Lana completes 6 math problems in 15 minutes. How long will it take her to complete 10 problems?

Answer:

C. density = mass / volume

Step-by-step explanation:

Answer:

a = 60° or π/3

Step-by-step explanation:

Given :-

sin² a/2 - sin a/2 + 1/4

To find :-

a

Solving :-

sin² a/2 - sin a/2 + 1/4 = (sin a/2 - 1/2)² = 0

sin a/2 - 1/2 = 0

sin a/2 = 1/2

a/2 = 30°

Solution :-

a = 60° or π/3

Answer:

1, 0

Step-by-step explanation:

Let [tex]\cos (x+2\pi) = -\frac{\sqrt{2}}{2}[/tex]. From Trigonometry we remember the following identity:

[tex]\cos (a+b) = \cos a \cdot \cos b - \sin a \cdot \sin b[/tex] (Eq. 1)

Where [tex]a[/tex] and [tex]b[/tex]  are angles measured in radians.

Then, we proceed to expand the given expression:

[tex]\cos x \cdot \cos 2\pi - \sin x \cdot \sin 2\pi = -\frac{\sqrt{2}}{2}[/tex]

[tex]\cos x \cdot 1 - \sin x \cdot 0 = -\frac{\sqrt{2}}{2}[/tex]

[tex]\cos x = -\frac{\sqrt{2}}{2}[/tex]

Therefore, correct answer is "1, 0".

Answer:

A 1;0

Step-by-step explanation:

Answer:

P (rosemary) = 9/19

Step-by-step explanation:

Given :-

To Find :-

Solving :-

Answer:

twelve twenty four thirty two lol

Population is like superset of sample. The population and sample for this case are:

The difference between population and sample is that sample is taken from the population.

We do sampling so that we don't have to work on entire population of items but only on that sample in a way that we can predict information about population.

Most of the times, it isn't possible in real world to work on entire populations. Samples come out for rescue by assumptions that they will have some properties of the population pertained in them.

Thus, the sample should be taken out such that it includes data of the population as much  as it can in unbiased way so as to imitate population.

For this case, we have:

75 students were randomly selected from the junior class at a high school.

Since 75 students were selected from junior class, thus:

Learn more about sampling here:

https://brainly.com/question/24842573

Answer:

Step-by-step explanation: second part is 15-55

Answer:

10.25

Step-by-step explanation:

4x+1=42

42-1=41

4x=41/4

x=10.25

Answer:

41/4 or 10.25

Step-by-step explanation:

4x=42‒1

4x=41

4x/4=41/4

x=10.25

i think it is easy &it helps you

Answer:

x=4

Step-by-step explanation:

I explained the answer to the question in the photo

Answer:

-18

Step-by-step explanation:

Answer:

-18

Step-by-step explanation:

Answer:

= x^2 -9x-3x+27

= x (x-9) -3 (x-9)

= (x-3) (x-9)

Answer:

B

Step-by-step explanation:

1/2=20 * t

t=1/2 * 1/20

t=1/40

Brainliest pleasr

Answer:

multiply by 12 and would serve 18 people

Step-by-step explanation:

I did a test for it

Answer:

We multiplied the original recipe by 3/2 or 1 1/2, the new recipe will serve 18 people.

Step-by-step explanation:

to get 1 to 3 you multiply it by 3 and to get 4 to 8 you multiply it by 2 so you end up with 3/2 or 1 1/2

Answer:

the simplest form of this expression is 10+4x

The dot on the number line, that Craig says shows a value of one third

is halfway between 0 and one half which is one quarter therefore;

A possible number line obtained from a similar question posted on a

website online is attached;

From the attached drawing, we have, that the half-way marking between

1 and 0 is 2/3, and the half way between 0 and 2/3 is 1/3. However, half

between 0, and 1 is 1/2

Therefore, the half-way marking should be 1/2 rather than 2/3

Which gives;

Learn more about distances on the number line here;

https://brainly.com/question/11295918

Answer:

the answer is d

Step-by-step explanation:

Answer:

w=-8

Step-by-step explanation:

Step 1: Simplify both sides of the equation.

39−12w=7−16w

39+−12w=7+−16w

−12w+39=−16w+7

Step 2: Add 16w to both sides.

−12w+39+16w=−16w+7+16w

4w+39=7

Step 3: Subtract 39 from both sides.

4w+39−39=7−39

4w=−32

Step 4: Divide both sides by 4.

4w/4=-32/4

The answer is "C" -- 1/7

Step-by-step explanation:

Because 4 of the 28 kids in her class chose animated and 4/28 simplified is 1/7.

Answer:

34

Step-by-step explanation:

34*34=(30+4)^2=900+16+240=1156

Answer:

5

Step-by-step explanation:

Answer:

[tex]k=6, k=-1[/tex]

Step-by-step explanation:

                         [tex]\dfrac{k+3}{3}-\dfrac{2}{k-5}=1[/tex]

[tex]\implies \dfrac{(k+3)(k-5)}{3(k-5)}-\dfrac{3 \cdot 2}{3(k-5)}=1[/tex]

[tex]\implies \dfrac{k^2-2k-15-6}{3(k-5)}=1[/tex]

[tex]\implies k^2-2k-21=3k-15[/tex]

[tex]\implies k^2-5k-6=0[/tex]

[tex]\implies (k-6)(k+1)=0[/tex]

[tex]\implies k=6, k=-1[/tex]

Answer: B in 4 - 2 in x + 5 in y

Step-by-step explanation:

Answer:

Could you comment to this with the question i could easily use a calculator to find it for you sorry im a tad bit lasy about copying down from a image

Step-by-step explanation:

Answer:

Step-by-step explanation:

x=4

Answer:

x=4

Step-by-step explanation:

x-10= -6

 +10 +10

x   =   4

Answer:

$11,000 = 1404.7yuan

Step-by-step explanation:

$1 = 0.1277 yuan (multiply both sides by 11,000)

$1 × 11,000 = 0.1277 × 11,000 yuan

$11,000 = 1404.7 yuan

Answer:

√74

Step-by-step explanation:

We know the pythagorian triplet that,

A^2 + B^2 = Hypotenuse^2

Or, 5^2 + 7^2 =Hypotenuse ^2

Or, 25+49= Hypotenuse^2

Or, 74 = Hypotenuse^2

Hypotenuse= √74

Hope it helps

Mark me brainliest.

The expression which is equal to the m times, m times, m times, m times, m rewritten in exponential form as,

[tex]m^5[/tex]

The exponent or power of a number represent the multiplication of the that number to the power times.

Let suppose a number 2 has the power 2. Then it will be equal to,

[tex]2^2=2\times2[/tex]

Similarly, 3 times of number 2 equal to the number 2 with exponent 3.

[tex]2\times2\times2=2^3[/tex]

The expression is m times, m times, m times, m times, m. It can be written as,

[tex]m\times m\times m\times m\times m\\[/tex]

The number m is total 5 time multiply by itself. Thus, the exponential form of the above equation is,

[tex]m^5[/tex]

The expression which is equal to the m times, m times, m times, m times, m rewritten in exponential form as,

[tex]m^5[/tex]

Learn more about the exponents power here;

https://brainly.com/question/18324331

Answer: M5 is the correct answer or A

Step-by-step explanation:

Answer:

(x +13)(x + 2)

Step-by-step explanation:

Sum = 15

Product = 26

Factors = 2 , 13

When we add the factors , we get 15 ( 13 +2 = 15)

When we multiply 2 and 13, we get 26 (13*2 = 26)

x² + 15x + 26 = x² + 13x +2x  + 26

                     =x(x + 13) + 2(x + 13)

                      = (x +13)(x + 2)

So far as to attempt this question we can do either it by factorisation method by creating factors OR by splitting middle term method.

[tex]\mapsto\sf{ {x}^{2} + 15x + 26}[/tex]

Splitting middle term 15x in terms of 13x and 2x gives their sum to 15x and their product is equal to 26.

[tex]\mapsto\sf{ {x}^{2} + 13x + 2x + 26 = 0}[/tex]

[tex]\mapsto\sf{x(x + 13) + 2(x + 13)} = 0[/tex]

[tex]\mapsto\sf{(x + 2)(x + 13) = 0}[/tex]

CASE 1:

[tex]\mapsto\sf{x + 2 = 0}[/tex]

CASE 2:

[tex]\mapsto\sf{x + 13 = 0}[/tex]

Thus,

[tex]\sf{ \therefore \: ( {x}^{2} + 15x + 26) = (x + 2)(x + 13)}[/tex]

PS: (Factorisation method is been resolved in attachment)