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Alex Ar [27]
3 years ago
13

What is the value of x?

Mathematics
2 answers:
Gekata [30.6K]3 years ago
4 0
4x-20+3x+14=155
4x+3x+14=175
7x+14=175
7x=161
x=161/7
x=23
Hitman42 [59]3 years ago
3 0

Answer:

Step-by-step explanation:

Since RQT=155

4x-20+3x+14=155

7x-6=155

7x=161

x=23

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Annie has a lemonade stand and her mom pays her 5 dollars every week for her to go get her supplies. Her dad pays her ten dollars one week. She has 35 dollars that month. How many weeks did Annie’s mom pay her?

35 - 10 = 25

25 divided by 5 equals 5.

To check: 5 x 5 equals 25 plus 10 equals 35
6 0
3 years ago
29. The mean value of land and buildings per acre from a sample of farms is $1500, with a standard deviation of $200. The data s
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Answer: 68.27%

Step-by-step explanation:

Given : Mean value of land and buildings per acre from a sample of farms :

\mu=\$1500

\sigma= \$200

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Using z=\dfrac{x-\mu}{\sigma} , for x= 1300 , we have

z=\dfrac{1300-1500}{200}=-1

For x= 1700 , z=\dfrac{1700-1500}{200}=1

Using standard normal z-value table,

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3 0
3 years ago
Help on this problem
GREYUIT [131]
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Hope this helps :)
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3 years ago
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Anna11 [10]

Answer:

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Step-by-step explanation:

To find f(x + 1), substitute x = x + 1 into f(x), that is

f(x + 1) = 3(x + 1)² - (x + 1) + 5 ← expand (x + 1)² using FOIL

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8 0
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marta [7]

Answer:

perpendicular

Step-by-step explanation:

They form a 90 degree angle

5 0
3 years ago
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