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lara [203]
3 years ago
11

Fifteen more than half a number is 9

Mathematics
2 answers:
Vika [28.1K]3 years ago
4 0
15 > x = 9 I'm pretty sure
Mars2501 [29]3 years ago
3 0
X(1/2)+15=9
x=-12
to get the answer subtract 15 from 9 then divided it by 1/2
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What is the sum of the three solutions? (find the values for x, y, and z, then add the answers)
dimulka [17.4K]
Answer: x + y + z = 4
-1 + 2 + 3 = 4

Explanation:

2x + 3y - z = 5 (1)
x - 3y + 2z= -6 (2)
3x + y - 4z = -8 (3)
————————-
2x + 3y - z = 5 (Add (1) and (2)
X - 3y + 2z = -6
————————
3x + z = -1 (4)

3x + y - 4z = -8 Add (3) and (2)
x - 3y + 2z = -6
————————
3(3x + y - 4z = -8)
x - 3y + 2z = -6
—————————
9x + 3y - 12z = -24
x -3y + 2z = -6
—————————-
10x - 10z = -30
x - z = -3 (5)

Add (4) and (5)

3x - z = -1
x - z = -3
—————
4x = -4
x = -1

Plug x = -1 in (5)
x - z = -3
-1 - z = -3
-z = -2
z = 2

Plug x and z in (2):
x - 3y + 2z = -6
-1 - 3y + 2(2) = -6
-1 - 3y + 4 = -6
-3y + 3 = -6
-3y = -9
y = -9/-3
y = 3

Therefore, y + z + x = 3 + 2 -1 = 4
7 0
3 years ago
Read 2 more answers
Find the area of the rhombus.<br> 7.5 yd<br> 13 yd<br> 13 yd<br> 7.5 yd<br> [ ? ] yd2
Doss [256]

Answer:

195

Step-by-step explanation:

4 0
3 years ago
Virenas Scout troop is trying to raise at least $650 this spring. How many boxes of cookies must they sell at $4.50 per box in o
melamori03 [73]

Answer:

145

Step-by-step explanation:

To find the number of boxes to reach the goal, divide the goal amount by the box amount:

650  \div 4.50  \approx144.444444

Since you can't sell .444444 of a box, you must sell 145 boxes.

7 0
3 years ago
CAN SOMEONE HELP ME PLEASE ASAP!?
kari74 [83]

Answer:

5083662.2 ft³

Step-by-step explanation:

See picture for formula for V.

r = 46

h = 65

You can either convert the meters to ft beforehand:

65m * 3.2808 ft/m = 213.252 ft

46m * 3.2808 ft/m = 150.9168 ft

Or calculate in meters and multiply by 3.2808³ afterwards.

3 0
3 years ago
If you sleep 33% in a day, how many hours is that?
strojnjashka [21]
We know that
one day is equal to 24 hrs
so
33 % of the day is equal to
(\frac{33}{100} )*24 \\ =7.92 hrs

the answer is
7.92 hrs
5 0
3 years ago
Read 2 more answers
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