4 years ago

Which system of inequalities is show below

Mathematics

1 answer:

weeeeeb [17]4 years ago

4 0

the answer would be c

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Take the equation 103=-7(x+8)+7(x+7). Jamie says this equation has no solution. Mick says it does. Who is correct? Why?

meriva

$&#128075$ Hello ! ☺️

Step-by-step explanation:

$103 = - 7(x + 8) + 7(x + 7)$

$103 = - 7x - 56 + 7x + 49 = 0x + 7$

0x= 7 => x ∉ |R

$\boxed{\color{gold}{S = ∅}}$

Jamie is right.

* Any number multiplied by 0 gives 0.

4 0

4 years ago

Verify that (sinx-cosx)2 = 1 - 2 sin xcosx is an identity.

Mars2501 [29]

$(sin x - cos x)^{2} = 1 - 2 sin x cos x$

Step-by-step explanation:

Step 1 : Taking L.H.S(Left Hand Side) we have,

$(sin x - cos x)^{2} = sin^{2} x + cos^{2} x - 2 sin x cos x$ ... equation (1)

Step 2 : As we know, $sin^{2} x + cos^{2} x = 1$

Therefore,

by substituting value in equation (1), we have

$1 - 2 sin x cos x$

Step 3 : As, L.H.S = R.H.S

Hence Proved,

$(sin x - cos x)^{2} = 1 - 2 sin x cos x$

5 0

3 years ago

Use a power of ten to estimate the product. 9 x 77.4. Please i need help!!!

Alex73 [517]

Answer:

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6 0

3 years ago

Read 2 more answers

The diagonals must be congruent in which of the following:

barxatty [35]

Diagonals must be congruent in a rectangle.

7 0

3 years ago

Help!!!!!!!!!!!!!!!!!!!!!!!!!

MA_775_DIABLO [31]

30 60 90 triangle

ratio short leg : long leg : hypotenuse = a : a√3 : 2a (where a = short leg)

Answer is D.

4 , 4√3 , 8

short leg = 4

long leg = short leg times √3 = 4√3

hypotenuse = 2 times short leg = 2 * 4 = 8

4 0

4 years ago