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kenny6666 [7]
3 years ago
10

Select all the equations where r 3 is a solution.​

Mathematics
2 answers:
White raven [17]3 years ago
7 0

Answer:

x-3 =0

6=2x

x^2 = 9

Step-by-step explanation:

substitute the values, and you will get the answer!

have a great day!!

lozanna [386]3 years ago
6 0

Answer:

The right answers are 1,4 and 6

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There are nine water bottles in a fridge. Three full boxes are added. Two more boxes are added, both of which have one fewer bot
Degger [83]

The number of bottles in a full box is 12.

<u><em>Explanation</em></u>

Suppose, the number of bottles in a full box is  x

So, the number of bottles in <u>three</u> full boxes =3x

Now, two more boxes are added, both of which have <u>one fewer bottle than the other three</u>. So, the number of bottles in these two boxes = 2(x-1)

As there were 9 bottles initially and now there are 67 bottles in the fridge, <em><u>so the equation will be</u></em>....

9+3x+2(x-1)=67\\ \\ 9+3x+2x-2=67\\ \\ 5x+7=67\\ \\ 5x=67-7\\ \\ 5x=60\\ \\ x=\frac{60}{5}=12

Thus, the number of bottles in a full box is 12.

7 0
3 years ago
I need help answering this question
My name is Ann [436]

Answer:

55

Step-by-step explanation:

JL = JK + KL

84 = 3x+5  + 6x+7

Combine like terms

84 = 9x +12

Subtract 12 from each side

84-12 = 9x+12-12

72 = 9x

Divide by 9

72/9 = 9x/9

8 =x

We want KL

KL = 6x+7

   6*8 +7

    48+7

     55

4 0
3 years ago
What is the surface area of the rectangular pyramid
posledela

Answer:

<h2>41.74 m²</h2>

Step-by-step explanation:

We have:

rectangle 4.8 m × 3.8 m

two triangles with base b = 4.8 m and height h = 2.6 m

two triangle with base b = 3.8 m and height h = 2.9 m.

The formula of an area of a rectangle l × w:

A = lw

Substitute:

A_1 = (4.8)(3.8) = 18.24\ m^2

The formula of an area of a triangle:

A=\dfrac{bh}{2}

Substitute:

A_2=\dfrac{(4.8)(2.6)}{2}=6.24\ m^2\\\\A_3=\dfrac{(3.8)(2.9)}{2}=5.51\ m^2

The Surface Area:

S.A.=A_1+2A_2+2A_3\\\\S.A.=18.24+2(6.24)+2(5.51)=41.74\ m^2

3 0
3 years ago
Isolate the variable to solve 4x + 4 &gt; –20. Which number line shows the solution set?
sdas [7]

Answer:

the solution to this inequality is: (-6,∞).

Step-by-step explanation:

<em> " Isolating the variable means rewriting an equivalent equation in which the variable is on one side of the equation and everything else is on the other side of the equation ".</em>

<em>Here we are given an inequality as:</em>

<em> 4x + 4 > –20</em>

<em>so subtracting both side by 4 we have:</em>

4x>-20-4

4x>-24

x>-6 (dividing both side by 4)

Hence we get the solution on the number line as:

all those real number which are strictly greater than -6; In intervals we can write this as:

(-6,∞).

3 0
3 years ago
Read 2 more answers
Six people are standing in line for concert tickets. Their average age is 27. the average age of the first four people in line i
Vanyuwa [196]
Total age 
<span>6 * 27 </span>
<span>162 </span>

<span>Subtotal age of first 4 </span>
<span>4 * 23 </span>
<span>92 </span>

<span>Subtotal of last 3 </span>
<span>3 * 34 </span>
<span>102 </span>

<span>In the total of the first 4 and last 3 </span>
<span>the 4th person has been counted twice. </span>
<span>This second time must be subtracted. </span>

<span>Therefor </span>
<span>92 + 102 - x = 162 </span>
<span>194 - x = 162 </span>

<span>Subtract 194 from both sides </span>
<span>-x = -32 </span>

<span>Multiply both sides by -1 </span>
<span>x = 32 

Thank you for posting your question here at brainly. I hope the answer will help you. Feel free to ask more questions here.
</span>
6 0
3 years ago
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