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Scilla [17]
3 years ago
7

If the sum of two number is 19. Their difference is 3. What are the numbers?

Mathematics
1 answer:
Kobotan [32]3 years ago
4 0

x, y - the numbers

x + y = 19

x - y = 3        <em>add both sides of the equations</em>

2x = 22      <em>divide both sides by 2</em>

x = 11

Substitute the value of x to the first equation:

11 + y = 19     <em>subtract 11 from both sides</em>

y = 8

<h3>Answer: 11 and 8.</h3>
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If f(x) = 4x^2 and g(x) = x+1, find (f.g)(x).
Mandarinka [93]

Answer:

4x^3 + 4x^2

Step-by-step explanation:

f(x) = 4x^2

g(x) = x + 1

=> (f.g)(x) = 4x^2*(x + 1) = 4x^3 + 4x^2

Hope this helps!

3 0
3 years ago
3/4 (x - 3) - 5 = 1/8 ( x - 1 )
KonstantinChe [14]

Answer:

x = - \frac{57}{5}

Step-by-step explanation:

\frac{3}{4} (x - 3) - 5 = \frac{1}{8} (x - 1)

Multiply through by 8 to clear the fractions

6(x - 3) - 40 = x - 1 ← distribute parenthesis and simplify left side

6x - 18 - 40 = x - 1

6x - 58 = x - 1 ( subtract x from both sides )

5x - 58 = - 1 ( add 58 to both sides )

5x = - 57 ( divide both sides by 5 )

x = - \frac{57}{5}

3 0
3 years ago
What is sin(45)<br> A. -.25<br> B. -1.25<br> C. 63<br> D. .71
azamat

Answer:

D

Step-by-step explanation:

Sin(45) .70 rounded is 71

4 0
3 years ago
Read 2 more answers
Pleaseee helppppppppppppppppppp
quester [9]

To find Angle A we use cosine

cos ∅ = adjacent / hypotenuse

From the question

The adjacent is 17

The hypotenuse is 38

So we have

cos A = 17/38

A = cos-¹ 17/38

A = 63.4

<h3>A = 63° to the nearest degree</h3>

To find Angle C we use sine

sin ∅ = opposite / hypotenuse

From the question

The opposite is 17

The hypotenuse is 38

So we have

sin C = 17/38

C = sin-¹ 17/38

C = 26.57

<h3>C = 27° to the nearest degree</h3>

Hope this helps you

7 0
3 years ago
Simplify (2+3)squared-16 divided by 2
seraphim [82]

Answer:

it would be 4.5

Step-by-step explanation:

basic explantion

step 1.    3+2 =5

step 2     5x5=25

step 3      25-16=9

step 4       9 divde by 2= 4.5

simplifyed it would be  25-16 ÷ 2

more deatialed explanation.

I added 3+2 to get 5 and i sqaured the 5 to get 25 becasue 5x5 is 25 then i took away 16 and got 9 then i divde 9 by 2 to get 4.5.  hope this helped!

4 0
3 years ago
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