Ask question

Ask question

All categories

2 years ago

7

a teacher awarded 50 marks to his least student in a class test. How many marks was awarded to the best student if he was 40% be

tter

1 answer:

LenaWriter [7]2 years ago

4 0

Answer:

90 marks per that student

You might be interested in

Are my answers correct?

Snezhnost [94]

Answer:

20 is x ≥ 25

Step-by-step explanation:

In number 20 you put x is less than or equal to 25 ( x ≤ 25 )

It should be x is greater than or equal to 25 ( x ≥ 25 ) because it says it cannot be less than 25.

All your other answers are correct. Good job.

7 0

2 years ago

Factor: 64v^4 - 225w^10

love history [14]

Answer:

( $8v^2-15w^5)(8v^2+15w^5)$

Step-by-step explanation:

STEP 1:

$8^{2}$ $v^{2*2}$ - $15^{2}$ $w^{2*5}$

STEP 2:

$8^{2}$ * $(v^{2})^{2}$ - $15^{2} * (w^{5})^{2}$

STEP 3:

$(8v^2)^2 - (15w^5)^2$

STEP 4:

( $8v^2-15w^5)(8v^2+15w^5)$

6 0

3 years ago

A van traveling at a speed of 32.0 mi/h needs a minimum of 42.0 ft to stop. If the same van is traveling 67.0 mi/h, determine it

makkiz [27]

Answer:

Δx= 184.12 ft

Step-by-step explanation:

The equation you need to use is velocity as a function of displacement.

$v^2= u^2 +2a(\delta x)$

v = the speed at which the car is travelling,

and

v_o is the original speed (in this case zero).

The change in x (displacement) is how far the car travels. You will be solving for a (acceleration).

$32^2= 0^2+ 2a\times42$

solving we get

a= 12.19

now put this acceleration value into the second case when v= 67mi/h

$67^2= 0^2 + 2\times12.19(change in x)$

⇒Δx= 184.12 ft

5 0

2 years ago

The car always uses the same amount of gasoline each mile, how many gallons of gasoline would be needed to travel 480 miles?

hodyreva [135]

Answer:

but how much does it use each mile?

6 0

2 years ago

Please help see pic above

CaHeK987 [17]

Step-by-step explanation:

this is may help you this is my answer to your answer

5 0

2 years ago