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Charra [1.4K]
2 years ago
6

class="latex-formula">




Free
Mathematics
2 answers:
sergij07 [2.7K]2 years ago
5 0

\sf \longmapsto \: 2x  +  21 = 3

\sf \longmapsto2x = 3 - 21

\sf \longmapsto2x =  - 18

\sf \longmapsto \: x =  \frac{ - 18}{2}

\sf \longmapsto x =  - 9

grigory [225]2 years ago
3 0

Answer:

\sf 2x+21=3

\sf 2x+21-21=3-21

\sf 2x=-18

\sf \cfrac{2x}{2}=\cfrac{-18}{2}

\boxed{\sf x=-9}

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Read the numbers and decide what the next number should be. 256 196 144 100 64 36 16
Tatiana [17]
340? TBD add the two numbers.
4 0
3 years ago
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Solve the equation. Check your solutions.<br> |4b+4|=|2b+8|
anzhelika [568]

Answer:

<h2><u>b = 2 or b = -2</u></h2>

Explanation:

|4b + 4| = |2b + 8|

<em>Solve absolute value</em>

|4b + 4| = |2b + 8|

Either 4b + 4 = 2b + 8 or 4b + 4 = −(2b + 8)

4b + 4 = 2b + 8 <em>(Possibility 1)</em>

4b + 4 − 2b = 2b + 8 − 2b <em>(Subtract 2b from both sides)</em>

2b + 4 = 8

2b + 4 − 4 = 8 − 4 <em>(Subtract 4 from both sides)</em>

2b = 4

2b / 2 = 4 / 2 <em>(Divide both sides by 2)</em>

b = 2

4b + 4 = −(2b + 8) <em>(Possibility 2)</em>

4b + 4 = −2b − 8 <em>(Simplify both sides of the equation)</em>

4b + 4 + 2b = −2b − 8 + 2b <em>(Add 2b to both sides)</em>

6b + 4 = −8

6b + 4 − 4 = −8 − 4 <em>(Subtract 4 from both sides)</em>

6b = −12

6b / 6 = -12 / 6 <em>(Divide both sides by 6)</em>

b = -2

<h2><u>b = 2 or b = -2</u></h2>
6 0
2 years ago
Can somebody help me with this
Lera25 [3.4K]

Answer:

A

Step-by-step explanation:

It’s just like adding except with a variable so 5x+3x is like 5+3 except with x so 8x+3=16

5 0
3 years ago
Read 2 more answers
IT IS DUE AT 11:59PM. PLEASE HELP!!!!
kaheart [24]

Hello from MrBillDoesMath!

Answer:   b = 4, h = 13

Discussion:

For a triangle with base b" and height "h, the area formula is

A=  (1/2)bh.

In our case A = 26, h = 5b-7, so

26 = (1/2) b (5b-7).  Multiply both sides by 2:

26*2 = b(5b-7) =>

52 = b(5b-7)  =>

52 = 5b^2 - 7b =>           (subtract 52 from both sides)

5b^2 - 7b - 52 = 0.   This factors as follows:

(b - 4) (5 b + 13) = 0        (use quadratic formula to find this)

so b = 4 and h = 5b -7 = 5*4 - 7 = 13


Thank you,

MrB


3 0
2 years ago
Read 2 more answers
What is 10 more than 451
TEA [102]
10 more than 451 would be 451 + 10 = 461.


6 0
3 years ago
Read 2 more answers
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