1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
mash [69]
3 years ago
8

A²-b²evaluation if a=4 and b=-2​

Mathematics
2 answers:
yawa3891 [41]3 years ago
6 0

Answer:

12

Step-by-step explanation:

(4)^2-(-2)^2

16-4=12

Marta_Voda [28]3 years ago
4 0
The Answer is 20

Explanation
If a is 4 then 4 to the power of 2 would be 16. If b is -2 and it is applied to the power of 2. Then it would be -4. But since there is another minus sign behind the B, you would make the sign a addition sign. So it would basically be 16 plus 4, which is 20
You might be interested in
Some students were asked what kinds of animals they have at home.
Nataly_w [17]

(a) Animals by popularity; Dogs, Cats, Others, Horses.

(b) If 250 students were interviewed, 20 students have other pets.

(c) No, it was incorrect.

Step-by-step explanation:

Step 1; We arrange the different pets in chronological order, from the highest percent to the lowest percent;

1. Dogs - 67%,

2. Cats - 20%

3. Others - 8%,

4. Horses - 1%.

None is not included in this list.

Step 2; If 250 students were interviewed, 8% of those have other pets. So we need to calculate how much 8% of 250 is.

8% of 250 = \frac{8}{100} × 250 = 0.08 × 250 = 20.

So 20 students had other pets.

Step 3; 20% of the interviewed students had cats. If 75 students had cats, we need to equate 20% to the 75 and find out how many students were actually interviewed.

20% × x = 75, 0.2 × x = 75,

x = \frac{75}{0.2} = 375.

So if 375 students were interviewed, 75 students would have cats. So the estimate of 250 students being interviewed is incorrect.

8 0
3 years ago
Is the sequence geometric? If so, identify the common ratio. 6, 12, 24, 48, ...
Artist 52 [7]
Yes. It is a Geometric sequence!
Common ratio = a2/a1 = 12/6 = 2

In short, Your Answer would be Option A

Hope this helps!
5 0
3 years ago
Help with Pre Calculus
marshall27 [118]

Answer:

The first option

Step-by-step explanation:

The domain of a rational function should be all real numbers except for when the denominator is equal to 0. To find when the denominator is equal to 0 you simply need to find the zeroes of the denominator... but in this case you can do that through factoring and using the quadratic equation.

So first step is going to be to factor out the GCF, which in this case is x. This gives you the equation. x(2x^2-x-15). So one of the zeroes is when x=0. Now to find the other two zeroes you can use the quadratic equation which is x=\frac{-b\pm\sqrt{b^2-4ac}}{2a}\\\\. So to find the other zeroes you simply plug the values in. a=2, b=-1, c=-15

x=\frac{-(-1)\pm\sqrt{(-1)^2-4(2)(-15)}}{2(2)}\\\\x=\frac{1\pm\sqrt{1-4(2)(-15)}}{4}\\\\x=\frac{1\pm\sqrt{121)}}{4}\\\\x=\frac{1\pm11}{4}\\\\x=\frac{12}{4}\\x=3\\\\x=\frac{-10}{4}\\x=-\frac{5}{2}

4 0
2 years ago
Solve for x in the equation x2+14 x+17=-98​
Softa [21]

Answer:

x=−7+√130 or x=−7−√130

Step-by-step explanation:

4 0
3 years ago
Read 2 more answers
Olympia ate lunch at a restaurant. The amount of her check was $6.89. She left $8.00 on the table, which included the amount she
Stolb23 [73]
<span>6.89 + t = 8.00</span><span>
t = 8 - 6.89
t = 1.11

tips = $1.11

</span>answer

a.6.89 + t = 8.00
8 0
3 years ago
Read 2 more answers
Other questions:
  • An element with mass 780 grams decays by 16.3% per minute. How much of the element is remaining after 16 minutes, to the nearest
    14·1 answer
  • What is the solution to this question
    14·2 answers
  • Suppose the slope of a line is positive. Describe what happens to the graph of the line as you move from left to right?
    14·1 answer
  • Which of the following statements are true of the discriminant? The discriminant is b2 – 4ac in the quadratic formula. The discr
    8·2 answers
  • 1. Ellie has at most $25 to spend on miscellaneous items each week. She has already spent
    5·1 answer
  • Which transformations map the strip pattern onto itself
    11·2 answers
  • 5tenths=Blank hundreths​
    6·1 answer
  • 20 POINTS PLEASE HELP ME!!!
    14·1 answer
  • Write a word problem for this equation $2 x n = $18
    8·1 answer
  • A father wants to buy a total of five milk drinks for his son and spend $7.95. Eggnog costs $1.55 and a peanut punch costs $1.65
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!