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3 years ago

HURRY UP AND PLZ ANSWER,THIS IS FOR A GRADE AND I NEED TO PASS, I WILL GIVE BRAINLIEST

Mathematics

2 answers:

Dominik [7]3 years ago

6 0

Answer:

Step-by-step explanation:

yea

Lilit [14]3 years ago

5 0

Answer:

22 jk 4 lol ofc

Step-by-step explanation:

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For every 30 minutes she dances, Nell stretches for 10 minutes. What is the ratio value of the time Nell dances to the

pashok25 [27]

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Step-by-step explanation:

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2 years ago

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If a plane can travel 490 miles per hour with the wind and 430 miles per hour against the wind, find the speed of the wind and

zavuch27 [327]

let the speed of plane in still air be x and that wind be y

therefore:

x+y=490

x-y=390

next we solve for the values of x and y, first we add the above equations. This will give us:

2x=880

x=880/2

x=440 miles per hour.

substituting the value of x in one of the equations and solving for y we get:

440+y=490

y=490-440

y=50 miles per hour

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3 years ago

Solve for x : log(3x) + log(x + 4) = log(15).<br><br>Please explain it to me.

zlopas [31]

Answer:

x = 1

Explanation:

$\sf \rightarrow log(3x) + log(x + 4) = log(15)$

Rule: log(a) + log(b) = log(ab)

$\sf \rightarrow log(3x(x + 4)) = log(15)$

cancel out log on both sides

$\sf \rightarrow 3x(x + 4) = 15$

relocate constant variable

$\sf \rightarrow 3x^2 + 12x -15 = 0$

take 3 as a common factor

$\sf \rightarrow 3(x^2 + 4x -5) = 0$

divide both sides by 3

$\sf \rightarrow x^2 + 4x -5 = 0$

middle term split

$\sf \rightarrow x^2 + 5x -x-5 = 0$

factor common terms

$\sf \rightarrow x(x + 5) -1(x+5)= 0$

collect into groups

$\sf \rightarrow (x-1)(x+5)= 0$

set to zero

$\sf \rightarrow x-1 = 0 , \ x+5= 0$

relocate variables

$\sf \rightarrow x = 1, \ x = -5$

There must be a positive solution for log, so the solution is only x = 1

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2 years ago

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The area of the trapezoid is 9 square centimeters.

Lana71 [14]

Answer:

Height : 3 cm

Step-by-step explanation:

The formula for a trapezoid is

<u> a+b</u> ×height

Rearrange for formula :

$2 \times \frac{area}{ base + base }$

$2\frac{9}{ 4 + 2 } = 3cm$

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2 years ago

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Jenna live 4 3/10 miles from school. She estimates that she travels 4x2x5,or 40 miles each week.Is her estimate an overestimate

umka21 [38]

Hey

Jenna lives 4 3/10 miles from school, she estimates that she travels 4 x2x5 or 40 miles each week. Is her estimate an over estimate or underestimate? I think it is under estimate but not sure?

Hoped I Helped

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3 years ago

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