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saul85 [17]
3 years ago
8

a submarine travels 90 kilometers in 4 hours find the submarines rate of speed in kilometers per hour

Mathematics
1 answer:
defon3 years ago
6 0

Answer:

22.5

Step-by-step explanation:

To find the rate of speed per hour, you need to divide the kilometer (90) by the hours (4).

90/4=

22.5

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krek1111 [17]

Answer:

I am not so sure but I think it is x>3

Step-by-step explanation:

8 0
3 years ago
Fifteen less than twice a number is 53.solve 2n-15=53
vaieri [72.5K]
First add 15 to both sides:

2n = 68

Then divide each side by two.

n = 34
5 0
4 years ago
Read 2 more answers
Hi! im not sure if my answer is correct or not can someone check me :)
Maslowich
It is correct goodluck
7 0
3 years ago
Find the values of C for which C(x+2)—(x+2)(x–2)=0 has just one solution. please help me ASAP ​
CaHeK987 [17]
<h3>Answer:   C = -4</h3>

==================================================

Work Shown:

C(x+2) - (x+2)(x-2) = 0

(x+2)(C-(x-2)) = 0

(x+2)(C-x+2) = 0

x+2 = 0 or C-x+2 = 0

x = -2 or x = C+2

If we want one solution only, then we must make C+2 = -2 which solves to C = -4

If C = -4, then x = C+2 = -4+2 = -2 which matches with the first solution mentioned. If C is anything else but -4, then we'd have two different solutions (eg: C = 10 leads to x = C+2 = 12 as the other solution)

3 0
2 years ago
Tom gets a bonus of 30% of £96. Sally gets a bonus of £31.40. Work out the difference between the bonus Tom gets and the bonus S
GarryVolchara [31]

Answer:

Tom's Bonus=£28.80

The difference in bonus rates is £2.60

Step-by-step explanation:

-Given Tom's bonus is 30% of £96

#We determine Tom's bonus in £s:

B_T=0.3\times 96\\\\=\£28.80

#From our calculations,Sally has a larger bonus than Tom:

B_S>B_T\\\\B_S-B_T=31.40-28.80=\£2.60

Hence, Tom gets a bonus of £28.80 and the difference in the bonus rates is £2.60

6 0
4 years ago
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