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Damm [24]
4 years ago
9

What’s the equation to solve M+3n=7

Mathematics
1 answer:
11Alexandr11 [23.1K]4 years ago
5 0
Well i want to tell you the answer!! It is 76CJ
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Solve 7x-2x(x+1)=6x+14<br><br> A) x=-12<br> B) x=12<br> C) x=-16<br> D) x=16
prisoha [69]

Answer:

x=-16   (answer : C

Step-by-step explanation:

hello:

put x=-16 in this equation : 7x-2(x+1)=6x+14

7(-16)-2(-16+1)=6(-16)+14

-112-2(-15) = -96+14

-112+30= -96+14

-82 = -82 .....true

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3 years ago
How are percents used and what do they mean
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They're used to measure or divide things¿
4 0
3 years ago
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A rectangular garden is fenced on all sides with 256 feet of fencing. The garden is 8 feet longer than it is wide. Find the leng
Mekhanik [1.2K]
This is a bit of algebra.. you do not know either side so the width you will label x and the length you will label x +8. we know that if you add all 4 sides, you will have 256 feet. x + x + (x+8) + (x+8)=256  4x+16=256, Subtract 16 from both sides and you have 4x=240. divide by 4 on both sides and you get. x=60.. That makes the width = 60ft and the length = 68ft 
3 0
3 years ago
La suma de tres números enteros consecutivos es 156 halla los números
mars1129 [50]
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3 years ago
Length of a rectangle is 5 cm longer than the width. Four squares are constructed outside the rectangle such that each of the sq
Arte-miy333 [17]

Answer:

The perimeter of rectangle is 18\ cm

Step-by-step explanation:

Let

x------> the length of rectangle

y----> the width of rectangle

we know that

The area of the constructed figure is equal to

A=xy+2x^{2} +2y^{2}\\A=120\ cm^{2}

so

120=xy+2x^{2} +2y^{2} -----> equation A

x=y+5 -----> equation B

substitute equation B in equation A

120=y(y+5)+2(y+5)^{2} +2y^{2}\\120=y^{2}+5y+2(y^{2}+10y+25)+2y^{2}\\120=y^{2}+5y+2y^{2}+20y+50+2y^{2}\\5y^{2}+25y+50-120=0\\5y^{2}+25y-70=0

using a graphing calculator to resolve the quadratic equation

the solution is

y=2\ cm

Find the value of x

x=2+5=7\ cm

Find the perimeter of rectangle

The perimeter of rectangle is equal to

P=2(x+y)\\P=2(7+2)=18\ cm

3 0
4 years ago
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