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3 years ago

Which comparison is not correct? |-7| > -9 |-2| |-9| -8 < |-4|

Mathematics

1 answer:

Juliette [100K]3 years ago

6 0

Answer:

The third one is the one that's not correct.

Step-by-step explanation:

|8| is just 8 but |-9| is 9. So in that case |8| is not greater than 9.

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Can someone help me please

dmitriy555 [2]

Answer:

Step-by-step explanation:

The rule with like bases is that when you multiply them you add their exponents.

$m^4*m^1=m^5$

Therefore, our final simplification is

$4m^5n^7$

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2 years ago

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Which expressions are equal to 0 when x=-1? Check all that apply.

Reptile [31]

Answer:

4(x+1)/(4x+5)

4(x+1)/(5-4x)

4(x-(-1))/(4x+5)

Step-by-step explanation:

The numerators in the fractions must equal to 0, or else the expressions won’t have the result of 0.

4(x+1)

4(-1+1)

4(0)

= 0

4(x-(-1))

4(-1-(-1))

4(-1+1)

4(0)

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2 years ago

What is 2(2+4x)+6(3x-4)

d1i1m1o1n [39]

Answer:

26x-20

Step-by-step explanation:

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2 years ago

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40 = 90^2/16 sinx cosx find x

lbvjy [14]

Answer:

Step-by-step explanation:

Given the expression

$40=\frac{90^2}{16} sinxcosx\\\\Cross\ multiplying;\\\\16*40 = 90^2 sinxcosx\\\\640 = 90^2 sinxcosx\\\\\frac{640}{8100} = sinxcosx\\ from\ trig\ identity, sin2x = 2sinxcosx\\sinxcosx = sin2x/2\\$

$Hence, \ \frac{640}{8100} = \frac{sin2x}{2} \\\\\frac{2*640}{8100} = sin2x\\ \\\frac{1280}{8100}=sin2x\\ \\0.158 = sin2x\\\\2x = sin^{-1} 0.158\\\\2x = 9.09\\x = 9.09/2\\x =4.545$

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2 years ago

Which number below best represents a depth of two meters below the ground?

Slav-nsk [51]

Answer:

-2

Step-by-step explanation:

We usually start measuring the height from the ground, so basically the positive direction is above the ground, for example 2 is the best number which represents 2m above the ground.

So the negative sign represents the depth below the ground.

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1 year ago