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taurus [48]
3 years ago
15

My friend sets out walking at a speed of 3 miles per hour. I set out behind her 5 minutes later at 4 miles per hour.

Mathematics
1 answer:
Masja [62]3 years ago
5 0
It will take 45 minutes.
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Subtract.
mixas84 [53]

9514 1404 393

Answer:

  17 -4i

Step-by-step explanation:

You do this the same way you would if i were a variable.

  8-(-4+5i)-(-5-i) = 8 +4 -5i +5 +i = (8 +4 +5) +(-5i +i) = 17 -4i

7 0
3 years ago
Find the volume of a cuboid of sides 9 cm, 10 cm and 11 cm.
amm1812

Answer:

990 cm3

Step-by-step explanation:

lengh x width/ breadth x height

9x10x11 =

990cm3

5 0
2 years ago
Please answer correctly !!!!! Will mark Brianliest !!!!!!!!!!!!!!
irina1246 [14]

the answer is x3

11x3=33

5x3=15

multiply by 3 on all of them    

mark brainliest plz

3 0
2 years ago
I need help please!!!
Alenkinab [10]

Answer:D

Step-by-step explanation:

5 0
2 years ago
If (9x − 4)(9x + 4) = ax² − b, what is the value of a? (5 points)
lions [1.4K]

Given, (9x - 4)(9x + 4) = ax² - b

From algebraic identities:

We know, (a + b)(a - b) = a² - b²

Now, 81x² + 36x - 36x - 16 = ax² - b

81x² - 16 = axis² - b

So ax² = 81x²

a = 81

-b = -16

b = 16

Solution

Therefore, the value of a is 81.

<h2>MyHeritage</h2>
8 0
2 years ago
Read 2 more answers
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