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Irina-Kira [14]
3 years ago
15

What does this equal? -1/5p=-16

Mathematics
1 answer:
Vlad [161]3 years ago
5 0
P=80 <---this is the answer
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Answer this please I need a real answer
Anna11 [10]

Answer:

see explanation

Step-by-step explanation:

(a)

x² + 2x + 1 = 2x² - 2 ( subtract x² + 2x + 1 from both sides

0 = x² - 2x - 3 ← in standard form

0 = (x - 3)(x + 1) ← in factored form

Equate each factor to zero and solve for x

x + 1 = 0 ⇒ x = - 1

x - 3 = 0 ⇒ x = 3

-----------------------------------

(b)

\frac{x+2}{3} - \frac{2}{15} = \frac{x-2}{5} ( multiply through by 15 to clear the fractions )

5(x + 2) - 2 = 3(x - 2) ← distribute parenthesis on both sides

5x + 10 - 2 = 3x - 6

5x + 8 = 3x - 6 ( subtract 3x from both sides )

2x + 8 = - 6 ( subtract 8 from both sides )

2x = - 14 ( divide both sides by 2 )

x = - 7

--------------------------------------------

(c) Assuming lg means log then using the rules of logarithms

log x^{n} ⇔ nlogx

log x = log y ⇒ x = y

Given

log(2x + 3) = 2logx

log(2x + 3) = log x² , so

x² = 2x + 3 ( subtract 2x + 3 from both sides )

x² - 2x - 3 = 0

(x - 3)(x + 1) = 0

x = 3 , x = - 1

x > 0 then x = 3

6 0
3 years ago
You want to know the mean number of sick days taken by students in your county last year. At each of five schools you randomly s
Assoli18 [71]

Answer:

4

Step-by-step explanation:

Add each sample separately

A.17   B. 47   C. 39 D. 52 E. 45

Then you add them all together which totals 200 sick days

We know that they surveyed 5 schools and 10 students at random from each one. So we want to know the mean of sick days the students took not the schools in all.

So we divide 200/50

And get a mean of 4.

So each student took an average of 4 sick days each in the country.

3 0
3 years ago
Write an equation of the line<br> parallel to y = - 3x + 7<br> y-intercept = 0
polet [3.4K]

A parallel line to y = -3x+7 with a y intercept of 0 is

y = -3x + 0, or you could simply write it as y = -3x

3 0
2 years ago
I need help with this!!
leonid [27]

Answer:

c = 12.5

Step-by-step explanation:

Pythagorean Theorem:

c^2 = 10^2 + (7.5)^2

c = 12.5

6 0
2 years ago
Read 2 more answers
Choose all that apply. What type of numbers represent parts of a whole?
yulyashka [42]
Fractions and decimals. (And maybe integers because some are decimals)
6 0
3 years ago
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