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balu736 [363]
3 years ago
15

SOMEONE HELP ME ON THESE QUESTIONS

Mathematics
1 answer:
dem82 [27]3 years ago
4 0

1.)  The sum(addition) of 21 and 5 times(multiplication) a number f is(=) 61.

f = unknown number/variable     [So 21 plus 5f(5 times f) equals 61]

21 + 5f = 61   [21(one-time) + 5f(number x variable) = 61(total)]

2.)  Seventeen more(addition) than seven times(multiplication) a number j is(=) 87.

j = unknown number/variable    [So 17 plus 7j(7 times j) equals 87]

17 + 7j = 87  

3.)   n = number of calls

18 + 0.05n = 50.50  

[Company charges $18 plus five cents per call(n), and the total charge was $50.50]

4.)     s = the number of students

40 + 30s = 220

[Tutor charges $40 plus $30 per student(s), and the total charge was $220]

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How do you simplify this equation
Inga [223]
1) -2/2i
2) you divide the 2's
3) -1/i
7 0
3 years ago
Read 2 more answers
I am simplifying radicals and I've come across one that has me a bit confused.
zhenek [66]

The sqrt of (34 m^4) is  sqrt(34) times sqrt(m^4).

The sqrt of m^4 is easy ... that's just  m^2 .

The other part is more messy.  There's not much you can do with it.

                      sqrt(34) = sqrt(17) times sqrt(2). 

That doesn't help make it any simpler.
You might as well just leave it as sqrt(34). 

Then the final, simplified form of the original expression is

                          m^2 sqrt(34)
5 0
3 years ago
Simplify (x2y)3. need this asap
bogdanovich [222]

Answer:

3x^2y

Step-by-step explanation:

hope this helps : )

4 0
3 years ago
The difference between the square of two numbers is five. Twice the square of the second number is subtracted from three times t
svet-max [94.6K]
Let us assume the first number to be = x
Let us assume the second number to be = y
Then
x^2 - y^2 = 5
x^2 = y^2 + 5
And
3x^2 - 2y^2 = 19
Multiplying the first equation by -2, we get
- 2x^2 + 2y^2 = - 10
Now subtracting the two equations, we get
x^2 = 9
x = 3
Putting the value of "x" in the first equation, we get
(3)^2 - y^2 = 5
9 - y^2 = 5
y^2 = 4
y = 2

I hope that the procedure is clear enough for you to understand and this is the answer that you were looking for.
5 0
3 years ago
NEED HELP ASAP, PLEASE
kozerog [31]

Answer:

3

Step-by-step explanation:

8x and 7x + 3 are vertically opposite angles.

Vertically opposite angles are equal,

8x = 7x + 3

8x - 7x = 3

x = 3

6 0
2 years ago
Read 2 more answers
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