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RSB [31]
3 years ago
15

PLZ HELP IM BEING TIMED

Mathematics
2 answers:
Ludmilka [50]3 years ago
8 0

Answer:

A

Step-by-step explanation:

djverab [1.8K]3 years ago
3 0
Ian doing domain right NOW lol I guess bc I don’t know
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Lisa started to drive from Boston to Washington, DC, which is 440 miles away, at 8:00 AM. For the first four hours of her trip,
sukhopar [10]

Answer:

60 mph

Step-by-step explanation:

Given;

Total distance covered d = 440 miles

Average speed in the first 4 hours v1 = 50 mph

Total time taken for the whole trip t = 8:00 to 4:00pm

t = 16:00-8:00 = 8 hours

Firstly we need to calculate the distance covered during the first 4 hours;

d1 = average speed × time = v1 × t1

t1 = 4

d1 = 50 × 4 = 200 miles

Then we need to calculate the distance covered in the second period of the journey;

d = d1 + d2

d2 = d - d1

Substituting the values;

d2 = 440 - 200

d2 = 240 miles

The time taken for the second period of travel t2;

t2 = t -t1 = 8-4

t2 = 4 hours

Average speed = distance travelled ÷ time taken

The average speed for the second part of the trip v2 is;

v2 = d2 ÷ t2

Substituting t2 and d2;

v2 = 240 miles ÷ 4 hours

v2 = 60 mph

The average speed during the second part of the trip is 60 mph

3 0
3 years ago
Using the matrices below determine if the product of AB is defined. If defined, state the dimension (Picture provided)
il63 [147K]

Answer:

option C. Defined, 3 x 3

Step-by-step explanation:

The order of matrix A is 3 x 2 i.e 3 rows and 2 columns

The order of matrix B is 2 x 3 i.e. 2 rows and 3 columns

Two matrices can be multiplied if and only if the number of columns of 1st matrix is equal to the number of rows of 2nd matrix. Since the number of columns in matrix A is equal to the number of rows in matrix B, the product AB is defined.

The product AB will have number of rows equal to the rows of 1st matrix i.e. matrix A and number of columns equal to the columns of 2nd matrix i.e. matrix B.

So the order of AB will be 3 x 3 .

Therefore, the correct answer is option C. Defined 3 x 3

4 0
3 years ago
Please I need help it’s due tomorrow and I don’t understand I need help on 1-10
aivan3 [116]

for all of them calcuate whats in the prenteces first then use those numbers to  solve the rest of the problem



4 0
3 years ago
Find the value of 5^-3 x 2^-1
xenn [34]

Answer:

Step-by-step explanation:

5^-3 = 1/(5*5*5) = 1/125

2^-1 = 1/2

1/125 * 1/2 = 1/250

That could be the answer

So could 0.004

4 0
2 years ago
If a ball has a rebound ratio of 0, what does that mean?
exis [7]

Answer: The test is conducted with an electromagnetic or vacuum release mechanism which releases a soccer ball from a height of 2 meters. From that the height of the rebound is measured by recording the sound of the first and second bounce. The time between the first and second bounce is measured. Also During a collision, some of the ball's energy is converted into heat. As no energy is added to the ball, the ball bounces back with less kinetic energy and cannot reach quite the same height. ... It reaches way higher than from the height it was released.

<h3>Hope this helps have a awesome day/night❤️✨</h3>

Step-by-step explanation:

8 0
3 years ago
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