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3 years ago

Maya is showing her work in simplifying (5.2 − 4.5) − 5.5 + 4.8. Identify any error in her work or reasoning. (5 points)

Mathematics

2 answers:

PolarNik [594]3 years ago

8 0

She wrote identity instead of associative in Step 2.

Nady [450]3 years ago

7 0

Hello,

The correct answer is D) She wrote identity instead of associative in Step 2.

Hope this helps!!!! :)

**(Vanessa)**

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I literally had one more then someone gave the wrong answer so will give crown

Ad libitum [116K]

Answer:

a) x=3

y= 4+4*3

=16

b) x=4

y= 4+4*4

= 20

c) x=7

y= 4+4*7

= 32

d) x=8

y= 4+4*8

= 36

4 0

3 years ago

The function f is defined by f(x)=3x^2-6. Find f(4z)

nlexa [21]

F(4z) = 3 * (4z)^2 - 6
= 48z^2 - 6

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4 years ago

A certain number of friends are waiting in line to board a new roller coaster. they can board the ride in 5,040 different ways.

Paraphin [41]

There are seven (7) friends.

The first friend to board can be any one of the 7. For each of them ...
The 2nd one to board can be any one of the remaining 6. For each of them ...
The 3rd one to board can be any one of the remaining 5. For each of them ...
The 4th one to board can be any one of the remaining 4. For each of them ...
The 5th one to board can be any one of the remaining 3. For each of them ...
The 6th one to board can be either of the remaining 2. For each of them ...
The 7th one to board is the last 1 standing.

The number of different ways that this could play out is

(7 x 6 x 5 x 4 x 3 x 2 x 1) = 5,040

6 0

3 years ago

Need to find the number for a

Shalnov [3]

Answer to the first triangle: 15

To solve this we will use the Pythagorean theorem

Pythagorean theorem formula: $a^{2} + b^{2} =c^{2}$

Lets do the first triangle.

17 is the hypotenuse, so its going to replace c in the formula.

8 is the height and it is going to replace a in the formula.

a is what we are trying to find, so our b in the equation is going to be the unknown.

$8^2 + b^2 = 17^2$

$64 + b^2 = 289

$

$b^2 = 289 - 64$

$b^2 = 225$

$\sqrt{b^2} = \sqrt{225}$

$b = 15$

now we know that the missing length in the first triangle (a) is 15

Can you solve the Other one?

Just comment if you need help on the other one.

4 0

4 years ago

X^2+8x+c Perfect square Trinomial

Anit [1.1K]

We know square of the sum formula
(a+b)²=a²+2ab+b²
so we need
x²+8x+c=(x²+2*4*x+4²)-16+c=(x+4)²+c-16,
so for full square we need c-16=0
c=16
Answer: c=16

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3 years ago