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2 years ago

The product of a number and 9, increased by 4, is 58. Find the number

Mathematics

2 answers:

ella [17]2 years ago

8 0

Answer:

first do 58-4 which is 54 then do 54/ 9 which is 6 so the number is 6

Lady_Fox [76]2 years ago

4 0

Answer:

Step-by-step explanation:

58 - 4 = 54

54/9 = 6 (because 9 x ? = 54)

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The circumference of a circle is 60π cm. What is the radius of the circle

Sindrei [870]

Answer:

15 cm

Step-by-step explanation:

Circumference of circle= 2πr, where r us the radius of the circle.

Given that the circumference of circle is 60πcm,

60π= 2πr

Divide by 2 on both sides,

15π= πr

Divide by π on both sides,

15= r

Thus, radius of circle= 15cm.

8 0

3 years ago

How Do You Write The Expression For Triple 9 Then Multiply 8

Kitty [74]

9^3 x 8 is the answer I believe

8 0

3 years ago

Which line has a constant proportionality of 4

Ne4ueva [31]

Answer:

Line A

Step-by-step explanation:

Line A has a constant of proportionality (slope) of 4.

3 0

2 years ago

If the radius of a coin is 20cm ,find its surface area.

jasenka [17]

Answer:

It's surface area is 1257.14cm^2

Step-by-step explanation:

area=22/7×20cm×20cm

=3.14×20cm×20cm

=1257.14cm^2

4 0

3 years ago

Jay wants to make a box, with no lid (or top), out of a 10" x 6" rectangular piece of cardboard. If Jay cuts squares with dimens

LiRa [457]

Answer:

a. $V(x)=x(10-2x)(6-2x)$

b. $S(x)=4(15-x^2)$

Step-by-step explanation:

Dimensions of rectangular piece of cardboard= $10\times 6$

According to question

Length of box,l=10-2x

Breadth of box,b=6-2x

Height of box,h=x

Volume of box= $l\times b\times h$

Substitute the values in the formula

Volume of box= $x(10-2x)(6-2x)$

$V(x)=x(10-2x)(6-2x)$

b.Surface area of box= $2(b+l)h+lb$

Because the box has no lid

Substitute the values in the formula

Surface area of box= $2(10-2x+6-2x)x+(10-2x)(6-2x)$

Surface area of box= $2(16-4x)x+60-20x-12x+4x^2$

Surface area of box= $32x-8x^2+60-32x+4x^2$

Surface area of box= $60-4x^2=4(15-x^2)$

Surface area of box, S(x)= $4(15-x^2)$

4 0

3 years ago