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3 years ago

Subtract the two expressions. 2b + 4 from -8b - 12

Mathematics

2 answers:

Sedbober [7]3 years ago

4 0

(2b+4)-(-8b-12) = 10b - 8

Artyom0805 [142]3 years ago

3 0

=2b+4+8b+12Combine Like Terms:=2b+4+8b+12=(2b+8b)+(4+12)=10b+16Answer:=10b+16

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Answer:

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General Formulas and Concepts:

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Order of Operations: BPEMDAS

Brackets
Parenthesis
Exponents
Multiplication
Division
Addition
Subtraction

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A rectangle and a square have the same perimeter. One side-length of the rectangle is $25\%$ longer than the other. What is the

S_A_V [24]

corrected question:

A rectangle and a square have the same perimeter. One side-length of the rectangle is 25% longer than the other. What is the ratio between the areas of the rectangle and the square?

Answer:

ratio of area of recatngle to square= 0.9879

Step-by-step explanation:

perimeter of rectangle = 2(L+B)

perimeter of a square = $4L_(s)$

L=B+0.25B

L=1.25B

$4L_(s)$ = 2(L+B)

$4L_(s)$ = 2(1.25B+B)

$4L_(s)$ = 2(2.25B)

$4L_(s)$ = 4.5B

B= 4/4.5 $L_(s)$

B= 0.889 $L_(s)$ ..........equ1

area of square = $L_(s)^{2}$

area of rectangle = L*B

=1.25B*B= $1.25B^{2}$

ratio of area of recatngle to square = $\frac{1.25B^{2} }{L_{s} ^{2}}$

referring to equ 1

ratio of area of recatngle to square = $\frac{1.25* (0.889L_{s}) ^{2} }{L_{s} ^{2}}$

= $\frac{ 0.9879L_{s} ^{2} }{L_{s} ^{2}}$

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3 years ago