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Savatey [412]
3 years ago
12

Solve the problem.

Mathematics
2 answers:
Goshia [24]3 years ago
4 0
Imagine a 'U' shape
sides are x legnth
base is b legnth
2x+b=25

area is height times base=xb

xb=50
2x+b=25
solve
minus 2x both sides
b=25-2x
sub for b
x(25-2x)=50
25x-2x^2=50
times -1 both sides
2x^2-25x=-50
add 50 both sides
2x^2-25x+50=0
use quadratic formula or something
x=2.5 or 10

A is the answer

puteri [66]3 years ago
3 0
The right option is A.
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this is the explanation.

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Isabella painted her bedroom. She used 2 gallons of paint and finished in 8 hours. At what rate did Isabella paint the room?
GrogVix [38]

Answer:  " \frac{1}{4} gal /hr ;  or, write as:  " 0.25 gal/hr. " .

_______________

Step-by-step explanation:

_______________

This is a "unit rate" problem;

that is:  we want to solve for a particular quantity per [single] unit.

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→ in this case, per single "hour" ;

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So we convert:

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" 2 gal per 8 hours" ; to the correct number of:

 _?_ gal per [single] hr.

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{<u>Note</u>:  "gal" refers to:  "gallon(s)" ;

           "hr" refers to:  "hour(s)" .}.

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→ " \frac{2 gal}{ 8 hr} = [\frac{2}{8}] gal / hr. " ;

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→ " { \frac{2}{8} = [2÷2] / [8÷2] = 1/4 ;

_______________

So, the answer is:  

  → " \frac{1}{4} gal /hr " ;

_______________

 or: write as decimal:

  → " \frac{1}{4} = (1 ÷ 4) = 0.25 " ;

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write the answer as:

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  → " 0.25 gal/hr. "

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Or, when we had:

 → "2/8" gal/hr ;

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 Use calculator:

 → " \frac{2}{8} = "2 ÷ 8" ;

 =  " 0.25 gal/ hr.

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So:  The correct answer is:

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 " \frac{1}{4} gal /hr ;  or, write as:  " 0.25 gal/hr. " ;

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Hope this is helpful to you!

Best wishes in your academic endeavors—

  and within the "Brainly" community!

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6 0
3 years ago
A caterer charges $120 for 15 people to cater a party and $7 per person after that.
Nitella [24]

Answer

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Step-by-step explanation:

7 0
4 years ago
What is the value of n in the equation -1.2(2n+4)+6=-9+4(2n+1)
Shalnov [3]

Answer:

n = 6.2/-10.4=0.5962

Step-by-step explanation:

What is the value of n in the equation. we would make n the subject formula -1.2(2n+4)+6=-9+4(2n+1)

Opening the brackets,

-1.2×2n -1.2×4 + 6= -9 +4×2n + 4×1

-2.4n -4.8 +6 = -9 +8n + 4

-2.4n -4.8 +6 = -9 + 4 + 8n= -5+8n

Collecting like terms

-2.4n-8n = -5+4.8-6

-10.4n =-6.2

n = -6.2/-10.4= 0.5962

Let's check, put n= 0.5962 in the equation

-2.4n -4.8 +6 = -9 +8n + 4

Lefthand side

-2.4×0.5962-4.8+6= -0.230

Right hand side

-9+ 8× 0.5962 +4

=-9 +4.7696 +4

=0.230

Right hand side = left hand side

4 0
3 years ago
Read 2 more answers
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