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stepladder [879]
4 years ago
5

HELP PLEASE! idk the answer :(

Mathematics
1 answer:
mezya [45]4 years ago
7 0

Answer:

A because 63/4 is 15.75

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Find the greatest common factor of 15x^2 y^3 and -18x^3 yz
AysviL [449]
It should be 3x^2y
I'm using 3 from numbers because 3 is a GCF of 18 and 15
Then I'm getting X^2 because it's the GCF of X^2 and X^3
Then I'm taking y because it's the GCF of y^3 and y
And finally we got no z on the left side so we get 3x^2y
5 0
3 years ago
Find the value of n such that x2-10x+n is a perfect square trinomial.
mihalych1998 [28]
The answer is the last option (Option D), which is:

 D. 25

 The explanation is shown below:

 1. You have that:

 (a ± b)^2=a^2 <span>± 2ab + b^2

 2. The expression given in the problem is:

 </span><span>x^2-10x+n

 Where x^2=a and 2ab=10x

 2b=10
 b=10/2
 b=5

 3. Therefore, you have:

 b^2=5
 b^2=25

 b^2=n
 n=25</span>
7 0
4 years ago
Read 2 more answers
Ram is 9 years older than Hari. Three years ago, he was two times as old as Hari was. Find their present age.
True [87]

Answer:

Ram: 21, Hari: 12

Step-by-step explanation:

To solve the problem, we can use the following notation. We call:

r = Ram's age at present

h = Hari's age at present

We know that:

- Ram is 9 years older than Hari --> mathematically, this can be written as

r=h+9

- Three years ago, Ram was two times as old as Hari was --> mathematically, this can be written as

r-3=2(h-3)

where (r-3) is Ram's age 3 years ago, while (h-3) is Hari's age 3 years ago

Substituting eq.(1) into eq.(2), we  find:

(h+9)-3=2(h-3)\\h+9-3=2h-6\\h+6=2h-6\\h=12

So, Hari's age is 12; therefore, Ram's age is

r=12+9=21

4 0
4 years ago
Test for origin symmetry:<br> y=x/(x^2+1)
Korolek [52]

y=\dfrac{x}{x^2+1}\\\\ -y=-\dfrac{-x}{(-x)^2+1}\\ -y=\dfrac{x}{x^2+1}\\ y=-\dfrac{x}{x^2+1}


-\dfrac{x}{x^2+1}\not =\dfrac{x}{x^2+1} so it's not symmetrical about the origin.

6 0
3 years ago
PLS HELP ASAP THIS IS DUE SOON... WHOEVER ANSWERS FIRST WILL BE MARKED AS BRAINLYEST!!!!
Maru [420]

Answer:

40m^2    152.6m^2

Step-by-step explanation:

7 0
3 years ago
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