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2 years ago

| -1 - 3| = ? asking for a friend

Mathematics

1 answer:

xz_007 [3.2K]2 years ago

8 0

Answer:

Step-by-step explanation:

first you simplify, so -1-3=-4.

|-4|

the absolute value of negative four is just four with all signs removed (in this case, negative sign)

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A boundary stripe 6 in. wide is painted around a rectangle whose dimensions are 120 ft by 230 ft. Use differentials to approxima

Nimfa-mama [501]

Answer:

350 square feet

Step-by-step explanation:

We are given that

Width of strip=6 in

Dimension of rectangle= $20 ft\times 230 ft$

We know that

Area of rectangle ,A=xy

Differentiate

$dA=\frac{\partial A}{\partial x}x+\frac{\partial A}{\partial y}y$

We have $\frac{\partial A}{\partial x}=y=230 ft$

$\frac{\partial A}{\partial y}=x=120$

$dx=\frac{12}{12}=1 ft$

1 ft=12 in

Because 6 in added in both side of breadth

dy= $\frac{12}{12}=1 ft$

Because 6 in added on both sides of length of rectangle

Substitute the values

$dA=230\times 1+120\times 1=350 ft^2$

Hence, the number of square feet of paint in the strip=350 square feet

7 0

3 years ago

What is the answer to 71m= Cm

Veseljchak [2.6K]

180 cm. it is that answer because ...

K H D U D C M

71 m times 100 is 180

8 0

2 years ago

Read 2 more answers

-3x + 2y = 21<br> -4x + y = 23

Nady [450]

Answer:

2y = 3x + 21

y = 1.5x + 10.5

plug in, in the second equation

- 4x + (1.5x + 10.5) = 23

-4x + 1.5x + 10.5 = 23

-2.5x + 10.5 = 23

-2.5x = 12.5

x = 12.5/-2.5 = -5

y = 1.5 (-5) + 10.5 = 3

x = -5

y = 3

5 0

3 years ago

Read 2 more answers

Please help quickly if possible

lora16 [44]

Answer:

$36

Step-by-step explanation:

8a+5c

8(2)+5(4)

16 + 20

4 0

2 years ago

Read 2 more answers

The area of the isosceles triangle is 80 square centimeters. Use the equation 1/2(8h) =80 to find the height of the triangle.

Dmitry [639]

Answer:

20cm

Step-by-step explanation:

Given data

Area= 80cm^2

we know that the expression for the area of a triangle is

A= 1/2B*H

from the given expression 1/2(8h) =80 the base is 8cm

let us substitute to find the height h

1/2(8h) =80

4h=80

h= 80/4

h= 20cm

Hence the heigth h is 20cm

6 0

2 years ago