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noname [10]
3 years ago
10

Is x = 7 a solution to the equation 3x = 21? yes no WHICH ONE??

Mathematics
2 answers:
cricket20 [7]3 years ago
5 0

Answer:

Yes

Step-by-step explanation:

because when you plug in 7 it equals 21, so x=7 is a solution

Veronika [31]3 years ago
4 0

Answer:

yes.

Step-by-step explanation:

if you plug 7 into x it'll be 3x7 and that will equal 21

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A tent that initially sold for $68.00 is on sale for 21% off. What is the sale price of the tent?
quester [9]

Answer:

Hey!

Try this!

   Take the original price.

   Divide the original price by 5.

   Alternatively, divide the original price by 100 and multiply it by 20.

   Subtract this new number from the original one.

   The number you calculated is the discounted value.

   Enjoy your savings!

7 0
3 years ago
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Please find the answer and explain how you found it
Zigmanuir [339]
The answer is D I made a video incase you can’t see the picture well.
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8 0
3 years ago
2(y+1) for y =2 (will pick brainliest if right)<br> A:6 <br> B:5 <br> C:7<br> D:8
Katen [24]

Answer:

A. 6

Step-by-step explanation:

pretty sure its right

5 0
3 years ago
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Solve 4(x + 2) = 20
KiRa [710]

Answer:

x = 3

Explanation:

\sf 4(x + 2) = 20

\sf 4x + 8 = 20

\sf 4x = 20 - 8

\sf 4x = 12

\sf x = \frac{12}{4}

\sf x = 3

check:

4(x + 2) = 20

4(3 + 2) = 20

4(5) = 20

20 = 20

Hence proved x = 3

4 0
2 years ago
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What is the perimeter of the triangle shown on the coordinate plane, to the nearest tenth of a unit?
Karo-lina-s [1.5K]

Let us find the co ordinates of each vertex of the triangle .

Vertex A ( in firs second quadrant) = ( -5 ,3)

vertex B in third quadrant = ( -5, -5)

vertex C in fourth quadrant = ( 4, -2)

let us use distance formula AB^2 = ( -5 - 3)^2 + (-5 - -5 )^2 = 64 + 0

AB= 8

BC^2 = ( -2 - -5 )^2 + ( 4 - - 5)^2 = 9 + 81 = 90

BC = 9.48

AC^2 = ( -2 -3)^2 +( 4- -5)^2 = 25 + 81 = 106

AC= 10.29

Perimeter = sum of length of AB+ BC+ Ac = 8 + 10.29 + 9.48= 22.77

8 0
2 years ago
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