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3 years ago

Which of the Following is an example of commutative property of addition.

Mathematics

1 answer:

katen-ka-za [31]3 years ago

8 0

The answer is
A. 3+9=9+3

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Which value is a solution of the equation x2 (squared) = 49?

Talja [164]

Answer:

24.5

Step-by-step explanation:

If you multiply 2 and 24.5 together you would get 49

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3 years ago

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The question in image... again, please help

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Answer: it looks like D

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3 years ago

What is the area, in square centimeters, of the trapezoid below? 18.2 cm 9.2 cm 8.3 cm

zubka84 [21]

Answer:
113.71 cm^2
Explanation m:
Area= a+b/2 h
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3 years ago

License plates in a particular state display 4 letters followed by 2 numbers. How many different license plates can be manufactu

bezimeni [28]

Depends on how many cars your talking about.Be more descriptive.

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4 years ago

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Please help! Thanks in advance.

alukav5142 [94]

In this problem, we need to plug in the given x values for $f(x)=0$ and find a and b.

When we plug in 1, we get: $2 \times {1}^{4} - 5 \times {1}^{3} - 14 \times {1}^{2} + a \times 1 + b = 0$

Simplify:
$2 - 5 - 14 + a + b = 0$
$- 17 + a + b = 0$
$a + b = 17$

We got our first statement about the values of the variables. If we find one more we can find those 2 variables.

We have another given root: 4.

Plug it in:
$2 \times {4}^{4} - 5 \times {4}^{3} - 14 \times {4}^{2} + a \times 4 + b = 0$
$512 - 320 - 224 + 4a + b = 0$
$- 32 + 4a + b = 0$
$4a + b = 32$

Now we have our second one. We can combine them:
$a + b = 17 \\ 4a + b = 32$

I use elimination method which is easier here.

Multiply the top equation by -1: $- a - b = - 17 \\ 4a + b = 32$

Add them up:
$3a = 15$

Simplify:
$a = 5$

Now we have a, we can plug in one of those equations to find b:
$5 + b = 17$
$b = 17 - 5$
$b = 12$

So, the answers are $a=5$ and $b=12$ .

6 0

3 years ago