Find the roots of the polynomial equation -x^3+5x^2 - 11x+55=0

Answers

Answer 1

Answer:   x³ + 5x² - 11x + 55 = 0
x²(x) + x²(5) - 11(x) - 11(5) = 0
  (x²(x + 5) - 11(x + 5) = 0
(x² - 11)(x + 5) = 0
x² - 11 = 0     or        x + 5 = 0
+ 11 + 11 - 5 - 5
x² = 11 or x = -5
  x = ±√(11) or x = -5

THere are three roots in the polynomial equation.

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Simplify 1/4(8m - 4n) + 1/3(6m + 3n)
Quick question!!!!!!!

Which strategies can be used to solve this problem?The candle factory made 1,200 candles per month in June and July and 1,345 candles per month in August and September. What is the total number of candles they made in four months?
Choose all answers that are correct.

A.Use logical reasoning.
Multiply 1,200 by 2 to figure out how many candles were made in June and July. Multiply 1,345 by 2 to figure out how many candles were made in August and September. Add the two numbers together to find the total number of candles made in four months.
B.Draw a diagram.
Draw two circles. In one circle write 1,200 and in the other circle write 1,345. Add the numbers in the circles together.
C.Work backward.
Divide 1,200 by 2 (for the 2 months, June and July). Then divide 1,345 by 2 (for the 2 months August and September). Add these two numbers.
D.Translate into an equation.
1,200 × 2 + 1,345 × 2 = c

Answers

you want total number made in 4 m onths, so adding all numbers is correct, but it is per 1 month, so multiply by 2

A because you need brain for most problems
D works

pick A and D

What is the factored form of the following expression? x2 – x – 42

Answers

(X-7)(X+6) is factored form expression

The simplified form is 2x-42

Use a calculator to work out
63,789 + 72,983 - 49,367
Give your answer to 2 s.f.

Answers

Answer:

87405

Step-by-step explanation:

D (t)=16t□2+96t+112 where t represents time in seconds

Answers

a.
the starting point is where t=0
d(0)=-16(0)^2+96(0)+112
D(0)=112
started from 112 feet

b. max height is vertex
for
y=ax^2+bx+c
the x value of the vertex is -b/2a

so
D(t)=-16t^2+96t+112
t value of vertex is -96/(2*-16)=3
it reaches after 3 seconds

C. simpliy evaluate D(t) for t=3
D(3)=-16(3)^2+96(3)+112
D(3)=-16(9)+288+112
D(3)=-144+400
D(3)=256
max height is 256ft

Gunner rides his bike 10 miles in 2 1/2 hours. How many miles per hour did Andre ride

Answers

Answer:

Step-by-step explanation:

10 miles divided by 2.5 hours is 4 miles per hour.

10/2.5 = 4

Write 2,784 in expanded notation as a addition expression.

Answers

2 x 1000
+7 x 100
+8 x 10
+4 x 1
2784

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