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Luba_88 [7]
2 years ago
15

Which expression is prime? A) x2 - 9 B) 1 - 9x2 C) 2a2 - 25 D) 4x2 - 9

Mathematics
2 answers:
mel-nik [20]2 years ago
4 0
I think the right anser would be (a)

Luden [163]2 years ago
3 0

Answer:

its c 2a2-25


Step-by-step explanation:


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A vehicle purchased for $
Nataly [62]

Answer:

$10,870

Step-by-step explanation:

we can multiply the initial value (27500) by (1-.06), or 0.94, raised to the 15th power

27500(.94)^15 = 10,870.52

6 0
2 years ago
What are the solution(s) to the quadratic equation 9x^2=4?
Irina18 [472]

Answer:

x = 2/3 or x = -2/3

Step-by-step explanation:

Solve for x over the real numbers:

9 x^2 = 4

Hint: | Divide both sides by a constant to simplify the equation.

Divide both sides by 9:

x^2 = 4/9

Hint: | Eliminate the exponent on the left-hand side.

Take the square root of both sides:

Answer:x = 2/3 or x = -2/3

8 0
3 years ago
If Alice give an interest of 90$ for two years and 9% p.a., find the sum she has borrowed .
hodyreva [135]

Refer the attachment for your answer :)

4 0
2 years ago
CW: If the 5th term and the 10th term of an arithmetic
Scrat [10]

Answer:

<h2>          a₂₁ = 188</h2>

Step-by-step explanation:

The n-th term of an arithmetic sequence:  a_n=a_1+d(n-1)

so:

    a_5=a_1+d(5-1)\\a_5=a_1+4d\\a_1=a_5-4d\\a_1=44-4d\\\\a_{10}=a_1+d(10-1)\\ a_{10}=a_1+9d\\89=44-4d+9d\\45=5d\\d=9\\\\a_1=44-4\cdot9 = 8\\\\a_{21}=a_1+ 20d=8+20\cdot9=188

6 0
3 years ago
The federal debt was 17.3 trillion in 2014 and 13,561,623 (in millions) in 2010. How much more was the federal debt in 2014 comp
BabaBlast [244]
We have that
In 2014 --->  t<span>he federal debt was 17.3 trillion
n 2010----> </span>the federal debt was <span>13,561,623 millions

we know that
one trillion----------> 1,000,000,000,000-----> 1 x 10</span><span>^12
so
17.3 trillion-------> 17.3 x 10</span>^12-----> 1.73 x 10<span>^13
[</span>1.73 x 10^13-13,561,623]=17,300,000,000,000-13,561,623]
=17,299,986,438,377

the answer is
17,299,986,438,377

6 0
3 years ago
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