All categories

2 years ago

Eighty, decreased by three times a

Mathematics

1 answer:

Marina86 [1]2 years ago

6 0

Answer:

The number is 9.

Step-by-step explanation:

Lets write this as an equation first. We'll substitute the number for the variable <em>x</em>.

80 - 3x = 5x + 8

First, let's add 3x to both sides.

80 - 3x + 3x = 5x + 3x + 8

80 = 8x + 8

Next, let's subtract 8 from both sides.

80 - 8 = 8x + 8 - 8

72 = 8x

Finally, let's divide both sides by 8.

72/8 = 8x/8

9 = x

<em>So the secret number is 9.</em>

P.S.

This is my first answer to a Brainly question so please don't complain!

You might be interested in

Janae' is buying food for a party. She is buying a cheese tray for $4.50 and a few pounds of fruit for

bogdanovich [222]

Answer:

0.67

Step-by-step explanation:

5 0

3 years ago

Rachel frank and Austin sent a total of 68 text messages during the weekend Rachel sent 7 fewer messages than Austin frank sent

elena-14-01-66 [18.8K]

Answer:I think 183

Step-by-step explanation:

3 0

3 years ago

What is the discriminant of 9x^2+=10x

prisoha [69]

9x^2-10x=0
D= b^2-4ac
b=-10
a=9
c=0
D=(-10)^2-4*9*0=10^2-0=100

4 0

3 years ago

Given the two chemical equations, circle the one that is balanced.

max2010maxim [7]

B is correct hope this helps

3 0

2 years ago

Which piece of additional information can be used to prove △CEA ~ △CDB?

8_murik_8 [283]

<h3>Answer:</h3>

∠BDC and ∠AED are right angles

<h3>Step-by-step explanation:</h3>

Because ∠C ≅ ∠C, the additional bit of information above can be used to show AA similarity.

____

None of the other offered choices says anything about <em>both</em> triangles. In order to show similarity, you need information about corresponding parts of the <em>two</em> triangles. Information about one triangle alone is not sufficient.

5 0

2 years ago