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iVinArrow [24]
4 years ago
6

Dos anyone know how much a is 2(a+7)-7=9

Mathematics
2 answers:
Oduvanchick [21]4 years ago
3 0

Answer:

a =1

Step-by-step explanation:

2(a+7)-7=9

Add 7 to each side

2(a+7)-7+7=9+7

2(a+7)=16

Divide by 2

a+7 = 16/2

a +7 = 8

Subtract 7

a+7-7 = 8-7

a = 1

DerKrebs [107]4 years ago
3 0

Answer:

a=1

Step-by-step explanation:

So we have the equation:

2(a+7)-7=9

And we want to find the value of a.

So, add 7 to both sides. The left side cancels:

2(a+7)=16

Divide both sides by 2:

a+7=8

Subtract 7 from both sides:

a=1

Therefore, the alue of a is 1.

And we're done!

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Determine whether the parallelogram is a rhombus, rectangle, square, or none. Explain.
lara31 [8.8K]

Answer:

Step-by-step explanation:

The diagonals of the given parallelogram are QS and RT. We would first determine if its diagonals are congruent.

QS = √(1 - 5)² + (3 - 3)² = 16

RT = √(3 - 3)² + (4 - 2)² = 4

Since QS ≠ RT, it means that they are not congruent and this means that the parallelogram is not a rectangle.

Let us check if the diagonals are perpendicular.

Slope of QS = (3 - 3)/(5 - 1) = 0/4

Slope of RT = (2 - 4)/(3 - 3) = - 2/0

The slopes are not opposite reciprocals. It means that the diagonals are not perpendicular. Therefore, the correct option is

D. QRST is none of these because its diagonals are neither congruent nor perpendicular.

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4 years ago
Kimmy has 47 ft.² of cement blocks each square block has size 1 foot long what is the greatest perimeter of a rectangle that she
blagie [28]

Answer:

The larges perimeter she can make becomes is 96 ft

Step-by-step explanation:

Here we note that the available brick is 47 ft²

Therefore, she has 47 square cement blocks

Let the length of the sides of the rectangle with the most perimeter be x and y

Then 2·x + 2·y = 47 which is not possible because 47 is a prime number

Hence we have the possible sides of the rectangle is a single line of square blocks such that

x × y  = 47 ft² where y = 1 hence x = 47

The larges perimeter she can make becomes, 2 × (1 + 47) = 96 ft.

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Step-by-step explanation:

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