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3 years ago

What is the answer of x2-25

Mathematics

1 answer:

snow_tiger [21]3 years ago

6 0

Answer:

(x - 5)(x + 5)

Step-by-step explanation:

use formula

a² - b² = (a - b)(a + b)

x² - 25 = x² - 5² = (x - 5)(x + 5)

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Evaluate. Please help me!!!

Mademuasel [1]

Answer:

670

Step-by-step explanation:

(3*1+2)+(3*2+2)+........(3*20+2)=670

5 0

3 years ago

Someone help with this

timama [110]

Answer:

18% decrease

Step-by-step explanation:

7,500 - 6,125 = $1,375
Set up a proportion: $\frac{1375}{7500} = \frac{x}{100}$
Cross multiply, then divide: 1375 × 100 = 137500, 137500 ÷ 7500 = 18 1/3
18 1/3% rounded = 18%
It went down, so it is a decrease

I hope this helps!

7 0

3 years ago

Read 2 more answers

Which of the expressions are equivalent to the one below? Check all that apply. 3 x (7+2)

faust18 [17]

3 x (7+2) all you have to do is add 7+2 and that is 9 and then you have to multiply 3 x 9

3 0

3 years ago

You need a mean of at least 90 points to advance to the next round of the touch-screen trivia. What score in the fifth game will

lianna [129]

Answer:

At least 98 is needed in the 5th game

Step-by-step explanation:

The missing parameters are:

$Game\ 1 = 95$

$Game\ 2 = 91$

$Game\ 3 = 77$

$Game\ 4 =89$

$Mean = 90$ at least

Required

The score in game 5 to make you advance

Mean is calculated as:

$Mean = \frac{\sum x}{n}$

So, we have:

$Mean = \frac{95 + 91 + 77 + 89 + Game\ 5}{5}$

$Mean = \frac{352 + Game\ 5}{5}$

The mean must be at least 90.

So, we have:

$\frac{352 + Game\ 5}{5} \ge 90$

Multiply both sides by 5

$5 * \frac{352 + Game\ 5}{5} \ge 90 * 5$

$352 + Game\ 5 \ge 450$

Make Game 5 the subject

$Game\ 5 \ge450 - 352$

$Game\ 5 \ge 98$

At least 98 is needed in the 5th game

4 0

3 years ago

What is the answer to EVAULATE 8+-9+-6

LenKa [72]

Answer:

Step-by-step explanation:

8 + 9 + -6

8 + 9 = 17

17 + (-6) = 11

Answered by Gauthmath

6 0

3 years ago