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topjm [15]
3 years ago
11

If 7 + 3x = 22, then 2x =

Mathematics
1 answer:
ELEN [110]3 years ago
4 0
7+3x=22\ \ \ /-7\\3x=15\ \ \ /:3\\x=5\\\\\\2x=2\cdot5=10
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a shipping company charges x dollars to ship a package that weighs up to 1 pound and an additional fee based on the additional w
stepan [7]

Let the additional fee , the shipping company charges be $y .

So for 0.75 pounds, since the weight is less then 1 pound, company charge = $2x

For 3 packages with weigh 2.5 pounds, company charge 3* ( x+(2.5-1)*y )

= 3x+4.5y

For package with weighs 4.2 pounds, company charge x+(4.2-1)y = x+3.1y

So the total amount , company charge = 2x +3x +4.5y +x+3.1y

=6x +7.6y

3 0
3 years ago
Simplify the expression to a polynomial in standard form:<br> a<br> (-x^2-2x-2)(x^2+x-3)
antiseptic1488 [7]
Answer: -x^4 - 3x^3 - x^2 + 4x + 6

Explanation
7 0
3 years ago
(5a + a2 - 14) (10a + a2 + 39)
yan [13]
15a+a4+25 is the answer
8 0
3 years ago
At the end of the day of teaching the skill of cutting and sewing to make capes, Ms. Ironperson and Mr. Thoro decided to go to t
olga_2 [115]

Answer:

The cost of a chicken shawarma wrap = $10.99

The cost of an order of spiced potatoes=$4.99

Equations needed

3x+2y =42.95

5x + 4y=74.91

Step-by-step explanation:

x = the cost of a chicken shawarma wrap

y = the cost of an order of spiced potatoes

Ms. Ironperson

3x+2y =42.95

Mr. Thoro

5x + 4y=74.91

3x+2y =42.95 (1)

5x + 4y=74.91 (2)

Multiply (1) by 2

6x + 4y=85.9 (3)

5x + 4y=74.91. (2)

Subtract (2) from (3)

6x - 5x= 85.9 - 74.91

x=$10.99

Substitute the value of x into (1)

3x+2y =42.95 (1)

3(10.99) + 2y =42.95

32.97 + 2y = 42.95

2y = 42.95 - 32.97

2y=9.98

Divide both sides by 2

y=9.98/2

=4.99

y=$4.99

Therefore,

The cost of a chicken shawarma wrap = $10.99

The cost of an order of spiced potatoes=$4.99

3 0
3 years ago
Help me with this please
lutik1710 [3]
<h3>Answer:</h3>

4.42×10^34 molecules/min

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

Multiply the various factors, along with the unit conversion (60 s/min).

... (3.35×10^25 molecules/L) × (2.2×10^7 L/s) × (60 s/min)

... = (3.35×2.2×60)×10^(25+7) molecules/min

... = 442.2×10^32 molecules/min

... ≈ 4.42×10^34 molecules/min

_____

<em>Comment on scientific notation problems</em>

Your scientific or graphing calculator will allow you to enter and display numbers in scientific notation.

7 0
3 years ago
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