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fgiga [73]
3 years ago
9

55% of what number is 70? Round to the nearest tenth.

Mathematics
2 answers:
umka2103 [35]3 years ago
5 0
55% of x is 70
0.55 times x=70
divide both sides by 0.55
127.27272727
round
127.3
Angelina_Jolie [31]3 years ago
5 0
To answer the question, let x be the unknown number. The product of this number and the decimal equivalent of the given percentage should be 70. The equation that best represent the given above is,
                                  0.55x = 70
                                 x = 70 / 0.55 =127.27
Thus, 55% of 127.27 is equal to 70. 
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rjkz [21]

Answer:

84 cm²

Step-by-step explanation:

Surface area of the polyhedron = the sum of the areas of each parts of the net = area of 2 triangles + area of each of the 3 rectangles

Area of 2 triangles:

Base = 4 cm

Height = 3 cm

Area of the 2 triangles = 2(½*base*height)

= 2(½*4*3) = 4*3 = 12 cm²

Area of rectangle with the following dimensions:

Length = 6 cm

Width = 4 cm

Area = length * width = 24 cm²

Area of rectangle with the following dimensions:

Length = 6 cm

Width = 5 cm

Area = length * width = 30 cm²

Area of rectangle with the following dimensions:

Length = 6 cm

Width = 3 cm

Area = length * width = 18 cm²

Surface area of the polyhedron = 12 + 24 + 30 + 18 = 84 cm²

5 0
3 years ago
Write an equation of the line that passes through the point (-4,-1) and is parallel and perpendicular to the line 2x+7y=14
Darina [25.2K]

Answer: Parallel: y=-2/7x-2 1/7 Perpendicular: y=7/2x+13

Step-by-step explanation:

2x+7y=14

Subtract 2x from both sides.

7y=-2x+14

Divide both sides by 7 to isolate y.

y=-2/7x+2

Parallel:

Plug in x and y with same slope as the original.

-1=-2/7(-4)+b

Solve for b:

-1=8/7+b

-2 1/7=b

y=-2/7x-2 1/7

Perpendicular:

Plug in x and y with the negative inverse of the original slope.

-1=7/2(-4)+b

Solve for b.

-1=-28/2+b

-1=-14+b

13=b

y=7/2x+13

3 0
3 years ago
Simply 7/4 squared ​
klemol [59]

Answer:

0.4375

Step-by-step explanation:

5 0
3 years ago
Read 2 more answers
Reflect the point (a) a-axis, and (b) in the y-axis (-4,-1)
ivann1987 [24]

Answer:

(-4,-1) --------> (-4,1)

Step-by-step explanation:

P(x,y) -----------> P' (x, -y)

y-axis

4 0
3 years ago
Given the function f(x) = 6x^2 −13, what is f(-3)?
Naya [18.7K]
<h3>Answer: 41</h3>

Work Shown:

f(x) = 6x^2 - 13

f(x) = 6(x)^2 - 13

f(-3) = 6(-3)^2 - 13 ... replace every x with -3; use PEMDAS to simplify

f(-3) = 6(9) - 13

f(-3) = 54 - 13

f(-3) = 41

7 0
3 years ago
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