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2 years ago

Find and explain wallys mistake!!

Mathematics

1 answer:

Marysya12 [62]2 years ago

5 0

Answer:

What Wally did wrong is that it is supposed to be (4a-5)(a-4)

In order to get -21 a. He was supposed to use negative 5 and 4 to get to negative 21

If he used (4a+5)(a+5)

The answer will be positive 21 and that's not what the problem is asking

Step-by-step explanation:

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Please I don’t understand this one at all

Afina-wow [57]

Solution

2/3

Alternative Form
~3.4641

5 0

11 months ago

Can someone pls help and explain to me PLS

marshall27 [118]

I believe it is A since 14/16 Is equal to 7/8.

8 0

2 years ago

Simplify the expression with using scientific notation (4 times 10 8)2

SVETLANKA909090 [29]

y = (4*10^8)^2 Both factors in the brackets are squared.

4^2 = 16

(10^8)^2 = 10^(2*8) = 10^16

y = 16 * 10^16

y = 1.6 * 10^1 * 10^16

y = 1.6 * 10^(1 + 16)

y = 1.6 * 10^(17) <<<<<< Answer I'd use the brackets unless instructed not to.

3 0

2 years ago

What is the answer to: 2x(3+4)=14

Sav [38]

Answer:

x=1

Step-by-step explanation:

$2x*7=14\\14x=14\\x=1$

3 0

2 years ago

Read 2 more answers

The phone company NextFell has a monthly cellular plan where a customer pays a flat monthly fee and then a certain amount of mon

rosijanka [135]

Answer:

$y = 0.35x + 35$

Step-by-step explanation:

Linear equation:

A linear equation has the following format:

$y = mx + b$

In which m is the slope and b is the y-intercept.

Finding the slope:

We have two points: (110, 73.5) and (760, 301).

The slope is given by the change in y divided by the change in x. So

Change in y: 301 - 73.5 = 227.5

Change in x: 760 - 110 = 650

Slope: $m = \frac{227.5}{650} = 0.35$

$y = 0.35x + b$

Finding the y-intercept:

(760, 301) means that when $x = 760, y = 301$ . So

$301 = 0.35(760) + b$

$b = 301 - 0.35(760)$

$b = 35$

$y = 0.35x + 35$

4 0

2 years ago