All categories

3 years ago

Please help ASAP!!! Thanks! :) (−3)(a+x), if a=8, x=−10

Mathematics

2 answers:

jekas [21]3 years ago

8 0

-3(8-10) subtracting is the same as adding the opposite

-3(-2) multi. Negative times a negative becomes a positive

Sergeu [11.5K]3 years ago

7 0

Answer:

Step-by-step explanation:

First we should solve the problems inside the bracket (a+x). Since a=8 and x=-10, (a+x) = (8+(-10)). (8+(-10))= (8-10). Then it is only a matter of subtraction and multiplication. (8-10)=(-2). Now we have clear numbers instead of variables, so (-3)(-2)=+6 (since two brackets with no sign in between will multiply the contents inside each other together.). I hope this was helpful!

TL;DR: (-3)(a+x)=(-3)(8+(-10))=(-3)(8-10)=(-3)(-2)=+6.

You might be interested in

Can someone please help me with math.

iragen [17]

Answer:

Answer C 2,799.159

Step-by-step explanation:

$v=\pi r^{2} h$

5 0

3 years ago

A supervisor finds the mean number of miles that the employees in a department live from work. Which mileage is within a z-score

Vikentia [17]

The z-score tells you how many standard deviations from the mean.

1.5 * 3.6 = 5.4 miles 

So anything within 5.4 miles of the average (29). 

The range would be: 
29 - 5.4 = 23.6 
to: 
29 + 5.4 = 34.4 

23.6 ≤ x ≤ 34.4 

Answer: 
B) 24 miles

7 0

3 years ago

Read 2 more answers

A student answers a multiple-choice examination question that offers four possible answers. Suppose the probability that the stu

Nitella [24]

Answer: 0.9730

Step-by-step explanation:

Let A be the event of the answer being correct and B be the event of the knew the answer.

Given: $P(A)=0.9$

$P(A^c)=0.1$

$P(B|A^{C})=0.25$

If it is given that the answer is correct , then the probability that he guess the answer $P(B|A)= 1$

By Bayes theorem , we have

$P(A|B)=\dfrac{P(B|A)P(A)}{P(B|A)P(A)+P(C|A^c)P(A^c)}$

$=\dfrac{(1)(0.9)}{(1))(0.9)+(0.25)(0.1)}\\\\=0.972972972973\approx0.9730$

Hence, the student correctly answers a question, the probability that the student really knew the correct answer is 0.9730.

7 0

3 years ago

Without subtracting 8.5 - 4.64, determine what digit will be in the hundredths place. Explain

murzikaleks [220]

8.5 is the same as 8.50, right? So just take the digit in the hundredth place of both decimals and subtract. You'd be doing 0-4 so you can go ahead and borrow a number to make 10-4, which equals 6. So without subtracting 8.5 and 4.64, you can determine that 6 will be in the hundredth place. Hope this helps!

3 0

3 years ago

Select the correct answer.

MrRissso [65]

Answer:

C. 309 cm2

Step-by-step explanation:

A=2(1+sqr2)a^2

A=2(1+sqr2)8^2

≈309.01934

3 0

2 years ago