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bazaltina [42]
2 years ago
6

Help me please, evaluate the expressions below if (a=8), (b=-2) and (c=-9).

Mathematics
2 answers:
Naddika [18.5K]2 years ago
8 0

Answer:

<em>100 </em>

Step-by-step explanation:

Evaluate the expressions | - a² - 2bc | if a = 8, b = - 2 and c = - 9.

| - 8² - 2( - 2 )( - 9 ) | = | - 64 - 36 | = | - 100 | = <em>100</em>

maxonik [38]2 years ago
5 0

-(8^2) - 2(2)(9)=

-64-36

Final answer: -100

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Which function has a vertex on the y-axis? f(x) = (x – 2)2 f(x) = x(x 2) f(x) = (x – 2)(x 2) f(x) = (x 1)(x – 2)
makvit [3.9K]

The function that has a vertex on the y-axis is f(x) = (x - 2)(x + 2)

<h3>How to determine the function?</h3>

For a function to have its vertex on the y-axis, then the coordinate of the vertex must be:

(h,k) = (0,y)

A quadratic function is represented as:

f(x) = (x - h)^2 + k

So, we have:

f(x) = (x - 0)^2 + k

Evaluate

f(x) = x^2 + k

From the list of options, we have:

f(x) = (x - 2)(x + 2)

Expand

f(x) = x^2 - 4

Hence, the function that has a vertex on the y-axis is f(x) = (x - 2)(x + 2)

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brainly.com/question/18797214

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8 0
2 years ago
Please answer this correctly
jarptica [38.1K]

Answer:

18 roses

Step-by-step explanation:

In the given stem-leaf chart, 18 is the smallest number having 1 as "stem" and 8 as "leaf".

4 0
3 years ago
hana paid 1,200 for the carpet in her living room. the room has an area of 251.2 square feet. what was her unit cost of carpetin
rosijanka [135]
Itd be $4.78 
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8 0
3 years ago
The base of an isosceles triangle is one and a half times the length of the other two sides.A smaller triangle has a perimeter t
Anna11 [10]

Answer:

Perimeter of the smaller triangle = 1.75x

Step-by-step explanation:

Let the two equal sides of an isosceles triangle = x

Therefore, length of the base = (1\frac{1}{2})x

Perimeter of this isosceles triangle = x + x + (1\frac{1}{2})x

                                                          = 2x + (1+\frac{1}{2})x

                                                          = 2x + x + \frac{x}{2}

                                                          = \frac{5x}{2}

Since, smaller triangle has a perimeter that is half the perimeter of the larger triangle,

Length of each corresponding side of smaller triangle will be half of the larger triangle.

Length of sides of the smaller triangle = \frac{x}{2},\frac{x}{2},(1\frac{1}{2})\frac{x}{2}

Perimeter of the smaller triangle = \frac{x}{2}+\frac{x}{2}+(1\frac{1}{2})\frac{x}{2}

                                                      = x + \frac{x}{2}+\frac{x}{4}

                                                      = \frac{3}{2}x+\frac{x}{4}

                                                      = \frac{6}{4}x+\frac{x}{4}

                                                      = \frac{7}{4}x

                                                      = 1.75x

Therefore, expression that represents the perimeter of the smaller triangle is (1.75x)        

4 0
2 years ago
What is the value of x?
jeka57 [31]

Answer:

The answer is 6

Step-by-step explanation:

3 times 2 equals six

8 0
3 years ago
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