The mean of a set of numbers is the sum divided by the number of terms.
Answer: 22.9
Answer:
Its a straight line
Step-by-step explanation:
<-------------------------->
<span>-3x - 7 = -6x + 2
+7 +7
---------------------------------------------------------------------------------------------------------------------
-3x = -6x+9
+6x +6x
</span>---------------------------------------------------------------------------------------------------------------------<span>
3x = 9
x = 3
</span>
Answer:
<h3>Q 1</h3>
U and S are congruent and sum of 4 angles is 360.
- 130 + 2*80 + m∠T = 360
- m∠T = 360 - 290
- m∠T = 70
Correct choice is B
<h3>Q 2</h3>
∠1 and ∠3 are complementary, AC is angle bisector and ∠2 is right angle since diagonals of a kite are perpendicular
- ∠DAC≅∠BAC
- m∠1 = 39°
- m∠3 = 90° - 39° = 51°
Correct choice is C
<h3>Q 14</h3>
- A- guaranteed
- B- guaranteed
- C- guaranteed
- D- not guaranteed as it could be a rhombus
Step-by-step explanation:
what's the question ? it does not say.
I assume it is "how many packages of what size were sold ?"
x = number of small packages
y = number of medium packages sold
z = number of large packages sold
x + y + z = 9
7x + 12y + 15z = 86
y = 3z
these are the 3 equations we get out of the question.
we put the third equation into the other two :
x + 3z + z = x + 4z = 9
7x + 12×3z + 15z = 7x + 36z + 15z = 7x + 51z = 86
it of this first equation we get
x = -4z + 9
and putting that into the other equation :
7×(-4z + 9) + 51z = 86
-28z + 63 + 51z = 86
23z = 23
z = 1
y = 3z = 3×1 = 3
x = -4z + 9 = -4×1 + 9 = -4 + 9 = 5
so, 5 small, 3 medium and 1 large packages were sold.