Roselyn buys 6 notebooks and 4 dry erase markers. The price of each item is listed below

notebook: 1.95
dry erase markers:200

Answer:

9 laps takes 5 minutes 25 seconds.

Step-by-step explanation:

Here is given:

4 laps takes 6 minutes 12 seconds.

We have to find how long 1 lap takes.

4/4 6/4 12/4 --> 1 lap takes 2 minutes 33 seconds.

Now, multiply each by 9 because you want to find 9 laps, so:

1x9 2x9 33x9 --> 9 laps takes 5 minutes 25 seconds.

Hope this helps :)

Answer:

11.25

Step-by-step explanation:

Answer:

the mean is 3

Step-by-step explanation:

Answer: $252

Step-by-step explanation:

21$ an hour x 12 hours = $252 total :)

Answer:

She earned $252 thsi month.

Step-by-step explanation:

1  hour = $21

12 hours = $?

21*12 = 252

Kira has $19, Boris has $75, and Deshuan has $25.

We will denote as follows:

From information, we can set up equations:

B = 3D (Boris has 3 times what Deshuan has)

D = K + 6 (Deshuan has $6 more than Kira)

K + B + D = 119 (The total amount of money they have is $119)

Substituting equation 2 into equation 1, we have:

B = 3(K + 6)

Substituting equations 1 and 2 into equation 3:

K + 3(K + 6) + (K + 6) = 119

K + 3K + 18 + K + 6 = 119

5K + 24 = 119

5K = 119 - 24

5K = 95

K = 95 / 5

K = 19

Using equation 2, we can find D:

D = K + 6

D = 19 + 6

D = 25

Using equation 1, we can find B:

B = 3D

B = 3 * 25

B = 75.

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Answer:

\(1276\)

Step-by-step explanation:

\(17-3+389-8+82-373+738+392-38-3+83\)

\(842+392-38-3+83\)

\(1196-3+83\)

\(=1276\)

Answer:

\(1276\)

Step-by-step explanation:

\(17 - 3 + 389 - 8 + 82 - 373 + 738 + 392 - 38 - 3 + 83 \\ = 14 + 381 - 291 + 1130 - 41 + 83 \\ = 395 + 839 + 42 \\ = 1276\)

Answer:

13 so yeah it correect

Answer: 40%

Step-by-step explanation:

Answer:

A) The answer is D, 8a + 5

4a + 5 + 4a

we simplify this expression(combine like terms):

group them first;

(4a + 4a) + 5

8a + 5

B) 2c + 6 + 3c - 4

simplify this expression (combine like terms):

group them first;

(2c + 3c) + (6 - 4)

5c + 2

Answer:

1.\(8a+5\)
2.\(5c+2\)

Step-by-step explanation:

Given the following questions:

\(4a+5+4a\)
\(2c+6+3c-4\)

In order to simplify the two expressions, we have to group the terms that have similar variables, and then combine those terms by adding/subtracting the numbers that have the similar variables.

Number one:
\(4a+5+4a\)
\(4a+4a+5\)
\(4a+4a=8a\)
\(8a+5\)

Number two:
\(2c+6+3c-4\)
\(2c+3c+6-4\)
\(2c+3c=5c\)
\(5c+6-4\)
\(6-4=2\)
\(5c+2\)

Hope this helps.

C

y=e^x

x=log base e

same as

16=2^x

x=log 16 base 2

Answer:

C

Step-by-step explanation:

You have to convert them from logarithm to exponential.

The first one becomes x = 2^16

The second one becomes 2 = 16^x

The third one becomes 16 = 2^x

The fourth one becomes x = 16²

The third one is your answer.

Answer:

1:2

Step-by-step explanation:

i did 16 divided by 4 and got 4, then 24 divided by 4 and got 8 (4:8), then divided 4 by 4 and got 1, and 8 divided by 4 and got 2 (1:2). hope i helped!

Given:

log a=-3

log b=-9

log c =3

To find the value of

Since, log a=-3, log b=-9, log c =3

We get,

Using these values in the given expression we get,

Hence, the answer is -81.

Answer:

7⅓ cups of water

Step-by-step explanation:

Water-salt mixture ratio = ¾ cup of salt to 5½ cups of water (¾ : 5½)

To maintain this water to salt ratio, if you intend to use 1 cup of salt, the number of water you need to add can be calculated as follows:

¾ cup of salt : 5½ cups of water = 1 cup of salt : x cups of water

¾ : 5½ = 1 : x

\( \frac{\frac{3}{4}}{5\frac{1}{2}}. = \frac{1}{x} \)

\( \frac{\frac{3}{4}}{\frac{11}{2}} = \frac{1}{x} \)

\( \frac{3}{4}*{\frac{2}{11} = \frac{1}{x} \)

\( \frac{3}{2}*{\frac{1}{11} = \frac{1}{x} \)

\( \frac{3*1}{2*11} = \frac{1}{x} \)

\( \frac{3}{22} = \frac{1}{x} \)

Cross multiply

\( 3x = 22 \)

Divide both sides by 3

\( \frac{3x}{3} = \frac{22}{3} \)

\( x = 7\frac{1}{3} \)

Number of cups of water to add to 1 cup if salt is 7⅓ cups.

Answer:

d

Step-by-step explanation:

Answer:

D B ?? i think this is correct

Step-by-step explanation:

Answer:

B and C

Step-by-step explanation:

1/5 prefer apple juice

T = prefer orange juice

9/20 prefer apple or oranger juice

First, we can subtract 1/5 from 9/20 to get 1/4 (simplified)

Equation = 9/20  - 4/20 = 5/20 = 1/4

Plug it in:

A. 9/20 + 1/4 =1/5 (Incorrect)

B. 1/5 + 1/4 = 9/20 (Correct

C. 1/4 + 1/5 = 9/20 (Correct)

D. 1/4 - 1/5 = 9/20 (Incorrect)

Answer:

1/5 + t = 9/20

t + 1/5 = 9/20

Step-by-step explanation:

1/5 are apple + unknown for orange = apple + orange

1/5  + unknown = 9/20

Let t = unknown

1/5 + t = 9/20

order doesn't matter on the left side since we are adding

t+1/5 = 9/20

Answer:

Step-by-step explanation:

There are four different color marbles.

Probability of blue:

Next, there are 3 marbles left in the bag since no replacement.

Probability of red after blue:

The probability of these two steps in order:

Complement of R is:

Answer:

.........................................................

Step-by-step explanation:

.................................................

Answer:

some ppl got summer school

Step-by-step explanation:

Answer:

15

Step-by-step explanation:

15 show wisbf disbesnsjs sjsnsid e ejeisoe. ejdjdnd

Step-by-step explanation:

To determine whether a triangle is a right triangle, we can use the Pythagorean theorem, which states that in a right triangle, the square of the hypotenuse is equal to the sum of the squares of the other two sides.

Let's denote the three sides of the given triangle as a = 23, b = 30, and c = 19. We can check if these side lengths satisfy the Pythagorean theorem as follows:

c^2 = a^2 + b^2

19^2 = 23^2 + 30^2

361 = 529 + 900

Since 361 is not equal to 529 + 900, we can see that the given triangle is not a right triangle.

Answer:

I forget about these theorems and such, but pretty sure this is the Hypotenuse - Leg congruence theorem.

Step-by-step explanation:

As the name infers, you need the length hypotenuse and the length of one leg of each triangle. This is because you can use Pythagorean to find the last side, turning it into SSS congruence theorem. You also need them both to be right triangles for pythag to work.

Answer:what 2 triangles

Step-by-step explanation:Happy new year btw

The second coordinate of the given first coordinate is determined as;

f(0) = 1 and (1) = 0.7.

The second coordinate of the given first coordinate is calculated by applying the following method as follows;

The given function;

F(x) = 0.7ˣ

The value of f(0) is calculated as;

f (0) = 0.7⁰  = 1

The value of f(1) is calculated as;.

f (1) = 0.7¹ = 0.7

Thus, the second coordinate of the given first coordinate is determined by applying the appropriate substitute of the function as shown above.

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Answer:

First

Step-by-step explanation:

1.

\(\frac{48}{8} + 2^{3} = 6 + 8 = 14\)

\(5 + 3^2 = 5 + 9 = 14\)

2.

\(9^{2} - 7^{2} = 81 - 63 = 18\)

\(\frac{20}{7-2} = \frac{20}{5} = 4\)

3.

\(\frac{150}{5^2} = \frac{150}{25} = 6\)

\(30 - 4^{2} - 12 = 30 - 16 - 12 = 30 - 28 = 2\)

4.

\(\frac{8 - 7}{2} - 12 = 0.5 - 12 = -11.5\)

\(22 - 2 * 3 = 22 - 6 = 16\)

Answer:

first and fourth

Step-by-step explanation:

Equate and compare both sides of the equations. If both sides are equal then the equation is true.

48 ÷ 8 + 2³ = 6 + 8 = 14

right side = 5 + 3² = 5 + 9 = 14

This is a true equation

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

9² - 7² = 81 - 49 = 32

right side = 20 ÷ (7 - 2) = 20 ÷ 5 = 4

This is not a true equation

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

\(\frac{150}{5^2}\) = \(\frac{150}{25}\) = 6

right side = 30 - 4² - 12 = 30 - 16 - 12 = 14 - 12 = 2

This is not a true equation

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

\(\frac{8(7)}{2}\) - 12 = \(\frac{56}{2}\) - 12 = 28 - 12 = 16

right side = 22 - 2 × 3 = 22 - 6 = 16

This is a true equation

The expression (sinx + cosx)^2 + (sinx - cosx)^2 simplifies to

To simplify the expression (sinx + cosx)^2 + (sinx - cosx)^2 using trigonometric identities, we can expand and simplify the expression.

Expanding the squared terms

(sin^2x + 2sinxcosx + cos^2x) + (sin^2x - 2sinxcosx + cos^2x)

Using the trigonometric identity sin^2x + cos^2x = 1, we can simplify further:

(1 + 2sinxcosx + 1) + (1 - 2sinxcosx + 1)

Simplifying the expression, we have:

2 + 2sinxcosx + 2

Combining like terms, we get:

4 + 2sinxcosx

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Answer:

3 landscaping, 3 tutoring

Step-by-step explanation:

This is a system of equations.

Let T = number hours tutoring and L = number hours landscaping.

T + L = 10

137 = 14T + 13L

Now solve the system of equations.

We can rearrange the first equation so that T = 10-L. Substitute that in the 2nd equation.

137=14(10-L) + 13L

137 = 140-14L + 13L

-3=-L

3=L

He worked 3 Landscaping Hours. Substitute back into the original equation to solve for T (tutoring hours).

T+L = 10

T+3 = 10

T = 7.

We worked 7 tutoring hours.

Now double check with the earnings equation.

137 = 14T + 13L

137 = 14*7+ 13*3

137 = 98 + 39

137=137

The answer of the following options are as 50, 64, 36, 40, 100, 9, 12, 12 100, 27, 150 42, 50 72, 28.3.

Suppose the fraction is proper (the numerator is smaller than the denominator).

Let it be

\(\dfrac{a}{b}\)

Then, we can interpret it as:

a parts out of b parts of a thing.

\(1. \dfrac{2}{5} t = 20\\\\t = 20 \times \dfrac{5}{2}\\\\t= 50\)

\(2. \frac{7}{8} p = 56\\\\p = 56 \times \frac{8}{7} \\\\ p= 64\)

\(3. \frac{5}{6} x = 30 \\\\x = 30 \times \frac{6}{5} = 36\)

\(4. \frac{1}{2} x = 20\\\\x = 20 \times 2 = 40\)

\(5. \frac{3}{5} s = 60\\\\s = 60 \times \frac{5}{3} = 100\)

\(6. \frac{1}{3} t = 3 \\\\t = 3\times 3 = 9\)

\(7. \frac{3}{4} x = 9\\\\x = 12\)

\(8. \frac{11}{12} x = 11\\\\x = 11 \times 12/11 = 12\)

\(9. \frac{8}{10} t = 80\\\\t = 80 \times 10/8 = 100\)

\(10. \frac{p}{3} = 9 \\\\p = 9 \times 3 = 27\)

\(11. \frac{n}{5} = 30\\\\n = 30 \times 5 = 150\)

\(12. \frac{6a}{7} = 36 \\\\a = 36 \times 7/6 = 42\)

\(13. \frac{1}{2} t + 3 = 28\\\\t = (28 - 3)2 = 50\)

\(14. \frac{1}{6} r = 12\\\\r = 12\times 6 = 72\)

\(15. \frac{11}{12} b = 32\\ \\b = 32 \times 11/12 = 29.33\)

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The correct value of particle's acceleration at t = 2 seconds is -1/12 m/s^2.

To find the particle's velocity, we need to take the derivative of the position function with respect to time (t).

Given the position function:

s = √24 + 6t

To find the velocity, we differentiate the position function with respect to time:

v = ds/dt

Applying the power rule and chain rule for differentiation, we get:

v = (1/2) * (24 + 6t)^(-1/2) * 6

Simplifying further:

v = 3 / √(24 + 6t)

To find the velocity at t = 2 seconds, we substitute t = 2 into the velocity equation:

v = 3 / √(24 + 6(2))

v = 3 / √(24 + 12)

v = 3 / √36

v = 3 / 6

v = 1/2 m/s

So, the particle's velocity at t = 2 seconds is 1/2 m/s.

Now, let's find the particle's acceleration. Acceleration is the derivative of velocity with respect to time.

a = dv/dt

To find the acceleration, we differentiate the velocity function with respect to time:

a = d(3 / √(24 + 6t)) / dt

Applying the quotient rule and chain rule, we get:

a = -3 * (24 + 6t)^(-3/2) * 6

Simplifying further:

a = -18 / (24 + 6t)^(3/2)

To find the acceleration at t = 2 seconds, we substitute t = 2 into the acceleration equation:

a = -18 / (24 + 6(2))^(3/2)

a = -18 / (24 + 12)^(3/2)

a = -18 / 36^(3/2)

a = -18 / 36^(3/2)

a = -18 / 216

a = -1/12 m/s^2

So, the particle's acceleration at t = 2 seconds is -1/12 m/s^2.

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