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Tema [17]
3 years ago
7

Solve for x -4x+6(6-2x)=-7-36 A) 8 B) 15 C) -7 D) 3

Mathematics
1 answer:
wlad13 [49]3 years ago
7 0

Answer:

D) 3 would be the answer

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A cubic inch of PVC material weight 0.063 pounds per cubic inch. What’s the weight of a 36 inch piece of PVC pipe with an outsid
artcher [175]

Answer:

Option B. 0.783 pounds

Step-by-step explanation:

step 1

Find the area of a a 36 inch piece of PVC pipe with an outside diameter of 0.82 inches and an inside diameter of 0.75 inches

The area of a circle is equal to

A=\pi r^{2}

we have

r2=0.82\ in

r1=0.75\ in

assume

\pi =3.14

A=\pi (r2^2-r1^2)

substitute the values

A=(3.14)(0.82^2-0.75^2)

A=0.345086\ in^2

step 2

Find the volume of the piece of PVC

Multiply the area by its length

V=0.345086(36)=12.42\ in^3

step 3

Find the weight of the piece of PVC

Multiply the volume by its density

The density is 0.063\frac{lb}{in^3}

so

W=12.42(0.063)=0.783\ lb

4 0
4 years ago
One tank holds 350 gallons another tank holds 700 what's the average of both tanks
Ostrovityanka [42]
(350 + 700) / 2 = 1050/2 = 525...the average of both tanks is 525 gallons
5 0
3 years ago
Read 2 more answers
What could you do to the equation 100x + 300 = 500 to change it into x + 3 = 5?
VashaNatasha [74]

Answer:

2+3=5

Step-by-step explanation:

100x + 300 = 500

100x = 500 - 300

100× = 200

100x/100 = 200/100

therefore ^x = 2

x + 3 = 5

2 + 3 = 5

5 0
3 years ago
What is a group of objects that share common characteristics and are well-defined?​
svetoff [14.1K]

Answer:

The options as included in the attachment section are:

A. real numbers B.Cardinality C.element D.Set

The answer is D. Set

Step-by-step explanation:

In mathematics, a set is a group of well-defined objects that share common characteristics as rightly stated in this question. So in a mathematical calculation, the elements or objects collected as a group is called SET. The types of set include empty set, finite set, infinite set, universal set etc.

- Since set represents the whole collection or group, each object, which can be number, letter etc. in the group is an ELEMENT. Likewise, the cardinality of a set refers to the number of elements contained in a particular set.

3 0
3 years ago
Simplify this 13.) 13y² + 9y + 4y² - 31y
erastova [34]

Answer: 17y^2-22y

Step-by-step explanation:

13y^2+9y+4y^2-31y

\mathrm{Group\:like\:terms}

=13y^2+4y^2+9y-31y

\mathrm{Add\:similar\:elements:}\:13y^2+4y^2=17y^2

=17y^2+9y-31y

\mathrm{Add\:similar\:elements:}\:9y-31y=-22y

=17y^2-22y

3 0
3 years ago
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