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torisob [31]
3 years ago
11

Find the value of expression - 17x-19xpwer4 - 21x power 2,when x=3​

Mathematics
1 answer:
Marrrta [24]3 years ago
7 0

Answer:

-17x - 19x^4 - 21x^2 = -1779 when x = 3

Step-by-step explanation:

Given

-17x - 19x^4 - 21x^2

x = 3

Required

Solve

Substitute 3 for x in -17x - 19x^4 - 21x^2

-17x - 19x^4 - 21x^2 = -17*3 - 19*3^4 - 21*3^2

Evaluate all exponents

-17x - 19x^4 - 21x^2 = -17*3 - 19*81 - 21*9

-17x - 19x^4 - 21x^2 = -51 - 1539- 189

-17x - 19x^4 - 21x^2 = -1779

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For options A– E choose all of the expressions that are equivalent to 3(4x + 3).
Katen [24]
3(4x+3) = 12x + 9
A= 3(4x+1)
B= 9 + 12x
C= 7x + 6
D= 12x + 9
E= 12x + 9

Answer: D, E

Hope This Helps✨
3 0
3 years ago
If quadrilateral ABCD is a parallelogram, what are the correct values for x and y? x = 30, y = 3 x = 30, y = 2 x = 70, y = 2 x =
jeka57 [31]

Answer:

-70 is the correct answer

Step-by-step explanation:

To add fractions, find the LCD and then combine

4 0
3 years ago
Read 2 more answers
Please help me with this math problem!
Mice21 [21]
W=x
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Double everything since we need to lengths and two widths to find the perimeter

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Combine like terms

6x+34=76
Solve for x
First step is subtract 34 from both sides

6x=42
Next you divide both sides by 6 in order to get x by itself

X=7

Now you plug in 7 into the x’s in length and width

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THE WIDTH IS 31 CM

Check:

7+7+31+31 = 76 cm
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7 0
2 years ago
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Answer:

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Step-by-step explanation:

Use the slope formula and slope intercept formula form y=mx + b to find the equation

3 0
2 years ago
The sum of three consecutive integers is 48. What are the three numbers?
Alinara [238K]

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