3 years ago

Please Help Me Solve I’m In Middle School!!!

Mathematics

1 answer:

notka56 [123]3 years ago

8 0

Really this is easy it’s -6-(-1) bruh really

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Expand and simplify 2(x+7)+3(x+1)

kirza4 [7]

2(x+7)+3(x+1)
= 2x+14+3x+3
= 5x+17

6 0

3 years ago

In 2010, the continent of South America had a population of 395,280,204 . Which of the following is the closest estimate of this

Archy [21]

do you have answer choices? if so, the answer is whichever number is closest to 395,280,204

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4 years ago

Ming throws a stone off a bridge into a river below.

AURORKA [14]

Answer:

1 seconds after being thrown, the stone reaches its max height

Step-by-step explanation:

The parabolic (quadratic) equation is:

$h(x)=-5(x-1)^2+45$

Lets expand this in the form $ax^2+bx+c$ , so we have:

$h(x)=-5(x-1)^2+45\\h(x)=-5(x^2-2x+1)+45\\h(x)=-5x^2+10x-5+45\\h(x)=-5x^2+10x+40$

We can say the values of a,b, and c, now to be:

a = -5

b = 10

c = 40

The number of seconds at which the max would occur is given by the point, x, at:

$x=-\frac{b}{2a}$

We know a and b, let's find the seconds, x,

$x=-\frac{b}{2a}=-\frac{10}{2(-5)}=-\frac{10}{-10}=--1=1$

Hence,

1 seconds after being thrown, the stone reach its max height

6 0

4 years ago

Read 2 more answers

WILL GIVE BRAINLY NEED HELP BAD PLZ WUICK What is the perimeter of the triangle? units

AysviL [449]

Answer:

26units!

Step-by-step explanation:

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3 years ago

Prove that Tan x + Cos x = 1 /Sin x .Cos x

Anit [1.1K]

Answer:

tanx + cotx = $\frac{1}{sinxcosx}$

Step-by-step explanation:

Explanation

Take R.H.S = $\frac{1}{sinxcosx}$

= $\frac{sin^{2}x+cos^{2}x }{sinxcosx}$

= $\frac{sin^{2}x }{sinx cosx} + \frac{cos^{2} x}{sinxcosx}$

= $\frac{sinx}{cosx} + \frac{cosx}{sinx}$

= tanx + cotx

tanx + cotx = $\frac{1}{sinxcosx}$

5 0

3 years ago