1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
balandron [24]
3 years ago
9

Blake's car has traveled 100 miles in 1 1/4 hours. How many mules per hour in Blake's car traveling?

Mathematics
1 answer:
n200080 [17]3 years ago
5 0

Answer:

Blake's car would be traveling at 80 mph

Step-by-step explanation:

100/1.25=80

You might be interested in
The vertices of a parallelogram are A(x1, y1), B(x2, y2), C(x3, y3), and D(x4, y4). Which of the following must be true if paral
Iteru [2.4K]

The answer is really none of the above, because all of these have divisions by difference in x, and there are perfectly fine rectangles where those will mean dividing by zero.

To do the problem the way they want us to, we note segments with the same slope are parallel (or collinear); segments with slopes which multiply to -1 are perpendicular.

Let's figure out what each choice is trying to tell us by translating it into parallel and perpendicular. Remember A is point 1, ...

A. ((y_4-y_3)/(x_4-x_3)= (y_3-y_2)/(x_3-x_2)) and ((y_4-y_3)/(x_4-x_3)×(y_3-y_2)/(x_3-x_2))=-1

translated, that's CD║BC and CD⊥BC - contradictory; second half right

B. (y_4-y_3)/(x_4-x_3)= (y_2-y_1)/(x_2-x_1) and ((y_4-y_3)/(x_4-x_3)×(y_2-y_1)/(x_2-x_1))=-1

CD ║ AB and CD ⊥ AB - only the parallelogram half is right

C. (y_4-y_3)/(x_4-x_3)= (y_2-y_1)/(x_2-x_1) and (y_4-y_3)/(x_4-x_3)×(y_3-y_2)/(x_3-x_2)=-1

CD║AB and CD⊥BC - that's TRUE

D. (y_4-y_3)/(x_4-x_3)= (y_3-y_1)/(x_3-x_1) and (y_4-y_3)/(x_4-x_3)×(y_2-y_1)/(x_2-x_1)=-1

CD║AC and CD⊥AB - nope

Answer: C

The way I'd get the proper expression is with the dot product.

A parallelogram is a rectangle when adjacent sides are perpendicular. It only takes one right angle to make them all right.

Two sides are perpendicular when the dot product of their direction vectors is zero. All the answers have y_4 - y_3 so one side is CD. The other side must be BC or AD; AD would give y_4 - y_1 terms which don't appear among the answer, so let's go with BC.

The direction vectors are

D-C = (x_4 - x_3, y_4 - y_3)

C-B = (x_3 - x_2, y_3 - y_2)

For perpendicularity we need a zero dot product:

0 = (D-C)\cdot(C-B) = (x_4 - x_3)(x_3 - x_2) + (y_4 - y_3)(y_3 - y_2)

- (x_4 - x_3)(x_3 - x_2) = (y_4 - y_3)(y_3 - y_2)

That's the correct expression, given it's a parallelogram, to demonstrate it's a rectangle. The divisions make it iffy.

8 0
3 years ago
After arranging the terms in descending powers of a variable, select the opposite of the polynomial.
kondaur [170]

Answer: -4n3+12n2+7n-9

Step-by-step explanation: it basically the opposite sign (positive or negative) switched, and the order backwards. hope that helped

6 0
3 years ago
Find the perimeter. Simplify the answer.
Ugo [173]

Answer: 26t - 8

Step-by-step explanation:

7 0
3 years ago
Rachel walks to a friends house then to the store then back home. the distance from Rachel’s house to her friends house is 1 5/6
ryzh [129]

Answer:

11/12 miles hope this helps :)

7 0
3 years ago
Suryana bought 16 watches for rs 16000. At what rate should he sell the watches to gain rs 3200?​
dangina [55]

Answer:

Step-by-step explanation:

So if 16 watches is 16000 rs, then if you want to make 3200 more rs, your total from 16 watches should be 19200 (which is 16000+3200)

so the rate per watch should be 19200/16 = 1200

So it should be 1200rs/watch is the rate

8 0
3 years ago
Read 2 more answers
Other questions:
  • The length of the base of a rectangle prism is 3 feet and its width is 2 feet. The length of the diagonal of the prism is 6 feet
    7·1 answer
  • If the interest rate is 10%, what is the present value of a security that pays you $1,100 next year, $1,210 the year after, and
    7·1 answer
  • How do you write 26,300 in scientific notation? ____× 10^____
    11·2 answers
  • A pair of sneakers is priced at $150 and is on sale. Yolanda pays $105 for a pair of the sneakers. What percent is the markdown
    9·1 answer
  • Jose works as a salesperson at an electronics store and sells phones and phone accessories. Jose earns a $9 commission for every
    12·2 answers
  • A seamstress is making a decorative pillow and wants to see lace around the trim. The pillow is in the shape of a triangle with
    6·1 answer
  • Sandy has 8 markers. Alex has 6 fewer markers than sandy. Jill has 2 markers. How many markers do they have in all? Show your wo
    8·2 answers
  • Here are some free points!! :)
    10·2 answers
  • Find the x and y intercepts of y = 2x^3 - 4x^2 algebraically
    14·1 answer
  • Two equivalent expressions for 24x - 3y
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!