-4x + 7 = 31
Solve for x

Answer:

B. (-2,-4)

Explanation

Given equations:

   y = 3x + 2

   y = -2x - 8

Solving both equations will yield the values of x and y;

Solution:

   y = 3x + 2    ----- (i)

   y = -2x - 8   ------ (ii)

Using substitution method, input equation i, into ii

    3x + 2 = -2x - 8

Collect like terms and solve;

     3x + 2x = -8 -2

         5x  = -10

            x  = -2

Then put x = -2 into i, to find y

      y = (-2 x 3) + 2

       y = -6 + 2 = -4

So, the solution of the equation is B. (-2,-4)

Answer: q= -3.6

Step-by-step explanation:

q+2.7=-.9

  -2.7.  -2.7

------------------

q= -3.6

Answer:

q=-3.6

Step-by-step explanation:

Answer:

60

Step-by-step explanation:

Answer:

In one Pb&j it is 385 and in three it has 1,155 (385×3=1,155 )

Answer:

part A = x= 385 Part B= Part A Part C= 1155

Step-by-step explanation:

Part A

770/2 = x/1

770= 2x

x= 385

Part B

Thats the same question as part A? so just use the answer from A i guess

Part C

770/2 = x/3

2310 = 2x

x = 1155

Answer:

4 1/2 as a decimal is 4.5

Step-by-step Explanation:

Step 1: You multiply the whole number by the denominator:

4 × 2 = 8

Step 2: Add 8 to the numerator:

8 + 1 = 9

Step 3: Then, you divide 9 by the denominator:

9 ÷ 2 = 4.5

I hope this helped you

Answer:

(-5,2); opens up

Step-by-step explanation:

In the equation y = a(x − h)² + k, if a is positive it opens up

The vertex is: (h, k)

Since in the equation h is multiplied by a negative one, you have to flip the sign of h in the equation.

(x-(-5)) = (x+5)

Answer:

[tex]\frac{20}{9}[/tex] or [tex]2\frac{2}{9}[/tex]

Step-by-step explanation:

[tex]2[/tex] ÷ [tex]\frac{9}{10}[/tex]

Rewrite [tex]2[/tex] in fraction form:

[tex]\frac{2}{1}[/tex] ÷ [tex]\frac{9}{10}[/tex]

When dividing fractions, we invert the divisor ([tex]\frac{9}{10}[/tex]) and multiply it by the dividend ([tex]\frac{2}{1}[/tex]):

[tex]\frac{2}{1}[/tex] × [tex]\frac{10}{9}[/tex]

Multiply the numerators and denominators:

Improper fraction: [tex]\frac{20}{9}[/tex]  

Mixed number: [tex]2\frac{2}{9}[/tex]

Step-by-step explanation:

(b) x is at 2 twice, and -2 twice.

y is at 2 three times, and -2 three times.

The graph that fits is I.

(c) x is at 2 twice, and -2 twice.

y is at 2 once, and is never negative.

The graph that fits is IV.

(d) x is at 2 and stays there for a period of time.

y is at -2 and stays there for a period of time.

The graph that fits is II.

Answer:

ok can u comment done any one question that u need help on?

Answer:

1.) 1

2.) 3600

3.) 242

Step-by-step explanation:

1- 523 / 523 = 1

2- 12 x 300 = 3600

3- 144 + 98 = 242

Answer:

The answer is below

Step-by-step explanation:

The z score is a score used to determine the number of standard deviations by which the raw score is above or below the mean, it is given by the equation:

[tex]z=\frac{x-\mu}{\sigma} \\\\\mu=mean, \sigma=standard\ deviation,x=raw\ score\\\\for\ a\ sample\ n:\\\\z=\frac{x-\mu}{\sigma/\sqrt{n} }[/tex]

Given that μ = 650, σ = 50. To find the probability that 5 students who have a mean of 490, we use:

[tex]z=\frac{x-\mu}{\sigma/\sqrt{n} } =\frac{490-650}{50/\sqrt{5} } =-7.16[/tex]

From the normal distribution table, P(x < 490) = P(Z < -7.16) = 0.0001 = 0.01%

Since only a small percentage of people score about 490, hence the local newspaper editor should write a scathing editorial about favoritism

Answer and Step-by-step explanation:

Let

P = this computer program has a logical error in the first ten lines.

q = it is being run with an incomplete data set.

Not p = ¬p

P or q = p ∨ q

P and q = p ∧ q

If p then q = p → q

P if and only if q = p ↔ q

a)  Computer program does not have a logical error in the first ten lines or is not being run with an incomplete data set.

     ¬p ∨ ¬q

b)  Computer program has a logical error in the first ten lines, or it is not being run with an incomplete data set

p v ¬q

c) Computer program does not have a logical error in the first ten lines, and it is not being run with an incomplete data set

¬p v ¬q

d)  Computer program has a logical error in the first ten lines, and it is not being run with an incomplete data set.

P v ¬q

e)  Computer program does not have a logical error in the first ten lines, and it is being run with an incomplete data set

¬p v q

Answer: 1

Step-by-step explanation:

Answer

Step-by-step explanation:

rise=1 and run=1

Answer:

10

Step-by-step explanation:

Plug in 5 for x, and 10 for y in the expression:

5 + 7(5) - 3(10)

Remember to follow PEMDAS. PEMDAS is the order of operation, and stands for:

Parenthesis

Exponent (& Roots)

Multiplication

Division

Addition

Subtraction

First, Multiply:

7 * 5 = 35

-3 * 10 = -30

5 + 35 -  30

Combine like terms:

(5 + 35) - 30

40 - 30 = 10

10 is your answer.

~

Answer:5.68x10^5

Step-by-step explanation:

Answer:

There is no way to determine.

Step-by-step explanation:

Sorry I could not help...

hope you figure it out!

Answer:

Pair 1 and 2, pair 2 and 3, pair 3 and 4, pair 4 and 1

Step-by-step explanation:

Any pair of numbers that isn't diagonal from each other can be a pair. A linear pair is simply two angles that add up to 180°, so if you have a completely straight line with a ray coming up from it at any angle, that's a linear pair. Choose any two of the four options I gave you.

Answer: (Option 2)

Step-by-step explanation: 10 to the second power represents the biggest square. 6 to the eight power represents the 2nd biggest square. The hypotenuse which is 8 to the second power would give you answer B.

Answer:

Step-by-step explanation:

First you need to find a common denominator which in this case it 10

*Remember that whatever you do to thee bottom you need to do to the top*

3/10 - 3/10

2/5 = 4/10

1/2= 5/10

So the order is

Katrina - 3/10

Jackie - 4/10

Molly - 5/10

Hope this helped

Answer:

Step-by-step explanation:

a) Mean = sum of variables/sample size

For Viewers aged 18-34

Data given

24.2 21.0 17.8 19.6 23.4 19.1 14.6 27.1 19.2 18.3

22.9 23.4 17.3 20.5

Sum of variables = 34+24.2+21.0+17.8+19.6+23.4+19.1+14.6+27.1+19.2+18.3 +22.9+23.4+17.3+20.5

= 288.4

Sample size = 14

Mean = 288.4/14

Mean = 20.6

Median is the value at the middle of the data after rearranging either ascending or descending order.

On re arranging

14.6, 17.3, 17.8, 18.3, 19.1, 19.2, )19.6, 20.5, (21.0, 22.9, 23.4, 23.4, 24.2, 27.1

Based on the arrangement it can be seen that the value  at the middle is 20.5 and 19.6 so we will take the average of the values.

Median = 19.6+20.5/2

Median = 20.05

hence the median value is 20.05

b) For Viewers aged 35-49

Data given

24.9 34.9 35.8 31.9 35.4 29.9 30.9 36.7 36.2 33.8

29.5 30.8

Sum of variables = 24.9+34.9+35.8+31.9+35.4+29.9+30.9+36.7+36.2+33.8 +29.5+30.8

= 390.7

Sample size = 12

Mean = 390.7/12

Mean = 32.56

Median is the value at the middle of the data after rearranging either ascending or descending order.

On re arranging

24.9, 29.5, 29.9, 30.8, 30.9), 31.9, 33.8, (34.9, 35.4, 35.8, 36.2, 36.7

Based on the arrangement it can be seen that the value  at the middle is 31.9 and 33.8. Taking the average vale;

Median = 31.9+33.8/2

median = 32.85

Hence the median of the data is 32.85

c) Based on both means, the mean value of the people between ages 35-49 is grater than that of ages 18-34. This shows that the people under age of 35-49 watches more traditional TV per week and due is due to the greater mean value they possess.

The median value of the people between ages 35-49 is also grater than that of 18-34 by 12.8 (32.85-20.05)

Answer:

Your base is -5 and your exponent is 6.

Step-by-step explanation:

Mark me as Brainliest plz!!!

Answer:

x=2

Step-by-step explanation:

4x-9=-1

+9  =  +9

4x=9+(-1)

4x=8

divided by 2

x=2

Hope this helps :)

Answer:

Kindly check explanation

Step-by-step explanation:

Experiment of tossing a coin twice :

A.) Experimental outcome:

Head = H ; Tail = T ;

Head and Head = HH

Tail and Tail = TT

Head and Tail = HT

Tail and Head = TH

Number of head(s) on toss = z

C)

Experimental outcome ___number of heads(z)

HH _____________________2

TT _____________________ 0

TH _____________________ 1

HT _____________________ 1

D) the random variables defined are discrete because they are only take up integer values within a specified range

The following conclusions of the random variable will be

a. Total outcome = 4 {HH, HT, TH, TT}

b. The experimental outcomes = 2 {TH, HH}

c. The experimental outcomes = 1 {HH}

d. Random variable is discrete.

Random variables are rules relating the sample space's elements to real numbers.

Those random variables, which take only distinct values, are called discrete random variables.

Those random variables, which take any value from a given continuous interval of real numbers are called continuous variables.

The experiment of tossing a coin twice.

The total number of outcomes will be

Total outcome = 4 {HH, HT, TH, TT}

a. List the experimental outcomes.

Total outcome = 4 {HH, HT, TH, TT}

b. The number of heads occurring on two coin tosses.

The experimental outcomes = 2 {TH, HH}

c. A random variable that represents the number of heads occurring on the two tosses.

The experimental outcomes = 1 {HH}

d. Random variable is discrete.

More about the random variable link is given below.

https://brainly.com/question/8924372

Answer:

a= 3

Step-by-step explanation:

11=1/3a + 2

-2  -2

9=1/3a

a = 3

Answer:

10 k cal

Step-by-step explanation:

the ecosystem has ecological of 10%

the producer level is 1000 kilo-calories

the primary consumer will contain 10 % of the producer:

10000*10%=1000

the secondary consumer will contain 10% of the primary:

1000*10%=100 k cal

the tertiary will get 10% of the secondary: 100*10%=10 kcal