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Kazeer [188]
4 years ago
6

What is the value of x in the equation 5(4x-10)+10x=4(2x-3)+2(x-4) ?

Mathematics
2 answers:
MrRissso [65]4 years ago
6 0
5(4x - 10) + 10x = 4(2x - 3) + 2(x - 4)
20x - 50 + 10x = 8x - 12 + 2x - 8
30x - 50 = 10x - 20
30x - 10x = -20 + 50
20x = 30
x = 3/2 <==
PilotLPTM [1.2K]4 years ago
3 0

Answer:

\frac{3}{2}

Step-by-step explanation:

Here, the given expression is,

5(4x-10)+10x=4(2x-3)+2(x-4)

By distributive property,

20x - 50 + 10x = 8x - 12 + 2x - 8

By combining like terms,

30x -50=10x-20

Adding 50 on both sides,

30x=10x-20+50

30x = 10x + 30

Subtracting 10x on both sides,

20x = 30

Divide both sides by 20,.

x=\frac{3}{2}

Hence, LAST option is correct.

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bija089 [108]
D 39.25 which isn't far from 40

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3 years ago
Index notation simplify 4^9 x 4^3
LenKa [72]

Answer:

4^{12}

Step-by-step explanation:

Using the rule of exponents

a^{m} × a^{n} = a^{(m+n)} , then

4^{9} × 4^{3} = 4^{(9+3)} = 4^{12}

7 0
3 years ago
Laura has 160 pounds of green beans at her vegetable stand. If she sells 10 pounds of green beans every hour, what is the percen
Mademuasel [1]

Given:

Laura has 160 pounds of green beans at her vegetable stand.

She sells 10 pounds of green beans every hour.

To find:

The percent decrease in green beans after 3 hours.

Solution:

We have,

Beans sold in 1 hour = 10 pounds

So, Beans sold in 3 hours = 30 pounds

Decrease in green beans after 3 hours is 30 pounds.

Now,

\%\text{Decrease}=\dfrac{\text{Decrease in green beans after 3 hours }}{\text{Initial amount of green beans}}\times 100

\%\text{Decrease in green beans after 3 hours}=\dfrac{30}{160}\times 100

\%\text{Decrease in green beans after 3 hours}=\dfrac{300}{16}

\%\text{Decrease in green beans after 3 hours}=18.75\%

Therefore, the correct option is A.

7 0
3 years ago
If you travel 70000 M at a rate of 25 m/s and , how long does it take to complete the trip?
ivolga24 [154]

Answer:

Time=2800 seconds.

Time in minutes= 46.67 minutes

Time in hours= 0.778 hours

Step-by-step explanation:

Distance traveled= 70000 m

Rate or speed of travel= 25m/s

To calculate the time for the travel, we multiply the rate of travel by the distance covered or traveled.

Rate= distance/time

Time= distance/rate

Time= 70000/25

Time=2800 seconds.

Time in minutes= 2800/60

Time in minutes= 46.67 minutes

Time in hours = 2800/(60*60)

Time in hours= 2800/360

Time in hours= 0.778 hours

8 0
3 years ago
Steve connected a wire extension that is 3/8 foot long to another wire that is 1/2 foot long. How long is the wire with the exte
hammer [34]

Answer:

<u>7/8 feet</u>

Step-by-step explanation:

In order to add two frctions you need to make their denominator the same,

3/8 can be kept as it is and we can multiply the top and bottom of 1/2 by 4 in order to ger 4/8. Now it is easier to add together,

3/8 + 4/8= <u>7/8</u>

6 0
3 years ago
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