Help!
Find the sum
-1/2 + 3/10

Answers

Answer 1

Answer:

-1/5

Step-by-step explanation:

make them have the same denominator by multiplying -1/2 by 5 on the bottom and top which then gives you -5/10 + 3/10 that then gives your -2/10 which reduces to -1/5

Related Questions

The half-life of Radium-226 is 1590 years. If a sample contains 500 mg, how many mg will remain after 2000 years?

Answers

Answer:
The amount of Radium-226 remaining after 2000 years is approximately 209.08 mg.

Step-by-step explanation:

We can use the formula for exponential decay to solve this problem. The formula is:

N = N0 * (1/2)^(t/T)

where N is the amount of substance remaining after time t, N0 is the initial amount of substance, T is the half-life of the substance, and t is the time elapsed.

In this case, we are given that the half-life of Radium-226 is 1590 years, and that we start with an initial amount of 500 mg. We want to find the amount remaining after 2000 years.

Substituting the given values into the formula, we get:

N = 500 * (1/2)^(2000/1590)

Evaluating the expression, we get:

N ≈ 209.08

So the amount of Radium-226 remaining after 2000 years is approximately 209.08 mg.

Find (2 × 104) − (3 × 103).

Answers

Answer:

the answer is -101

Step-by-step explanation:

hope this helps

The answer is yes 101

Please help, idk how to give extra points but I would really appreciate it if you could help

Answers

Answer:

x = 126°

x - 30 = 96°

Step-by-step explanation:

The sum of angles in a 5 sided polygon is 540°.

Hence all these angles would = 540

x + x + (x - 30) + (x - 30) + (x - 30) = 540

Collect like terms

5x - 90 = 540

Rearrange

5x = 540 + 90

5x = 630

x = 126

x - 30 = 96

"please answer asap ill give u a big like
expand and Simplify (-5√2 +3√√3) (-6√2-2√3)

Answers

The expression (-5√2 + 3√√3) (-6√2 - 2√3) can be expanded and simplified.

To expand and simplify the given expression, we will use the distributive property to multiply each term in the first set of parentheses by each term in the second set of parentheses.

(-5√2 + 3√√3) (-6√2 - 2√3) expands to (-5√2 x-6√2) + (-5√2 x -2√3) + (3√√3 x -6√2) + (3√√3 * -2√3).

Simplifying each term individually, we have:

(-5√2 x -6√2) = 30 * 2 = 60,

(-5√2 x -2√3) = 10√6,

(3√√3 x-6√2) = -18√6,

(3√√3 x -2√3) = -6 * 3 = -18.

Putting it all together, the simplified expression is 60 + 10√6 - 18√6 - 18, which can be further simplified as 42 - 8√6. Thus, the expanded and simplified form of (-5√2 + 3√√3) (-6√2 - 2√3) is 42 - 8√6.

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Seattle City Light charges residents for electricity on a daily basis. There is a basic daily charge of 11.57 cents. For each day the first 10 kWh cost 4.59 cents per kWh and any additional kWhs are 9.55 cents per kWh. Write a piece wise defined function to describe the usage rate.

Answers

Answer:

y=[tex]\left \{ {{11.57+4.59x where x\leq 10} \atop {11.57+9.55x where x>10}} \right.[/tex]

Step-by-step explanation:

Here it is given basic daily charge is 11.57 cents.

Now, the variable charge is 4.59 cents per kWh when consumption is less than or equal to 10 kWh.

So, first piece is using total cost = fixed cost + variable cost.

So, y= 11.57+4.59x when x [tex]\leq[/tex] 10

Now, if the consumption goes more than 10 kWh, the unit rate is 9.55 cents per unit. The equation for total cost is y=11.57+9.55x where x>10

3. The rectangular traffic sign is 18 inches wide and 8 inches tall. The
rectangular realtor sign is 27 inches wide and 10 inches tall. Are the
signs similar?

Answers

No, the rectangular realtor sign is 9 inches wider and 2 inches taller.

Solve this system by substitution, 16 points and brainliest to first answer!
-x -y -z = -8
-4x +4y +5z = 7
2x+2z=4
Show steps please!

Answers

- x - y - z = - 8 ------- (1)

- 4x + 4y + 5z = 7 -------- (2)

2x + 2z = 4 --------- (3)

From (3): x + z = 2

x = 2 - z --------- (4)

Substitute (4) into (1),

- x - y - z = - 8

- (2-z) - y - z = - 8

- 2 + z - y - z = -8

- 2 - y = - 8

2 + y = 8

Therefore, y = 6

Substitute y = 6 and (4) into (2),

- 4x + 4y + 5z = 7

- 4(2 - z) + 4(6) + 5z = 7

- 8 + 4z + 24 + 5z = 7

9z + 16 = 7

9z = - 9

Therefore, z = - 9

Substitute z = - 9 into (4),

x = 2 - z

x = 2 - (-9)

x = 2 + 9

Therefore x = 11

Solution:

x = 11

y = 6

z = -9

1 1grade please help

Answers

Gawd that looks really hard

Answer: 7/2

Step-by-step explanation:

[tex]\lim_{x \to \frac{1}{2}} \dfrac{8x-3}{2x-1}-\dfrac{4x^2+1}{4x^2-1}[/tex]

Multiply the left fraction by 2x+1 so both fractions have the same denominator.

[tex]\lim_{x \to \frac{1}{2}} \dfrac{8x-3}{2x-1}\bigg(\dfrac{2x+1}{2x+1}\bigg)-\dfrac{4x^2+1}{4x^2-1}\\\\\\\lim_{x \to \frac{1}{2}} \dfrac{12x^2+2x-4}{4x^2-1}\\\\\\\lim_{x \to \frac{1}{2}} \dfrac{2(3x+2)(2x-1)}{(2x+1)(2x-1)}\\\\\\\lim_{x \to \frac{1}{2}} \dfrac{2(3x+2)}{2x+1}[/tex]

Directly input x = 1/2 [tex]\dfrac{2[3(\frac{1}{2})+2]}{2(\frac{1}{2})+1}\quad =\dfrac{7}{2}[/tex]

Oksana wrote the equation below on the whiteboard.

6 b + 6 = 48

What is the value of b?
A. 4
B. 7
C. 8
D. 9

Answers

The answers 48-6/6=7

Answer:

B . 48- 6 = 42.

b =42/6=7

this is your answer

Question 2
What is the value of y in the equation 2(3y - 6) = 0? (4 points)
--2
ОО
02
06

Answers

2
2x2=6
6-6=0
0x2=0
Right? How could it be 99?

write an equivalent expression.

Answers

7•7•7
2•2•2

7^3=343
2^3= 8
343•8
=2744

(7•7•7)x(2•2•2)

List the domain and range of the graph below.

Answers

Domain: [-4, 4]
Range: [-1, 5]

A map uses the scale of 3 cm for every
10 km. If the map shows a distance of
12 cm, what is the actual distance?

Answers

Answer:

40 km

Step-by-step explanation:

Divide the distance by the scale

12/3 = 4

Multiply that number by the 10 km

4 x 10 = 40

make a conjecture about the next item in each sequence

-2, 1 , -1/2, 1/4, -1/8

Answers

Answer: 1/16

Step-by-step explanation:

Each number in the series is half of the previous number. The negatives alternate with the positives. So they must be multipling by -1/2.

-1/8(-1/2) = 1/16

After that would be

1/16(-1/2) = -1/32

Hope this helps. (And maybe worth Brainliest)

Table 3.1 Quantity Demanded Price per Unit Quantity Supplied 10 $5 50 20 $4 40 30 $3 30 40 $2 20 50 $1 10 Refer to Table 3.1. If the government imposes a price of $2, O a surplus equal to 20 units wil

Answers

Referring to Table 3.1, if the government imposes a price of $3, a shortage will result.

To determine the outcome when the government imposes a price of $3, we need to compare the quantity demanded and quantity supplied at this price level.
According to Table 3.1, at a price of $3, the quantity demanded is 30 units, while the quantity supplied is 40 units. The quantity demanded (30 units) is less than the quantity supplied (40 units), resulting in a situation known as a shortage.
A shortage occurs when the quantity demanded exceeds the quantity supplied at a given price. In this case, a shortage of 10 units occurs because consumers are willing to buy more than what producers are offering at the price of $3.
To summarize, if the government imposes a price of $3 based on Table 3.1, a shortage will result. This means that the quantity demanded exceeds the quantity supplied at the given price, indicating that consumers are unable to purchase all the units they desire.

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the complete question is:

Table 3.1
Quantity Demanded.
Price per Unit
Quantity supplied
10
$5
50
20
30
$4
$3
40
30
40
50
$2
$1
20
10
Refer to Table 3.1. If the government imposes a price of $3.
a shortage will result.
Market is in equilibrium.
the price will fall to $1 because producers will be forced to incur losses.
a surplus will result.

Part B
How many fluid ounces of vinegar should be mixed with 80 fluid ounces of water to make the cleaning
solution?

Answers

Answer:

5 fluid ounces

Step-by-step explanation:

Simplify: -7y +5 - 4+2x + 3x + 9x

Answers

Answer:

The answer would be 1 + 14x + -7y

Brainlist???

-7y+5-4+2x+3x+9x simplified is 14x-7y+1

Use the lessons we practice in class for Caesar, St. Cyr, Pigpen, and Rail Fence ciphers to answer the following prompts.

Decipher the following statement, using a St. Cyr slide. All you know about the length of the slide is that it is a prime number (i.e., 2, 3, 5, 7, 11, 13, 17, 19, 23).

ETEWPESPRCLASTYPIPCNTDPESCPPFYGZETYR

Answers

The deciphered message is: "XOZXBXPPIUDXOQHRDCQGHXHPPAGHNRAXTXL".

To decipher the given statement using a St. Cyr slide, we need to determine the correct length of the slide. Since we know that the length of the slide is a prime number, we can try different prime numbers as the length and see which one produces a meaningful decryption.

Let's try the prime numbers from 2 to 23 and see which one gives us a readable message.

Using a St. Cyr slide with a length of 2: