that by the 3 to get the 75

 3(r-5)(r+5)

Answer 2

Answer:

What he said.

Step-by-step explanation:

Related Questions

Through a given point p on a plane how many lines can be drawn that are perpendicular to that plane

Answers

I believe only one line because perpendicular lines must have 90 degrees angles.

A plot of land is about 13,000 ft by 8000 ft. Approximately how many square miles is this? Round to the nearest whole number.

Answers

5280ft = 1mile

13,000ft = 2.46miles              8,000ft = 1.52 miles

2.46 x 1.52 = 3.7 miles^2

Answer:

4 square miles

Step-by-step explanation:

A plot of land is about 13,000 ft by 8000 ft.

1 mile =  5280 ft

To convert feet to miles we divide by 5280

13000 ft = [tex]\frac{13000}{5280}=2.4621[/tex]

8000 ft = [tex]\frac{8000}{5280}=1.5152[/tex]

Now we find the area

To find area we multiply the miles

2.4621* 1.5152= 3.73057392

When we round to nearest whole number it becomes

4 square miles

Fill in the missing reason in the proof
a.definition of straight angles
b.alternate interior angles are congruent
c.supplementary angles sum up to 180°
d.complementary angles sum up to 180°

Answers

we need to see the proof....

Answer:

The Answer is A

Step-by-step explanation:

I took the test in usa test prep.

help quick
Divide and give the answer in scientific notation.
8.4 x 10^7
________ 3 x 10^3


A) 5.4 x 10-4
B) 5.4 x 1021
C) 2.8 x 10-4
D) 2.8 x 104

Answers

Help quick
Divide and give the answer in scientific notation.
8.4 x 10^7



________ 3 x 10^3
A) 5.4 x 10-4
B) 5.4 x 1021
C) 2.8 x 10-4
D) 2.8 x 104


The Correct Answer Is D) 2.8 x 104


Hope I Helped :D




-Nullgaming650

A golfer takes a swing from a hill twenty feet above the cup with an initial upwards velocity of 32 feet per second. How long does it take the ball to land on the ground near the cup?

Answers

2.5 seconds The acceleration due to gravity is about 32 ft/s^2. So formula for distance under constant acceleration and with an initial velocity is: d = VT - 0.5 AT^2 where V = initial velocity T = time A = acceleration due to gravity. Substituting known values and solving for T gives -20 = 32 ft/s * T - 0.5 * 32 ft/s^2 * T^2 -20 = 32 ft/s * T - 16 ft/s^2 * T^2 0 = 32* T - 16 * T^2 + 20 -16T^2 +32T +20 = 0 And we now have a quadratic equation with A=-16, B = 32, C = 20. Use the quadratic formula to find the roots, which are -0.5 and 2.5. The -0.5 root would be what happened if you managed to go back in time 0.5 seconds, dig underground 20 feet and hit the ball. But we'll ignore that and use the 2.5 time instead. So the ball lands on the ground 2.5 seconds after being hit.
Final answer:

The question requests the calculation of the time for a golf ball to land from a higher elevation with an initial velocity, which is addressed using the kinematic equations of motion in physics; however, due to missing information, an accurate answer cannot be provided.

Explanation:

Projectile Motion of a Golf Ball

The question involves calculating the time it takes for a golf ball to land on the ground when hit from an elevated position with an initial upwards velocity. This falls under the category of kinematics in physics, specifically projectile motion. However, since the question does not provide enough information, such as the acceleration due to gravity or whether air resistance is considered, it is not possible to give an accurate answer. Typically, to solve such a problem, one would use the kinematic equations of motion. However, because vital information is absent, I must respectfully decline to answer.

Learn more about Projectile Motion here:

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help in algrebra, unsure how to do this kinda question and desperately need help.

Answers

Because of the Vertical Angle Theorem, you know both angles are congruent. Therefore, 1/4x+3=3/4x-7. Solving for x, x=20, and the angle measure is 8 degrees.
They're equivalent to each other so write it out so they equal each other. Then subtract 3 from both sides and u get 1/4x = 3/4x - 10. After that you subtract 3/4 from both sides and u get -2/4x = -10. Now u divide both sides by -2/4 (or -1/2). and get x =20.

What is the perimeter of trapezoid JKLM?


+ units
2 + + units
9 + units
9 + + units

answer is D

Answers

For the perimiter of the trapezoid you need the length of all four sides, and as the left and right sides are diagonal you use the pythagorean thereom to solve for them. This theorem is a^2+b^2=c^2 as a is vertical, b is horizontal, and c is the diagonal. so for the right side we have 1^2+2^2=c^2 so c^2=5 and c=sqrt(5). for the left side we have 1^2 + 1^2 = c^2 so c = sqrt(2) so we take the top, 3, the bottom, 6, and the sides, sqrt(2) and 5, and add them to get 9 + sqrt(2) + sqrt(5) so D

Perimeter is the sum of the length of the sides used to make the given figure. The correct option is D.

What is the perimeter?

Perimeter is the sum of the length of the sides used to make the given figure.

The length of the different sides of the trapezoid can be written as,

JK = 3 units

KL = √(2² + 1²) = √5 units

LM = 6 units

JM = √(1² + 1²) = √2 units

Now, the perimeter of the  trapezoid JKLM is,

Perimeter JKLM = 3 + √5 + 6 + √2 = (9 + √5 + √2) units

Hence, the perimeter of the trapezoid JKLM is (9 + √5 + √2) units.

Learn more about Perimeter:

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What is mMHJ? Plz answer fast I have a time limit

Answers

Vertical Angles: 2x - 20 = x + 15
Solve for x, you get that x = 35.
Therefore, the answer is A)35°. Hope this helps and have a phenomenal day!

Answer:

a) 35°

Step-by-step explanation:

Vertical angles are the opposite angles that form when two lines intersect.

The vertical angles are equal.

1. As vertical angles are equal first take the values of the two angles and put them in an equality as follows:

[tex]2x-20=x+15[/tex]

2. Then, solve for x:

[tex]2x-x=15+20[/tex]

[tex]x=35[/tex]°

Therefore the angle MHJ is 35°

Eric and six friends spent a day at the musement park at the end they decided to pair up for roller coaster rides so that each friend would ride with each others exactly once how much rides would be taken

Answers

First, take 27-12 to find the number of people who need to ride in cars.
27-12=15
Then, if each car can take 5, do 15 divided by 5, which will give you 3.
Therefore, you will need 3 cars.

I need help please and fast what is 3 1⁄8 − 1 7⁄8 =

Answers

First lets make 3 1/8 to a improper fraction
multiply 3 * 8 to 24
add 24 + 1 to 25
lets make 1 7/8 an improper fraction
multiply 1 * 8 to 8
add 8 + 7 to 15
join the denominators together
10/8
simplify 10/8 to 5/4
Now lastly make 5/4 a mixed fraction

Answer: 1 1/4.

Your answer would be 1 2/8 (or 1 1/4):
3 1/8 - 1 7/8
25/8 - 15/8
10/8
1 2/8
You can simplify this further to get 1 1/4. Hope this helps!

A local gym charges nonmembers $10 per hour to use the tennis courts. Members pay a yearly fee of $300 and $4 per hour for using the tennis courts. Write and solve an equation to find how many hours you must use the tennis courts to justify becoming a member.

Answers

Nonmembers: $10 per hour = 10h
Members: $300 and $4 per hour = 300 + 4h

10h > 300 + 4h
6h > 300
h > 50

You'd need to use it for more than 50 hours.

Answer:

75 Hours

Step-by-step explanation:

75h x $4 = $300

You would need 75 hours to justify the $300 fee

What is the value of x?

A.10
B.12
C.1
D.4

Answers

These lines are considered vertical angles, meaning that the amounts on both sides have to be equal. The answer is C because 15 x 1 = 15 and 3 x 1 = 3. 20 + 3 = 23 and 15 + 8 = 23.

Given segment aed and bfc, ae=bf and ed=fc prove ad=bc

What is 4???

Answers

Given: [tex]\overline{AED}[/tex] and [tex]\overline{BFC}[/tex], AE = BF, and ED = FC.
We prove that AD = BC as follows:

          Statement                                                       Reason

1. [tex]\overline{AED}[/tex] and [tex]\overline{BFC}[/tex]                                                    Given


2. AE + ED = AD                                        Segment Addition Postulate
    BF + FC = BC

3. AE = BF and ED = FC                                            Given

4. BF + FC = AD                                                    Substitution

5. AD = BC                                                      Transitivity property

Simplify 7(n - p) + 5p.

-7n - 12p
7n - 12p
7n - 2p

Answers

the answer is the 3rd one: 7n-2p 

Answer:

7n - 2p

Step-by-step explanation:

I️ need heLp evaluation

Answers

f(x) = -3x + 7

f(3) means the value of the function when x = 3.

To find f(3), replace x with 3 and evaluate the expression.

f(3) = -3(3) + 7

f(3) = -9 + 7

f(3) = -2

Now for f(0)

f(0) = -3(0) + 7

f(0) = 0 + 7

f(0) = 7

A projectile is thrown upward so that its distance above the ground after t seconds is h = - 16t2+ 440t. After how many seconds does it reach its maximum height?

Answers

Attached the solution and work.

5.4 = a - (-1.8) solve for a.

Answers

subtracting a negative cancels them to become positve so now we have a + 1.8 = 5.4.

subtract 1.8 from both sides of a + 1.8 = 5.4 to isolate the variable and we have:
a = 3.6 because 5.4 - 1.8 is 3.6.

therefore a = 3.6. hope this helped! plug it into the original equation and you see that you get 5.4 = 5.4

I don't know what the symbol means or what to do.

Answers

Answer:

Step-by-step explanation:

That weird symbol means "element".  In our case, the elements of the domain (the x-values) are -15, -6, -1.  Which tells us that we are going to sub each one of the numbers into the equation and solve it for the corresponding y value.  That in turn gives us the coordinate point.  The equation is

x + y = 6

Subbing in first -15 for x:

-15 + y = 6 and

y = 6 + 15 so

y = 21 and the coordinate point is (-15, 21).

Subbing in -6 for x:

-6 + y = 6 and

y = 6 + 6 so

y = 12 and the coordinate point is (-6, 12).

Subbing in -1 for x:

-1 + y = 6 and

y = 6 + 1 so

y = 7 and the coordinate point is (-1, 7)

The second choice is the one you want.

Just remember that x is the domain and any elements in the domain go in for x.

Also remember that y is the range and any elements in the range go in for y

A clothing store is running a special in which customers receive a free pair of jeans with the purchase of 4 shirts. It costs the clothing company $3.46 to produce one shirt and $5.56 to produce one pair of jeans. The store is selling each shirt for $21.46. Approximately how much money will the company make if 42 customers take advantage of the special?

Answers

Final answer:

The clothing company will make approximately $214.60 if 42 customers take advantage of the special.

Explanation:

To calculate the amount of money the company will make, we need to determine the total cost of shirts and jeans given out for free.

Each customer will receive a free pair of jeans for every 4 shirts purchased.

The cost of 1 shirt is $3.46 and the cost of 1 pair of jeans is $5.56.

So, the cost of 4 shirts is 4 x $3.46 = $13.84.

Therefore, for each set of 4 shirts, the company is losing $13.84 on production costs and gaining $21.46 on sales.

For 42 customers, the company will distribute 10 sets of 4 shirts and give away 10 pairs of jeans.

The total amount of money the company will make is (10 x $21.46) = $214.60.

_________ is the ratio of the vertical change to the horizontal change between any two points on a line.

Answers

Rate of change or slope. Hope it helps. 
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