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ser-zykov [4K]
3 years ago
9

Solve the non-standard equation for x. -18 + x = -4​

Mathematics
2 answers:
Kobotan [32]3 years ago
5 0

Answer:

x = 14

Step-by-step explanation:

PIT_PIT [208]3 years ago
4 0

Answer: x = 14

Step-by-step explanation:

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3. State if each statement is correct. If it is not correct, then fix the mistake.
olya-2409 [2.1K]

Answer:

All are incorrect

Step-by-step explanation:

Required

Determine which is correct or not

(a)\ 2x * 2x = 4x

This is incorrect because:

2x * 2x = 2 * 2 * x*x

2x * 2x = 4x^2 ---- fixed

(b)\ 3x^3 * 3x^3 = 9x^9

This is incorrect because:

3x^3 * 3x^3 = 3 * 3 * x^3 * x^3

3x^3 * 3x^3 = 9x^(3+3)

3x^3 * 3x^3 = 9x^6 ---- fixed

(c)\ 4x(4x + 5) =8x + 5

This is incorrect because:

4x(4x + 5) =4x * 4x + 4x * 5

4x(4x + 5) =16x^2 + 20x ---- fixed

4 0
4 years ago
Help me understand how to do this
NeTakaya
U need the law of cosines and heron's formula
4 0
3 years ago
Read 2 more answers
an insect population grows at a rate of 25% per year.if its initial population is 4.2 million what will be its population in thr
marusya05 [52]

The population after 3 years would be 8.20 millions.

Step-by-step explanation:

Given,

Initial population = I = 4.2 million

Growing rate = r = 25%

If the initial population and growing rate is given, the formula to calculate the population (x) after n years would be:

x = I * (1 + \frac{r}{100} )^{n}

By putting the values in the equation, we get

x = 4.2 * (1 + \frac{25}{100} )^{n}

The population after 1st year (x1) would be

x1 = 4.2 * (1 + \frac{25}{100} )^{1}

x1 = 5.25 million

Similarly,

x2 = 4.2 * (1 + \frac{25}{100} )^{2}

x2 = 6.56 million

x3 = 4.2 * (1 + \frac{25}{100} )^{3}

x3 = 8.20 million

Hence, the population after 3 years would be 8.20 millions.

But, if you are asking about the total population at that time. It would be

I + x1 + x2 + x3 = 24.21 million

7 0
4 years ago
Because of a mistake in​ packaging, a case of 16 bottles of wine contained 9 of brand A and 7 of brand​ B, each without labels.
attashe74 [19]

Answer:

a) The probability that all five are brand​ A is 0.0288

b) The probability that exactly two bottles are brand​ A is 0.0288

c) The probability that none of the bottles is brand​ A is 0.0048

Step-by-step explanation:

We have 9 bottles of brand A and 7 bottles of brand B.

The total of bottles is 16.

a) The probability that all five bottles are brand​ A is given by:

P(5A)=\frac{9}{16} \frac{8}{15}\frac{7}{14}  \frac{6}{13} \frac{5}{12}=\frac{3}{104}=0.0288

b) Since we have 9 bottles of brand A we calculate the probability of picking two brand A bottles and the we calculate the probability of picking 3 brand B bottles:

P(2A3B)=\frac{9}{16} \frac{8}{15}\frac{7}{14}  \frac{6}{13} \frac{5}{12}=\frac{3}{104}=0.0288

c) The probability that none of the bottles is brand​ A is the same as picking 5 brand B bottles:

P(5B)=\frac{7}{16} \frac{6}{15}\frac{5}{14}  \frac{4}{13} \frac{3}{12}=\frac{1}{208}=0.0048

7 0
3 years ago
Please help I kind of understand but not fully
Anit [1.1K]

Answer:

Graph #1 - y=-20x+40

Graph #2 - y=5x+10

Step-by-step explanation: The first thing that you do is pull two points from each of the graphs and find the slope. To find the slope you use

<h2> M = y2-y1/x2-x1</h2>

<u>FROM GRAPH #1:</u>

<h3>(3,40) (2,80)</h3>

(x1,y1)    (x2,y2)

   80-40/2-3

      20/-1

    M = -20

<u>FROM GRAPH #2:</u>

<h3>(1,10) (3,20)</h3>

(x1,y1)  (x2,y2)

  20-10/3-1

     10/2

    M = 5

2. Now once you find the slope you will use the equation of a line formula to form an equation.

<h2>y=mx+b</h2>

The (mx) is your slope, the (b) is the y-intercept. (any value on the y-axis)

3. Since we now know the equation of a line and the slope we will substitute the variables.

<u>Graph #1:</u>

y=mx+b

y=-20x+40

<u>Graph #2:</u>

y=mx+b

y=5x+10

<h3>HOPE THIS HELPS :)</h3>
3 0
3 years ago
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