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murzikaleks [220]
3 years ago
13

Answer the following! this is science!

Mathematics
1 answer:
diamong [38]3 years ago
6 0
Can’t see it at all post it again
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Evaluate the expression 4ab, for a =2 and b = 5
yan [13]

Answer:

40

Step-by-step explanation:

4x2=8

8x5=40

4 0
3 years ago
Read 2 more answers
Which expression are equivalent to 10x-20
kirill [66]

Answer:

10x-20

Step-by-step explanation:


7 0
4 years ago
Two opposite sides of a square with length x are increased by 3 units each and the other two opposite sides are decreased by 3 u
SCORPION-xisa [38]
All four sides of the original square have length s.

Adding 3 to s results in s+3, the length of the resulting rectangle.
Subtracting 3 from s results in s-3, the width of the rectangle.

The area of the rectangle is (s+3)(s-3) = s^2 - 9 = 27,  

and therefore s^2 = 36, and s = 6 square units.
5 0
3 years ago
Choose the correct vertex of the function f(x) = x2 - X + 2.
8_murik_8 [283]

Answer:

The vertex of the function is (\frac{1}{2}, \frac{7}{4})

Step-by-step explanation:

Vertex of a quadratic function:

Suppose we have a quadratic function in the following format:

f(x) = ax^{2} + bx + c

It's vertex is the point (x_{v}, y_{v})

In which

x_{v} = -\frac{b}{2a}

y_{v} = -\frac{\Delta}{4a}

Where

\Delta = b^2-4ac

If a<0, the vertex is a maximum point, that is, the maximum value happens at x_{v}, and it's value is y_{v}.

f(x) = x² - X + 2.

Quadratic equation with a = 1, b = -1, c = 2

So

\Delta = b^2-4ac = (-1)^2 - 4(1)(2) = 1 - 8 = -7

x_{v} = -\frac{(-1)}{2} = \frac{1}{2}

y_{v} = -\frac{-7}{4} = \frac{7}{4}

The vertex of the function is (\frac{1}{2}, \frac{7}{4})

4 0
3 years ago
2x+4 what is the value for x
Greeley [361]

Answer:

x = -2

Step-by-step explanation:

2x + 4 = 0

2x = -4

2x/2 = -4/2

x = -2

3 0
3 years ago
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