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3 years ago

9

HELP PLEASE QUICK! its 7-grade math

2 answers:

musickatia [10]3 years ago

5 0

answer:

1. yes

2. no

3. yes

4. no

step-by-step explanation:

for 1, yes because no matter what they are the signs are still the same
for 2, no because the signs have changed — 2/5 is positive now
yes because even though there is addition now, the signs are the same. when you use kcc (keep change change), the sign changes to +
no, because the coefficient for p is changed, which won't be true or give us the same result

algol133 years ago

3 0

Yes, no, Yes, no just a simple answer

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Find the area of a regular hexagon with radius length 4 m.

ivann1987 [24]

Answer:

Step-by-step explanation:

24√3

6 0

3 years ago

Help please asap will mark brainliest !

Ber [7]

Answer:

b = 29

Step-by-step explanation:

C x D = A x B

15(11x - 91) = 7(2x + 10)

165x - 1365 = 14x + 70

add 1365 to both sides of the equation:

165x = 14x + 1435

subtract 14x from both sides:

151x = 1435

divide both sides by 151:

x = 9.5

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3 years ago

Find a compact form for generating functions of the sequence 1, 8,27,... , k^3

pantera1 [17]

This sequence has generating function

$F(x)=\displaystyle\sum_{k\ge0}k^3x^k$

(if we include $k=0$ for a moment)

Recall that for $|x|$ , we have

$\displaystyle\frac1{1-x}=\sum_{k\ge0}x^k$

Take the derivative to get

$\displaystyle\frac1{(1-x)^2}=\sum_{k\ge0}kx^{k-1}=\frac1x\sum_{k\ge0}kx^k$

$\implies\dfrac x{(1-x)^2}=\displaystyle\sum_{k\ge0}kx^k$

Take the derivative again:

$\displaystyle\frac{(1-x)^2+2x(1-x)}{(1-x)^4}=\sum_{k\ge0}k^2x^{k-1}=\frac1x\sum_{k\ge0}k^2x^k$

$\implies\displaystyle\frac{x+x^2}{(1-x)^3}=\sum_{k\ge0}k^2x^k$

Take the derivative one more time:

$\displaystyle\frac{(1+2x)(1-x)^3+3(x+x^2)(1-x)^2}{(1-x)^6}=\sum_{k\ge0}k^3x^{k-1}=\frac1x\sum_{k\ge0}k^3x^k$

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so we have

$\boxed{F(x)=\dfrac{x+4x^3+x^3}{(1-x)^4}}$

5 0

3 years ago

What is the value of x in the equation 5x+3=4x?

Volgvan

Answer:

x = -3

Step-by-step explanation:

5x + 3 = 4x,

x + 3 = 0,

x = -3

3 0

3 years ago

Read 2 more answers

Is this answer correct?

andre [41]

Thx no that answer is not correct

5 0

3 years ago

Read 2 more answers