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notsponge [240]

3 years ago

12

A collection of coins consists of dimes and nickels .The number of dimes is two more than the twice the number of nickels.The va

lue of the collection is $2.70. How many dimes are in the collection ?

1 answer:

CaHeK987 [17]3 years ago

7 0

27 dimes for my answer

hope it works

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If x^(2) = 64 and y^(2)= 121 what is the value of x-y?

GalinKa [24]

Step-by-step explanation:

<em>the value of x is 8</em>

8^(2) = 64

the value of y is 11

11^(2) = 121

x - y

= 8 - 11

= -3

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3 0

3 years ago

tankabanditka [31]

The function is continuous

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4 years ago

The lengths of the diagonals of a rhombus are 2x and 10x. What expression gives the perimeter of the rhombus?

True [87]

Answer:

$P=4x\sqrt{26}\ units$

Step-by-step explanation:

we know that

The sides of a rhombus are all congruent and the diagonals are perpendicular bisectors of each other

so

Applying the Pythagorean Theorem

$c^2=a^2+b^2$

where

c is the length side of the rhombus

a and b are the semi-diagonals

we have

$a=2x/2=x\ units\\b=10x/2=5x\ units$

substitute the values

$c^2=x^2+(5x)^2$

$c^2=26x^2$

$c=x\sqrt{26}\ units$

To find out the perimeter of the rhombus multiply the length side by 4

$P=(4)(x\sqrt{26})$

$P=4x\sqrt{26}\ units$

6 0

4 years ago

34=2x+8(x+3)<br><br><br> Help me solve please?

sveta [45]

34 = 2x +8x + 8(3)
34 = 2x + 8x + 24
34 = 10x + 24
10 = 10x

<em><u>x = 1</u></em>

6 0

3 years ago

Find the value of n that makes each equation true. Then, arrange the equations IN increasing ORDER of the values of n found.

andreyandreev [35.5K]

n+5=13 n=8

n+5=10 n=5

2n=3 n=1.5

5n=20 n=4

6 0

3 years ago