I need help with this precalculus question. Please help

-3/11?

As the opposite of a positive is a negative

Answer:

-3/11

Step-by-step explanation:

Answer:

The answer is 2/10 and 2/10

(A)

Answer:

40% discount

Step-by-step explanation:

40% of 20 = 8

20 - 8 = 12

Complete question is;

A long steel beam has a length of twenty-five meters on a coldday when the temperature is 0°C. What is the length of the beam on a hot day when T = 40°C. (α_steel = 1.1 × 10^(-5) °/C)

a. 25.00044 m

b. 25.0044 m

c. 25.011 m

d. 25.044m

e. 25.11 m

Answer:

Option C: 25.011 m

Step-by-step explanation:

We are given;

Initial Temperature; T1 = 0°C

Final Temperature; T2 = 40°C

Coefficient of linear expansion of steel; α_steel = 1.1 × 10^(-5) °/C

Initial length; L_o = 25 m

We know that formula for change in length is;

ΔL = LαΔT

Plugging in the relevant values, we have;

ΔL = 25 × 1.1 × 10^(-5) × (40 - 0)

ΔL = 0.011 m

Thus, new length is;

L1 = L_o + ΔL

L1 = 25 + 0.011

L1 = 25.011

Answer:

Step-by-step explanation:

Given

A line has a slope = 2

point = (5,2)

Solution

y-y1=m (x-x1)

Where y1=2,X1=5,m=2

y-2=2(x-5)

Y-2=2x-10

2x-y=-8

Equation of the line is 2x-y=-8

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[tex]d = \sqrt{ ({2 - ( - 1)})^{2} + ({3 - ( - 2)})^{2} } \\ [/tex]

[tex]d = \sqrt{ {3}^{2} + {5}^{2} } [/tex]

[tex]d = \sqrt{9 + 25} [/tex]

[tex]d = \sqrt{34} [/tex]

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Answer:

√34

Step-by-step explanation:

A(-2 , -1)   B(3 , 2)

[tex]Distance = \sqrt{(x_{2}-x_{1})^{2}+(y_{2}-y_{1})^{2}}\\\\ =\sqrt{(3-[-2])^{2}+(2-[-1])^{2}} \\\\=\sqrt{(3+2)^{2}+(2+1)^{2}}\\\\=\sqrt{5^{2}+3^{2}}\\\\=\sqrt{25+9}\\\\=\sqrt{34}[/tex]

Answer:

No, it is not a proportional relationship because the graph does not go through the origin

Step-by-step explanation:

I belive the is the answer, I took this quiz as well. The line is straight but it does not go throught the origan.

Answer:

integers

Step-by-step explanation:

integers include whole numbers and negative non fractions

Answer:

$2.60

Step-by-step explanation:

first you need to see how many time 2.90 goes into 20 it is 6, so then you multiply 2.90 times 6 and get 17.40. Lastly you subtract 17.40 from 20 to get 2.60

Hope this helps

Answer:

$2.60

Step-by-step explanation:

Answer:

D

Step-by-step explanation:

Answer:8.5 cups

ithink

im not sure

Step-by-step explanation:

Answer:

110

Step-by-step explanation:

Answer:

its 110

Step-by-step explanation:

Answer:

90

Step-by-step explanation:

Given:

Anna’s cell phone plan charges her $30 per month plus a $150 one-time activation fee.

Evelyn’s cell phone plan charges her $20 per month, plus a $450 one-time activation fee.

To find:

The number of months after which the costs for the girls’ cell phone plans the same.

Solution:

Let x be the number of months.

Total cost = Fixed cost + Variable cost

According to the question, cost equation for Anna’s cell phone is

[tex]y=150+30x[/tex]           ...(i)

Cost equation for Evelyn's cell phone is

[tex]y=450+20x[/tex]         ...(ii)

Equate (i) and (ii) to find the time after which the costs for the girls’ cell phone plans the same.

[tex]150+30x=450+20x[/tex]

[tex]30x-20x=450-150[/tex]

[tex]10x=300[/tex]

Divide both sides by 10.

[tex]x=\dfrac{300}{10}[/tex]

[tex]x=30[/tex]

Therefore, the costs for the girls’ cell phone plans the same after 10 months.

Answer:

12

Step-by-step explanation:

the total number of bills equals 12 f + t = 12 there are five times as many tens is 5+ t = 5 f substitute to eliminate t f + 5 f = 12 solve the number of fives f equals to remember there are five times as many tens t equals 10 check 2 + 10 = 12

Answer:

2 $5 and 10 $10

Step-by-step explanation:

he has 5 times as many 10 dollar bills as 5 dollar bills.

2 × 5 = 10 and 2 + 10 = 12

Answer:

CV of Bank A = 6.4

CV of Bank B = 7.1

CV of Bank B is more than CV of Bank A

Step-by-step explanation:

Bank A

6.6, 6.7, 6.7, 6.8, 7.0, 7.3, 7.5, 7.7, 7.8, 7.8

[tex]Mean = \frac{\text{Sum of all observations}}{\text{No. of observations}}\\Mean = \frac{6.6+6.7+6.7+6.8+7.0+7.3+7.5+7.7+7.8+ 7.8}{10}\\Mean =7.19[/tex]

Standard deviation =[tex]\sqrt{ \frac{\sum(x-\bar{x})^2}{n}}=0.461[/tex]

[tex]CV = \frac{\sigma}{\bar{x}} \times 100\\CV = \frac{0.461}{7.19} \times 100=6.4[/tex]

Bank B

4.0, 5.5, 5.8, 6.2, 6.6, 7.6, 7.7, 8.5, 9.4, 9.7

[tex]Mean = \frac{\text{Sum of all observations}}{\text{No. of observations}}\\Mean = \frac{4.0+5.5+5.8+6.2+6.6+ 7.6+ 7.7+8.5+9.4+9.7}{10}\\Mean =7.1[/tex]

Standard deviation =[tex]\sqrt{ \frac{\sum(x-\bar{x})^2}{n}}=1.718[/tex]

[tex]CV = \frac{\sigma}{\bar{x}} \times 100\\CV = \frac{1.718}{7.1} \times 100=24.2[/tex]

CV of Bank A = 6.4

CV of Bank B = 7.1

CV of Bank B is more than CV of Bank A

Answer:

v = 3.64 ft/s

Step-by-step explanation:

Given that,

Radius of a carousel, r = 18 feet

It takes 31 seconds to complete revolution.

We need to find the linear speed of the carousel at its outside edge. Distance covered is equal to the circumference of the circle.

d = 2πr

d = 2π × 18 = 113.09 feet

Let v is the linear speed. It can be given by :

[tex]v=\dfrac{D}{t}\\\\v=\dfrac{113.09}{31}\\\\v=3.64\ ft/s[/tex]

So, the linear speed of the carousel is 3.64 ft/s.

Answer:

-44

Step-by-step explanation:

first take -2 to the fifth power (-32) , after that take -2 to the second power (4) and then take -2 to the third power (-8). Subtract -32 and 4, then add -8 and you get your answer.

Answer:

The answer is y=10x. Let x represent the pizzas. The reason we use x is that we don't know how many PizzAs they're talking about, but we do know that EACH pizza cost 10$

Answer:

The duration of the randomly selected class is 52.6 minutes.

Step-by-step explanation:

The random variable X is defined as the duration of a professor's class.

It is provided that, [tex]X\sim Unif(49.2, 55.5)[/tex].

The pdf of X is:

[tex]f_{X}(x)=\frac{1}{55.5-49.2};\ 49.2<X<55.5[/tex]

It is provided that the probability that the duration of the class is longer than c number of minutes is 0.468.

That is, P (X > c) = 0.468.

Compute the value of c as follows:

[tex]P(X>c)=0.468\\\\\int\limits^{55.5}_{c}{\frac{1}{55.5-49.2}}=0.468\\\\\frac{1}{6.3}\times [x]^{55.5}_{c}=0.468\\\\55.5-c=2.9484\\\\x=52.5516\\\\x\approx 52.6[/tex]

Thus, the duration of the randomly selected class is 52.6 minutes.

Answer:

6200000000000000

Step-by-step explanation:

Answer:

6,200,000,000,000,000

Step-by-step explanation:

6.2 x [tex]10^{15}[/tex] = 6,200,000,000,000,000

Answer:

no solution

Step-by-step explanation:

Answer:

y=6x+5

Step-by-step explanation:

I am not sure if this is the answer but it's worth a try...

1. The y-intercept of a line is on a graph where a line crosses through the y axis.

2. b is the y- intercept and m is the slope. For example something using y=mx+b could be written like y=3x+2 if the y-intercept is 2 and the slope is 3.

3. The slope is what describes the direction and steepness of a line on a graph. Rise and run mean that when you find a slope you must first find the rise over run. You must go from one dot on a graph to the next by first going up or down to where that you are on the same number on the y axis that the next point is, next go on the x axis and go left or right until you have reached the next point. For example if you went up 3 and over 2, the rise would be 3 and the run would be 2. The slope in that situation would be 3/2.

Hope this helps you.

Do the steps below on the graphing calculator:

Graph the points (2,6) and (6,8).

Define the equation y = mx + b.

Define the variable m = 1.

Define the variable b = 10.

What happens if you increase the value of m from 1 to 2?

✔ The line gets steeper.

Find the values of m and b that cause the graph to pass through the two points plotted.

m = ✔ 0.5

b = ✔ 5

Answer:

the expression is 9)+9(12=21

Step-by-step explanation:

Answer:

commutative property: the property stating that changing the order in which two numbers are added or multiplied does not change the value of the sum or product

equivalent: having the same amount, value, area, volume, or force

evaluate: to determine the value of

like terms: terms consisting of the same variables, raised to the same exponent

Step-by-step explanation:

I had to edit my answer bc it was wrong ignore this block teehee sorry

Answer:

99, 93, 87, 81

Step-by-step explanation:

Answer : 11.80$

Step-by-step explanation:

He spends 8.70$ on Fruit chews and..

4.50 $ on jelly beans

add them up then subtract them by the amount of money he already has

BRAINLIST ???

Answer:

He had 10.85 left

Step-by-step explanation:

Fruit chews 4.7 x 1.6 = 7.52

Jelly beans 2.35 x 2.6 = 6.11

7.52 + 6.11 + 0.52 = 14.15

25 - 14.15 = 10.85

THIS IS NOT W

Step by step

Answer:

0.611428571

Step-by-step explanation:

[tex]4.28 \div 7 \\ \\ = \frac{4.28}{7} \\ \\ = 0.611428571 \\ [/tex]