What is the value of x? The answer can be a decimal!
(5x - 25) °

(3x + 9°

Answer:

192

Step-by-step explanation:

There are 2 ways of solving for <4

The first is just to add the 2 angles not connected to <4

<4 = 51 + 51 = 102

The second is to find <2 and take that away from 180

<2 + 51 + 51 = 180

<2 = 180 - 102

<2 = 78

<4 + <2 = 180   (They are supplementary

<4 = 180 - 78

<4 = 102

Answer:

The value of k is 0.149.

Step-by-step explanation:

The complete question is:

In 2004, an art collector paid $84,275,000 for a particular painting. The same painting sold for $27,000 in 1950. Complete part (a) through (d)? (a) Find exponential growth rate k, to three decimal places, and determine the exponential growth function V, for which V(t) is the painting’s value, in dollars, t years after 1950.

Solution:

The exponential growth function can be expressed as follows:

[tex]y=a\cdot e^{kt}[/tex]

y = Final value after t years

a = initial value

It is provided that:

y = $84,275,000

a = $27,000

The value of t from 1950 to 2004 is, t = 54

Compute the value of k as follows:

[tex]y=a\cdot e^{kt}[/tex]

[tex]84,275,000=27,000\times e^{54k}\\\\e^{54k}=\frac{84275000}{27000}\\\\54k=\ln (\frac{84275}{27})\\\\k=\frac{1}{54}\times \ln (\frac{84275}{27})\\\\k=0.149[/tex]

Thus, the value of k is 0.149.

Answer:

Question 3: y =x+2

Step-by-step explanation:

to find the equation use y=mx+c where m is the gradient/slope and c is the y intercept. In example 3, the y intercept is 2 so thats why the equation ends in +2, and the slope which is calculated by rise over run, is 2 over 2, or 1 so x doesnt need a coefficient.

Answer:

1. 3:2

2. 7:2

3. 63:56:24

4. 16:56:63

5. 84:56:16:63

the ages added up is 219

the uncle is the oldest

Step-by-step explanation:

I'm answering by ratios because I'm not exactly sure what you mean.

24:16 = 6:4 = 3:2

56:16 = 7:2

63:56:24 is already in its simplest form I think??

16:56:63  also in its simplest form

84:56:16:63

the ages added up is 219

the uncle is the oldest

Answer:

20%

Step-by-step explanation:

trust me

Answer:

y=1.19x-4.3

Step-by-step explanation:

I did the math

Answer:

just here to steal some old points! sorry and thanks

Step-by-step explanation:

Answer:

4-12x

Step-by-step explanation:

-6(-2/3)= 12/3=4

Answer:

The nearest option is -3 (negative 3)

So, Option B is correct.

Step-by-step explanation:

We need to solve the inequality [tex]7 \leq -3x-4[/tex]

Solving:

Step 1: Switching sides of inequality and reversing the inequality

[tex]-3x-4\geq 7[/tex]

Step 2: Adding 4 on both sides

[tex]-3x-4+4\geq 7+4\\-3x\geq 11[/tex]

Step 3: Dividing both sides by -3 and reversing the inequality

[tex]\frac{-3x}{-3}\leq \frac{11}{-3} \\x\leq -3.6\\[/tex]

The nearest option is -3 (negative 3)

So, Option B is correct.

Complete Question

It is known that a particular laboratory task takes the average person 2.5 seconds (the variance is not known). A researcher was interested in whether older people are slower (take longer) on this task. The researcher tested 30 randomly selected 80-year-olds. Their mean time was 2.7 seconds, with an estimated population standard deviation of 1.4 seconds. What should the researcher conclude? (Use the .05 significance level and use the five steps of hypothesis testing.)

Answer:

The researchers  conclusion is  

   There is no sufficient evidence to show that  older people are slower at the laboratory task    

Step-by-step explanation:

From the question we are told that

   The mean time is  [tex]\mu = 2.5 \ seconds[/tex]

    The sample size is  n  =  30

    The  sample mean is  [tex]\= x = 2.7 \ seconds[/tex]

      The  standard deviation is  [tex]\sigma = 1.4 \ seconds[/tex]

      The level of significance is  [tex]\alpha = 0.05[/tex]

The null hypothesis is  [tex]H_o : \mu = 2.5[/tex]

The alternative hypothesis is  [tex]H_a : \mu > 2.5[/tex]

Generally the test statistics is mathematically represented as

      [tex]z = \frac{\= x - \mu }{ \frac{\sigma}{\sqrt{n} } }[/tex]

=>  [tex]z = \frac{2.7 - 3 }{ \frac{1.4}{\sqrt{30} } }[/tex]

=>  [tex]z =0.78[/tex]

From the z table  the area under the normal curve to the right  corresponding to  [tex]z =0.78[/tex]   is  

        [tex]p-value = P(Z > 0.78) = 0.2177[/tex]

From the value obtained we see that the p-value  > [tex]\alpha[/tex]

   The decision rule is  

Fail to reject the null hypothesis

    The conclusion is  

There is no sufficient evidence to show that the older people are slower at the laboratory task  

playing with blocks??

Answer:

Step-by-step explanation:

The rate in this case is slope of the line. The formula of a slope is m = [tex]\frac{y_{2} -y_{1} }{x_{2} -x_{1} }[/tex]  

(10, 325)

(4, 130)

m = [tex]\frac{325-130}{10-4}[/tex] = [tex]\frac{195}{6}[/tex] = 32.5 miles per gallon

The actual rate is less (better) than advertising.

Answer:

24/4=6

Step-by-step explanation:

In the model, there are 4 rows of 6 blocks. 24 total blocks divided by the 4 rows gives you six objects in each row.

HTH :)

Answer:

16.00

Step-by-step explanation:

19.99 - 25% + 6% = 15.89 =16.00

Answer:

x = 7deg

Step-by-step explanation:

7x + 10 + 15x + 16 = 180 (angles adjacent to each other in a //polygon are supplementary)

22x = 154

x = 7deg

This is a question on polygons and angles. If you wish to venture further into it/understand this topic better, you may want to follow my Instagram account (learntionary), where I post some of my own notes on certain topics and also some tips that may be useful to you :)

Answer:

40 mph or 40 miles per hour

Step-by-step explanation:

If there is 240 miles in 6 hours, so you can divide the 240 by 6 to get the unit rate of miles per hour.

240 divided by 6 is 40

Answer: 240 miles in 6 hours as a unit rate would be 240 over 6. This is because with unit rates to find how many miles in one hour you would divide 240 by 6. (This would give you 40.)

Answer:

the answer is 75%

Step-by-step explanation:

[tex]6000 \times 7 = 42000[/tex]

[tex] \frac{42000}{56000} \times 100 = 75[/tex]

Answer:

She reached 75% of her goal!

Step-by-step explanation:

first i find out how many steps she took in total:

6000 x 7 = 42000

then i set up proportions so i can cross multiply

[tex]\frac{42000}{50000}= \frac{x}{100}[/tex]

42000 x 100 = 4200000

4200000 / 56000 = 75

Answer:

you can alwayd use desmos for graphing

Answer:

The answer is 4pq−pr−2qr

Answer:

60-12=48min

Step-by-step explanation:

Kimberly takes 12 min, 1/5 of 60 min.

Answer:

4/12

Step-by-step explanation:

Because the bottom numbers are the same just subtract the top numbers:

8/12 -4/12 = 4/12

4/12 can simplify to 1/3

Answer:

350 decimeters

Step-by-step explanation:

I did it on my calculator

Answer:

690 and 6,900

Step-by-step explanation:

     230

x      33

______

     690

+   6,900

________

    7590

Answer:

62.3

Step-by-step explanation:

6

8.9

*7

____

 62.  3

I tried to show how to do it but carry the 6 at the top

Answer:

64 (I rounded btw)

Step-by-step explanation:

8.9 × 7 = ??

1. Round 8.9

2. 8.9 can be rounded to 9

3. change equation

4. 9×7= 63

Thus, your answer is 63

(If your supposed to do the math differently tell me and I'll correct it)

Answer:

Trick question, either 8 legs because of the two chairs or none.

Step-by-step explanation:

The dogs and everything aren't on the ground. I think the anwser is either 8 or none.

Answer:

The number of legs on the ground are 10.

Step-by-step explanation:

Given information:

2 dogs , 4 horses and 1 giraffe and a duck are laying on the bed.

3 chickens are flying over two chairs .

Now, in the riddle the specific type of leg is not mentioned but the information is given about the bed and chair.

So, one need to consider the legs of bed and chair too, also the person entering in the room is on the ground so the legs of the person will also be counted.

Hence, total number of legs on the ground will be:

legs of (1 bed + 2 chairs + 1 person)

Hence

Number of legs (N) = 4+8+2

N=10

Hence, the number of legs on the ground are 10.

For more information visit:

https://brainly.com/question/478260?referrer=searchResults

Answer:

D. 19

Step-by-step explanation:

x+5 has to equal half of the base(3x-9)

I tried everything else. Those answers didn't work. 3*19-9=48 and 19+5=24

48/2=24 Therefore, the answer is D, 19

Answer:

brainlist first

Step-by-step explanation:

Answer:

12)fx is the answer

Step-by-step explanation:

Answer:

-5 = x  and 9 = y

Answer:

I think 22.2814177

Step-by-step explanation:

I used 3.14 that's what my teachers tell me to use sorry if it's wrong

Answer: 22.2927232313

Step-by-step explanation: *Pi = 3.14159265359

                                              *3.14159265359 x 2444.57 = 7,679.84315319

                                               *7,679.84315319 ÷ 344.5 = 22.2927232313

    Hence, 22.2927232313 = 3.14159265359 x 2444.57 ÷ (344.5)