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3 years ago

Can somebody help me with this

Mathematics

2 answers:

eimsori [14]3 years ago

3 0

Answer:

If AB and CD are perpendicular, (slope of AB) x (slope of CD) = -1

9/a = -1

a = -9

murzikaleks [220]3 years ago

3 0

Answer:

-9

Step-by-step explanation:

flip and change the sign of $\frac{3}{4}$

$\frac{4}{-3}$

set equal to each other

$\frac{4}{-3}$ = $\frac{12}{a}$

cross multiply

4a = -36

divide by 4

a = -9

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A pipe is leaking at the rate of 32 fluid ounces per minute. Use dimensional analysis to find out how many gallons the pipe is l

lianna [129]

well first think about it, 60 min in an hour, so 32 fluid ounces times 60 = 1920 fluid ounces, from there you can convert fluid ounces to practically anything, for instance, 1920 fluid ounces = 24 cups.

go to this address to find out more.

https://www.google.com/search?q=another+name+for+observations&rls=com.microsoft:en-US:IE-Address&ie=...

4 0

3 years ago

Read 2 more answers

3x + 2y — z + 5w = 20<br> y = 2z – 3w<br> z= w+1<br> 2w =8

satela [25.4K]

Answer:

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5 0

3 years ago

A box contains 12 balls numbered 1 through 12. Two balls are drawn in succession without replacement. If the second ball has the

Nikitich [7]

<h2>Answer with explanation:</h2>

A box contains 12 balls numbered 1 through 12.

Also the ball are drawn without replacement.

The probability that the first ball had a smaller number on it.

i.e. the number on the first ball could be: {1,2,3}

Hence, the probability that the first ball had a smaller number on it is:

$\dfrac{3}{12}=\dfrac{1}{4}=0.25$

The probability that the first ball has a even number on it is:

There are total 6 even numbers {2,4,6,8,10,12}

but 4 can't be considered as it comes on the second draw, so we are left with just 5 balls with even number.

Hence, the probability is:

$\dfrac{5}{12}=0.4166$

8 0

3 years ago

How much should you put in an investment paying simple interest rate of 8% if you need 4000 in six months?

Nadusha1986 [10]

The amount you should put is 3846

<h3>How to determine the principal amount?</h3>

The given parameters are:

Amount, A = 4000

Rate, r = 8%

Time = 0.5 year i.e. 6 months

The amount on simple interest is calculated as:

A = P(1 + RT)

This gives

4000 = P * (1 + 8% * 0.5)

Evaluate the product

4000 = P * (1 + 0.04)

Evaluate the sum

4000 = P * (1.04)

Divide both sides by 1.04

P= 3846

Hence, the amount you should put is 3846

Can somebody help me with this​

Can somebody help me with this