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spayn [35]
3 years ago
14

Giving Brainiest to who gets it right please hurry though.

Mathematics
1 answer:
kramer3 years ago
8 0
1. 2.50x + 5 = C
2.50(4.1) + 5 = C
$15.25

2. 15.25(1.15)
$17.54

3 B, I believe but dont quote me.

4. 206 / 60 + 30
236 minutes
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Which equation involves a prime quadratic and cannot be solved by factoring? A. x2 + 5x − 4 = 0 B. x2 − x − 6 = 0 C. x2 + 3x − 4
Damm [24]

Answer:

Option A

Step-by-step explanation:

We can try to factorize all the options one by one.

For A:

x^{2} +5x-4\\=> x^{2}+4x+x-4\\=>x(x+4)+1(x-4)

We can see that the quadratic expression cannot be solved by factorization as the factors at the end of factorization are not equal in both brackets. So Option A is the correct answer for the given question.

Moreover we can also note that all the other quadratic expressions can be factorized ..

8 0
3 years ago
There are four more girls than boys in Ms. Raub's class of 28 students. What is the ratio of number of girls to the number of bo
Alex73 [517]
16:12

Subtract 4 from 28 then divide by 2.
8 0
3 years ago
What kind of expression is: <br><br><br> Answer quickly, correct answer will get brainlist
Sphinxa [80]

Answer:

The answer is A. ( x-3/x-6  x X^3 + 5/x+1 ) is rational because it is a product of rational expressions since rational expressions are closed under multiplication.

Step-by-step explanation:

4 0
2 years ago
The diameter of the moon is about 3500 km. Approximate the surface area of the moon using the formula for the surface area of a
horrorfan [7]

Answer:

3.8465 *10^7 square kilometers

Step-by-step explanation:

The surface area of a sphere can be found using the formula SA=4\pi r^2. Since the diameter is 3500 km then its radius is half of this. 3500 divided in two is 1,750 units. Substitute r=1,750.

SA=4\pi r^2\\SA = 4 \pi (1750)^2\\SA = 4 \pi *3,062,500\\SA =38,465,000

The surface area of the moon is about 38,465,000 square kilometers. Write this is scientific notation using base. 3.8465 *10^7

5 0
3 years ago
Solve by using Substitution, please help! Show work if you can!
ioda
Hey sorry if I cant show work but here is the point form:
( 0 , 1 ) and ( -3 , -2 )
5 0
3 years ago
Read 2 more answers
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