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3 years ago

Algebra question PLEASE HELP ILL GIVE BRAINLIEST (Picture Attached)

Mathematics

1 answer:

ella [17]3 years ago

7 0

Sometimes a diagram can be helpful. If x is the distance from the house to the parallel side of the fenced plot, then the total length of fence will be x + x + 30 (feet). Jane wants to find x such that this length is 100 (feet).

The appropriate equation is ...

... A. x + x + 30 = 100

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What is 850 in scientific notation?

jonny [76]

Answer:

it is 8.5 x 10^2 because when you times the 10 twice and then multiply it with 8.5 and the decimal moves

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3 years ago

Apply the distributive property to create an equivalent expression,<br><br> (m-3+4n)*(-8)

MakcuM [25]

Answer:

-8m +24 -32n

Step-by-step explanation:

(m-3+4n)*(-8)

Distribute the -8 to each term inside the parentheses

-8*m -8*-3 -8*4n

-8m +24 -32n

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4 years ago

Read 2 more answers

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Sloan [31]

Answer:

oii sou islaine e tenho 1anosme manda mensagem fofo vc tem namorada gatinho me manda mensagem taaa agora me manda ta

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3 years ago

You have 80 grams of a radioactive kind of vanadium. How much will be left after 48 days if it’s half-life is 16 days?

Tresset [83]

10 grams Vanadium will be left after 48 days

Further explanation:

Half-life is the time after which the chemical is reduced to half.

The reaming mass after half life is given by:

$mass\ fater\ half\ life=\frac{Original\ mass}{2}$

The formula for calculating the remaining mass after given time period is:

$Remaining\ substance=\frac{1}{2^n}*mass$

Here n is the number of half lives passed

Now,

Given

Mass=80 grams

Time= 48 days

Half-life = 16 days

The number of half lives will be:

$n=\frac{48}{16}=3$

Putting the values of n and mass in the formula

$Remaining\ substance=\frac{1}{2^3}*80\\=\frac{1}{8}*80\\=10\ grams$

10 grams Vanadium will be left after 48 days

Keywords: Half-life, radioactive

Learn more about half-life calculation at:

#LearnwithBrainly

6 0

3 years ago

Determine whether f(x) = –5x^2 – 10x + 6 has a maximum or a minimum value. Find that value and explain how you know.

polet [3.4K]

Answer:

The vertex is the point (-1,11). is a maximum

Step-by-step explanation:

we know that

The equation of a vertical parabola in vertex form is equal to

$f(x)=a(x-h)^{2}+k$

where

(h,k) is the vertex

a is a coefficient

if a > 0 the parabola open upward and the vertex is a minimum

if a < 0 the parabola open downward and the vertex is a maximum

we have

$f(x)=-5x^{2}-10x+6$

Convert to vertex form

Complete the square

$f(x)-6=-5x^{2}-10x$

Factor the leading coefficient

$f(x)-6=-5(x^{2}+2x)$

$f(x)-6-5=-5(x^{2}+2x+1)$

$f(x)-11=-5(x^{2}+2x+1)$

Rewrite as perfect squares

$f(x)-11=-5(x+1)^{2}$

$f(x)=-5(x+1)^{2}+11$

The vertex is the point (-1,11)

The coefficient a=-5

a < 0 the parabola open downward and the vertex is a maximum

5 0

4 years ago