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4 years ago

Please Help My question is a inequality. Solve the inequality algebraically. -2 x > -8

Mathematics

2 answers:

MAVERICK [17]4 years ago

8 0

Answer:

x < 4

Step-by-step explanation:

-2 x > -8

-2 -2

x < 4

Remember, a negative divided by a negative is a positive

ABOUT THIS INEQUALITY > SIGN:

Greater than
More than
Above
Exceeds

ABOUT THIS INEQUALITY < SIGN:

Less than
Fewer than
Below

ABOUT THIS INEQUALITY > SIGN:

Greater than/Equal to
No Less Than
At least
Minimum of

ABOUT THIS INEQUALITY < SIGN:

Less than/Equal to
No more than
At most
Maximum of

Hope this helps you!!! :)

Angelina_Jolie [31]4 years ago

6 0

To solve an equation or inequality, you need to isolate the variable you re trying to solve for on one side of the inequality/equation and ita value on the other side.

in -2x > -8
we can isolate x by dividing both sides by -2x so x is by itself

-2/-2 x = -8/-2
A number divided by itself is always 1, so it crossouts abd only leaves 1x ir just x
x = -4

I hope it helps

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What is 10 months after July

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May is the 10th month after july

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3 years ago

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Does this graph represent a function? What is the domain and range of the graph

Daniel [21]

Yes it is a function. It passes the vertical line test. In other words, it is impossible to draw a single vertical line through more than one point on the V shaped graph. Any input leads to exactly one output.

The domain is the set of all real numbers. This is because we can plug in any x value leading to some specific y value. There are no holes or gaps or jumps to indicate we must restrict any given x value. The domain would not be the set of whole numbers only because values between the whole numbers (eg: decimal values like x = 2.75) work just fine.

The range is the set of y values such that y is either 0 or larger than 0. In short, the range is $y \ge 0$ . Notice how any point on the V shaped graph has a y coordinate that is either 0 or larger than 0. It is impossible to get a y value that is negative.

--------------------------------------------------------------------

In summary,
Yes it is a function
Domain: all real numbers
Range: $y \ge 0$
So the answer is choice B

6 0

3 years ago

Is the point (1,5) a solution to the equation below?

allochka39001 [22]

Answer:

A. No

Step-by-step explanation:

y = 2x + 4

(5) = 2(1) + 4

5 = 2 + 4

5 = 6 (false statement)

7 0

3 years ago

Factor completely y^2-xy-56x^2

olga2289 [7]

You can factor this out by thinking of the factors of 56 that have a sum of -1. 7 and 8 are factors of 56 and to get a sum of -1, 8 should be negative. 7 + -8 = -1

So $y^{2} - xy - 56x^{2}$ factored out is (y+7x)(y-8x)

We can check this using FOIL
F = (y)(y) = $y^{2}$
O = (y)(-8x) = -8xy
I = (7x)(y) = 7xy
L = (7x)(-8x) = $-56x^{2}$
$y^{2} - 8xy + 7xy - 56x^{2}$ Combine like terms
$y^{2} - xy - 56x^{2}$

3 0

3 years ago

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PLS HELP ME WITH THIS!!!!!! HOW DID THEY GET 80ft^2

noname [10]

$\huge \boxed{\mathfrak{Question} \downarrow}$

Determine the surface area of the right square pyramid.

$\large \boxed{\mathfrak{Answer \: with \: Explanation} \downarrow}$

The formula for finding the surface area of a right square pyramid is ⇨ b² + 2bl, where

b = base of the right square pyramid
l = slant height of the right square pyramid.

In the given figure,

base (b) = 4 ft.
slant height (l) = 8 ft.

Now, let's substitute the values of b & l in the formula & solve it :-

$\sf \: {b}^{2} + 2bl \\ = \sf \: {4}^{2} + 2 \times 4 \times 8 \\ = \sf \: 16 + 8 \times 8 \\ = \sf \: 16 + 64 \\ = \huge\boxed{\boxed{ \bf 80 \: ft ^{2} }}$

So, the surface area of the right square pyramid is 80 ft².

7 0

3 years ago