Simplify the following expressions:
10x + 6 + 2(x + 5)
6 - 5(x + 2)
-2x - 10(2 + 4x)
6 - (x + 3)
3x - (x + 10) + 12

Answer:

120

Step-by-step explanation:

Answer:

Step-by-step explanation:

The diameter of a circle is twice the radius, so the statement is false.

Answer:

12

Step-by-step explanation:

Answer:

x+64= 90

x = 90 - 64

x = 26°

thanks

Answer:

18 weeks

Step-by-step explanation:

250 - 70 = 180

180/10 = 18 weeks

Answer:

18 Weeks

Step-by-step explanation:

The least amount of weeks that Irene must work in order to buy the bike is 18. To find your answer, subtract $70 from $250. You will get $180. This is the amount of money that Irene still needs to earn. If she saves her money for 18 weeks, she will have her $180. This is because $180 divided by $10 is 18.

Answer:

3^4

Step-by-step explanation:

3 to the power of 4

Answer:

I think an answer would be 3 to the third or fourth power

or

9x9

Step-by-step explanation:

3x3 = 9 so if you split it up you have two 3x3s

9x9

Answer:

B. 40

Step-by-step explanation:

We know that the large angle is 90 degrees as it is a right angle. Thus, [tex]10+2x=90[/tex] (I don't know how to include degree symbols). We solve: [tex]2x=80[/tex], so then [tex]x=40[/tex]. Thus, x is forty degrees and the answer is B.

Answer:

40

Step-by-step explanation:

There is a bisector splitting a 90-degree angle into 2 parts, we are given that one of them is 10. This can only mean the other side is 80 degrees in total.

and 80/2 is 40

Answer:

the answer is  8 or

Step-by-step explanation:

if you are looking for the number that is in between the numbers, then you would cross them off equally from left to right, and the last two numbers would be 7 and 9. when this happens you look between them, so in this case the answetr would be 8

Answer: I think it's always!

Step-by-step explanation:

Create a right triangle with the hypotenuse = 2400in (same as 200ft) and angle from horizontal =15 degrees

you can create the equation to find the opposite line (y-value)

2400sin(15) =

621 in

Answer: 8, 2 1/6, 50, 90, 7

Step-by-step explanation:

1. Average speed = Distance/Time taken for entire trip

(10 * 3 + 2 * 1)/(3+1) = 32/4 = 8 mph

2. 6 1/4 = 25/4  9 3/8 = 75/8  (75/8)/(25/4) = 3/2

x = 3/2 + 2/3 = 13/6 = 2 1/6

3. Let's say there are x quarters in the collection, there would be 3x nickels, 2x dimes, and x quarters in the collection. The collection would be worth

3x * 5 + 2x * 10 + x * 25 = 300 cents

Solve for x to get x = 50 so there are 50 quarters in the collection

4. Sam has drove 2 * 45 = 90 miles so he has 90 miles remaining. Let's say he has to drive x hours to make his average speed 60 mph, we can use this equation to find how long he has to drive

(90+90)/(x+2) = 60 and x = 1

He has to drive 90 miles/1 hour = 90mph to make his average speed 60 mph.

5. Let's say you have to run x mph to satisfy the requirements, we can use the equation

(1.5*3+0.5*x)/(1.5+0.5) = 4 and x = 7 so you have to run 7 mph in the next 0.5 hours to satisfy the requirements

Answer:

The circumference is 50.24in.

Step-by-step explanation:

All you have to do is multiply the diameter by 3.14. Easy and so simple

The circumference of the given wheel is 50.24 inches.

The Circumference of a circle is defined as the product of the diameter of the circle and pi.

C = πd

where 'd' is the diameter of the circle

We have been given data as follows:

The diameter of the circle (d) = 16 cm

Circumference of the circle = πd

Substitute the values in the above formula and we get

Circumference of the circle = 3.14 × (16)

Apply the multiplication operation, and we get

Circumference of the circle = 50.24

Thus, the circumference of the given wheel is 50.24 inches.

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Answer:

Option 2 , 4 & 5 are true.

Step-by-step explanation:

● Option 2 is equivalent to a² + b² = c².

● Option 4 & 5 can be found by :-

Answer:

86.7cm

Step-by-step explanation:

((5.95x5.1)/2)x4=60.69

5.1x5.1+60.69=86.7cm

good luck!

uh it's 4 yes. the answer would be 4

Answer:

it's 4

hope it is helpful to you

Answer:

C.) YT

Step-by-step explanation:

Parallel lines are horizontal lines

Perpendicular lines mean lines that are vertical

Hope this helps! :)

Answer:

[tex]\Large \boxed{\sf D}[/tex]

Step-by-step explanation:

Perpendicular lines are lines which make an angle of 90° with each other.

Line QY is perpendicular to line LD

Answer: 1 1/7

Step-by-step explanation: 3/7 - 2/7 = 1/7

here the  answer  here you  Step-by-step explanation:

here an the 1 1/7

Option (a) Tectonic plate movement.

Explanation:- Wegener suggested that perhaps the rotation of the Earth caused the continents to shift towards and apart from each other. (It doesn't.) Today, we know that the continents rest on massive slabs of rock called tectonic plates. The plates are always moving and interacting in a process called plate tectonics.

Answer:

8 for first little numbers in each, and 6 for other 2 numbers. Total diffrence: 14.

Answer:

8 for first little numbers in each, and 6 for other 2 numbers. Total diffrence: 14.

Step-by-step explanation:

Answer: 4.27% of adults in the USA have stage 2 high blood pressure.

Step-by-step explanation:

Let x be a random variable that denotes a person with high blood pressure .

Given: Average blood pressure: [tex]\mu=122[/tex]

Standard deviation: [tex]\sigma=22[/tex]

Someone qualifies as having Stage 2 high blood pressure if their systolic blood pressure is 160 or higher.

The probability that an adult in the USA have stage 2 high blood pressure:

[tex]P(x\geq160)=P(\dfrac{x-\mu}{\sigma}}\geq\dfrac{160-122}{22})\\\\=P(z\geq1.72)\ \ \ [z=\dfrac{x-\mu}{\sigma}]\\\\=1-P(z<1.72)\\\\=1-0.9573\ \ [By\ p-value\ table]\\\\=0.0427=4.27\%[/tex]

Hence, 4.27% of adults in the USA have stage 2 high blood pressure.

Answer:

I was pretty sure it was C.

Step-by-step explanation:

Sorry if I'm wrong.

when the discriminant is = 0

Since 0° < θ < 90°, you know that cos(θ) > 0.

Recall that

1 + tan²(θ) = sec²(θ)

and also that

sec(θ) = 1/cos(θ)

So if cos(θ) > 0, we also have 1/cos(θ) = sec(θ) > 0.

Then

sec(θ) = + √(1 + tan²(θ))

sec(θ) = √(1 + (7/8)²)

sec(θ) = √113 / 8

so that

cos(θ) = 1 / (√113 / 8) = 8 / √113

Answer:

200 recyclable items

Step-by-step explanation:

The computation of the number of recyclable items would be sort in 4 minutes is shown below:

Given that

There is 150 recyclable items in 3 minutes

So in 4 minutes, the no of recyclable items is

= 150 × 4 ÷ 3

= 200 recyclable items

Answer:

10.5 this is the answer

Step-by-step explanation:

10.5

Answer:

1.89

Step-by-step explanation:

The approximate half life of the substance is 1.90 hours.

Half life of any quantity implies the time at which its value becomes half of the initial value. To calculate it consider an exponentially decaying function which has a decay factor that is the rate of decaying. Then, the half life is calulted as the ratio of ㏒(2) to the decay factor.

Given that,

The initial amount of  radioactive substance is 15 grams.

And, after 3 hours the final amount is 5 grams.

The given problem can be written in the form of exponential decay as,

N = N₀e^(-at)

Where N₀ and N are the initial and final values and a is the decay constant.

Substitute the corresponding values in the above equation to get,

5 = 15e^(-3a)

=> e^(-3a) = 1/3

=> 3a = ln(3)

=> a = ln(3)/3

       = 0.366

Since, the half life is evaluated as 0.693/a.

The half life for the given case is 0.693/0.366 = 1.90

Hence, the half life of the given radioactive substance is 1.90 hours.

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Answer: C

Step-by-step explanation:

The first 2 letters match but the third one doesn’t and S= match so it is SSA