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Elena L [17]
4 years ago
7

5х + 3 = 43 What this??

Mathematics
2 answers:
Artist 52 [7]4 years ago
8 0

Answer:

answer is x = 8

Step-by-step explanation:

If it says add 3 you subtract it to the 43 and that turns into 40, divide both sides by 5 and you get x = 8 :)

svp [43]4 years ago
8 0

Answer:

x=8

Step-by-step explanation:

Im not sure what your question means,but you need to find x.

5x+3=43

You subtract 3 on both sides

leaving your equation to be

5x=40

Now divide the 5

and you will get x=8

Check:

5(8)+3=43

40+3=43

43=43

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0.074n = 74
multiply both sides by 1000 to make the process simpler
74n = 74000
divide both sides by 74
n = 1000
3 0
4 years ago
Read 2 more answers
Match each quadratic equation with its solution set.
Marianna [84]

Answer:

( 8 , - 8)  => x² - 55 = 9

( 4 , - 4)  =>  2x² - 32 = 0

(5 , - 5) => 4x² - 100 = 0

(11 , - 11) => x² - 140 = -19

( 3, - 3) =>  2x² - 18 = 0

Step-by-step explanation:

1)

2x^2  - 32 = 0\\\\2(x^2 - 16 ) = 0 \\\\x^2 - 16 = 0 \\\\x^2 = 16 \\\\x = \sqrt {16 }  = \pm 4

x = ( 4 , - 4)

2)

4x^2 - 100 = 0 \\\\4(x^2 - 25 ) = 0\\\\x^2 - 25 = 0 \\\\x^2 = 25 \\\\x= \sqrt{25} = \pm 5

x = ( 5 , - 5 )

3)

x^2 - 55 = 9 \\\\x^2 = 9 +55\\\\x^2 = 64\\\\x = \sqrt{64} = \pm 8

x= ( 8 , - 8)

4)

x^2 - 140 = - 19\\\\x^2 = -19 + 140 \\\\x^2 = 121 \\\\x= \sqrt{121} = \pm 11

x = ( 11  , -11)

5)

2x^2 - 18 = 0\\\\2(x^2 - 9) = 0\\\\x^2- 9 = 0 \\\\x^2 = 9 \\\\x = \sqrt9 = \pm 3

x = ( 3 , - 3)

8 0
3 years ago
Read 2 more answers
The perimeter of rectangle is 48 cm. Find the sides of the rectangle if one of the sides is 12 cm longer than the other.
muminat

Answer:

Width is 4cm, length is 12 cm.

Step-by-step explanation:

Write the problem as an equation.

(x+12)*(x)=48

Where x is the length of the shorter side.

Solve.

(x^2)+12x=48

x=4

7 0
3 years ago
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1. Noah printed a map of a walking trail. The length of the trail is 12 cm.
Dmitry_Shevchenko [17]

Answer:

B: 24

(Sorry if this is wrong i tried my best)

6 0
3 years ago
A survey reported that 70% of those responding to a national survey of college freshmen were interested in taking summer courses
olya-2409 [2.1K]

Answer:

95% confidence interval: (0.5717,0.8283)          

Step-by-step explanation:

We are given the following in the question:

Sample size, n = 49

p = 70% = 0.7

Alpha, α = 0.05

The confidence interval can be calculated as:

p \pm z_{critical}\sqrt{\dfrac{p(1-p)}{n}}

Putting the values, we get,

z_{critical}\text{ at}~\alpha_{0.05} = 1.96

0.7 \pm 1.96(\sqrt{\dfrac{0.7(1-0.7)}{49}} ) = 0.7 \pm 0.1283 =(0.5717,0.8283)

95% confidence interval: (0.5717,0.8283)      

5 0
3 years ago
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