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SashulF [63]
2 years ago
14

Solve the following 2(x+3)=x-4

Mathematics
2 answers:
solmaris [256]2 years ago
7 0

Answer:

x=5

Step-by-step explanation:

2(x+3)=x-4

distribute:

2x+6=x-4

+2x   +2x

6=2x-4

+4       +4

10=2x

/2    /2

x = 5

(edit: actually subtract x and then subtract 6. finally divide)

x = -10

Anna35 [415]2 years ago
7 0
Is x=5.......................
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The weights (to the nearest pound) of some boxes to be shipped are found to be:. Weight 65 68 69 70 71 72 90 95 frequency 1 2 5
Lena [83]
So the mean is 72.97

We need to subtract the mean from each value and square it.
(65-72.97)^2= 63.5209
(68-72.97)^2=24.7009
(69-72.97)^2=15.7609
(70-72.97)^2=8.8209
(71-72.97)^2= 3.8809
(72-72.97)^2=0.9409
(90-72.97)^2=290.0209
(95-72.97)^2=485.3209

Now we add up the new values ( also consider their frequency) and find their mean.
Add the values
63.5209+(2 •24.7009=49.4018)+(5•15.7609=78.8045)+(8•8.8209=70.5672)+(7•3.8809=27.1663)+(3•0.9409=2.8227)+(2•290.0209=580.0418)+(2•485.3209=970.6418)= 1,842.967
Divide by total numburs to find the mean
1,842.967/ 30=61.43223333

The standar deviation is the square root of the mean so is
Square root of 61.43223333=7.837871735
Round to the nearest tenth
Standard Deviation is 7.8



7 0
3 years ago
ben drives from a 36- foot platform. The equation h= -16t^2+14t+36 models the dive. How long will it take Ben to reach the water
Valentin [98]
So you want to plug in the height for h and solve for t

36 = -16t^2+14t+36
So you get 14/16 which simplifies to
7/8 seconds

Hope this helped!
6 0
3 years ago
You know the length and width of a scale model. what additional information do you need to find the scale of the model?
DENIUS [597]
What the model is scaled by
5 0
3 years ago
¿cual es el 5% de 320?
Bezzdna [24]

Answer:

16

Step-by-step explanation:

5 × 320  ÷ 100 = 16

5 × 320 = 1,600

1,600 ÷ 100 = 16

16 es tu repuesta

4 0
2 years ago
Read 2 more answers
For each give the correct METRIC unit of measure. Do NOT use the abbreviation. a. My foot is 21 (fill in blanks) long. b. My lar
Nataly [62]

Answer:

Inches

Gallons

Kilometers

Yards

Step-by-step explanation:

We are to proffer the appropriate unit of measurement for each scenario given below :

a. My foot is 21 inches long. (unit for measuring length which are usually small such a a person's foot)

b. My large aquarium holds 55 gallons of water. (volume measurement of liquid in a large container)

c. My dad drives 27 kilometers to work each day. (distance measurement which are moderately long)

d. I just bought 12 yards of carpet to cover my family room floor. (length measurement used for materials such as cloth, carpet, rugs e.t.c).

7 0
3 years ago
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