Number sense is an important concept for young for young children to know because it provides a foundation for understanding arithmetic.
a. true
b. false

Answer:

sin 2x + cos x =  2 sin x cos x + cos x = (2 sin x + 1)cos x

Step-by-step explanation:

Given the expression: sin 2x + cos x,

then we can use the formula: sin 2x = 2 sin x cos x, which gives:

sin 2x + cos x =  2 sin x cos x + cos x = (2 sin x + 1)cos x

So there you have two expressions in terms of sin x and cos x, as requested. :D

Answer:

if there's a graph for f(x):

if you're given a graph it means that at the x-coordinate x=1 the corresponding y-value is y=7. Another way to think of this is it's giving you the ordered pair. f(x-value) = y-value which gives you (x,y).

if there's an equation for f(x):

if you're given an equation, you're still looking to find the y-value but instead of looking on a graph, you're plugging 1 in for x in the equation which, after solving the equation, will equal 7.

basically, at x=1, the y-coordinate is 7

Answer: C.) Earthquakes

Answer:

58080

Step-by-step explanation:

You just have to multiply it by 5280. So, 11*5280 is 58080. The answer is 58080.

The units for the composite function s(w(h)) is bracelets over a week when the function s(t) approximates how many bangles Margaret makes per hour and the function w(h) represents how many hours per week Margaret spends making the bracelets.

To define the unit of the composite function s(w(h)), we first need to find the units of the functions s(t) and w(h).

The function s(t)  represents the number of bangles per hour, so its unit will be bangles over an hour.

The function w(h) represents the hours per week spent on making the bracelets, so its unit will be hours over a week.

Now, we can define the unit of the composite function s(w(h)).

To find the unit of the composite function we follow these steps:-

s(w(h)),

= s(hours over a week) {replacing the function w(h) by its units},

= (bangles over an hour(hours over a week)) {replacing the function s(t) with its units},

= bangles over a week {Simplifying}.

Thus, the units for the composite function s(w(h)) is bracelets over a week when the function s(t) approximates how many bangles Margaret makes per hour and the function w(h) represents how many hours per week Margaret spends making the bracelets.

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The statement that linear pairs of angles are always adjacent is true.

What are Linear Pairs?

The pair of angles formed when two lines intersect each other at a point,  are called Linear Pairs, the angles formed are adjacent to each other and they share a common arm.

It is asked in the question that linear pairs of angles are always adjacent and the answer is yes, it is a true statement as they have a common arm and an uncommon arm, the sum of the angles is equal to 180 degrees.

Hence, the statement that linear pairs of angles are always adjacent is true.

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Answer:

Step-by-step explanation:

Answer:Given

a can do a piece of work = 40 days

so, A's 1 day work =1/4

so, A's 8 day's work =8/40=1/5

remaining work = 1- 1/5= 4/5

Now, B can do  4/5  piece of work in =16 days

So, B’s 1 day's work = (4/5) /16= 4/ 5x6=1/20

Therefore, (A+B)’s 1 day's work = 1/40+1/20 =

1+2/40=3/40

∴   Both (A+B) can do a piece of work in =

1/days (3/40) = 40/3 days

= 13 1/3 days

Answer:

slope = 8

Step-by-step explanation:

calculate the slope m using the slope formula

m = [tex]\frac{y_{2}-y_{1} }{x_{2}-x_{1} }[/tex]

with (x₁, y₁ ) = (- 3, - 8) and (x₂, y₂ ) = (2, 32) ← 2 ordered pairs from the table

note any pair of ordered pairs will give the slope

m = [tex]\frac{32-(-8)}{2-(-3)}[/tex] = [tex]\frac{32+8}{2+3}[/tex] = [tex]\frac{40}{5}[/tex] = 8

The equivalent equation of 4y – 1 = 15 is 20x - 13 = 15

The equations are given as:

4y – 1 = 15 and y = 5x – 3.

Substitute y = 5x – 3. in 4y – 1 = 15

4(5x – 3) – 1 = 15

Expand

20x- 12 - 1 = 15

Evaluate the like terms

20x - 13 = 15

Hence, the equivalent equation of 4y – 1 = 15 is 20x - 13 = 15

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Hello,

Answer:

The next number is 35 585

Step-by-step explanation:

3 × 5 - 3 = 12

5 × 12 - 5 = 55

12 × 55 -12 = 648

55 × 648 - 12 = 35 585

The next number for the given series is 35,585.

A number series is a number-based sequence. In the number series questions, we must identify the rules that lead to the formation of a number series. These series vary in nature, as do the questions that may arise from them.

Given that the series is 3,5,12,55,648. The next number will be calculated by decoding the series as below,

3 × 5 - 3 = 12

5 × 12 - 5 = 55

12 × 55 -12 = 648

55 × 648 - 12 = 35,585

Therefore, the value of the next number for the series is 35,585.

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Answer:

[tex]x^{\frac{5}{3}} y^{\frac{1}{3} }[/tex]

Step-by-step explanation:

[tex]\sqrt[3]{x^{5} y}[/tex] = [tex]x^{\frac{5}{3}} y^{\frac{1}{3} }[/tex]

Answer:

(a)  -1

(b)  4

(c)  14

(d)  61

Step-by-step explanation:

A piecewise function is a function which has different definitions for different intervals of x.

Given:

[tex]f(x)=\begin{cases}5x-1 \quad \textsf{if }-5\leq x \leq 3\\x^3-3 \quad \textsf{if }\:\:\:\:\:\:3 < x \leq 4\end{cases}[/tex]

f(x) has 2 definitions:

Definition 1

[tex]5x-1[/tex] when x is more than or equal to -5 and less than or equal to 3.  This is a linear function.

Definition 2

[tex]x^2-3[/tex] when x is more than 3 and less than or equal to 4.  This is a cubic function.

Part (a)

We have to find f(0), so when x = 0.

x = 0 satisfies the condition -5 ≤ x ≤ 3 so the corresponding function is

[tex]f(x)=5x-1[/tex]

Substitute x = 0 in this definition:

[tex]\implies f(0)=5(0)-1=-1[/tex]

Part (b)

We have to find f(1), so when x = 1.

x = 1 satisfies the condition -5 ≤ x ≤ 3 so the corresponding function is

[tex]f(x)=5x-1[/tex]

Substitute x = 1 in this definition:

[tex]\implies f(0)=5(1)-1=4[/tex]

Part (c)

We have to find f(3), so when x = 3.

x = 3 satisfies the condition -5 ≤ x ≤ 3 so the corresponding function is

[tex]f(x)=5x-1[/tex]

Substitute x = 3 in this definition:

[tex]\implies f(0)=5(3)-1=14[/tex]

Part (d)

We have to find f(4), so when x = 4.

x = 4 satisfies the condition 3 < x ≤ 4 so the corresponding function is

[tex]f(x)=x^3-3[/tex]

Substitute x = 4 in this definition:

[tex]\implies f(4)=(4)^3-3=61[/tex]

Answer:

51

Step-by-step explanation:

arrange in ascending order

48,49,50,52 54,62

number of terms=6

median=(3rd term+4th term)/2=(50+52)/2=102/2=51

Answer:

51

Step-by-step explanation:

Hope it helps

Step-by-step explanation:

Answer:

3/4

Step-by-step explanation:

A: students present
B: students on time

P(all students present and on time) = P(A and B) = 3/10
P(all students present) = P(A) = 2/5

P(A and B) = P(A).P(B|A) where P(B|A) is the probability of everyone being on time given that everyone is present

So P(B|A) = P(A and B) /P(A) = 3/10 ÷ 2/5 = 3/10 * 5/2 = 15/20 which can be reduced to 3/4 by dividing numerator and denominator by 5

Answer:

Step-by-step explanation:

The total amount of interest earned is the sum of the amounts of interest earned by each of the accounts.

Let x represent the amount invested at 8%. Then 2x is the amount invested at the lower rate of 6%. The interest earned by each investment is the product of the amount and the interest rate. The total earned is ...

  0.08x +0.06(2x) = 2920

We can simplify this equation, then divide by the x-coefficient.

  0.20x = 2920 . . . . . . . . . . . simplify

  x = 14600 . . . . . . . . . . divide by 0.2

  2x = 29200 . . . . . . . . multiply by 2

Jolene invested $29,200 at 6%, and $14,600 at 8%.

Answer:

There are 8 black marbles.

Step-by-step explanation:

First, set up your equation. You have black (b) and white (w) marbles, total of 30, so those will be your variables to set in your equation.

w + b = 30

You mentioned that there are 14 more white marbles then black. Therefore, white marbles will have b many marbles + 14, creating the equation:

w= b + 14

If w = b + 14 and w can be easily substituted in the first equation, substitute w for b + 14. This will result in having the equation of:

(b +14) + b= 30

Simplify this equation, combine like terms to break down the equation, making it easier for you to solve for b.

-Subtract 14 from both sides.

-Add b + b = 2b

Then, you will have your resulting equation in which you divided 2 from both sides to get b by itself.

2b = 16

b=8

There are 8 black marbles.

Answer:

The value of x =2 and y= 2, because they are congruent and 2+2=4

Answer:

The value of x =2 and y= 2, because they are congruent and 2+2=4

Step-by-step explanation:

hope this helps :)

According to the AA similarity theorem, the statement that must be true is: D. ∠Z ≅ ∠W and ∠X ≅ ∠U.

The AA similarity theorem states that if two angles in one triangle is congruent to two corresponding angles in another triangle, then both triangles are similar.

For △ZYX ~ △WVU, any two pairs of corresponding angles must be congruent.

Therefore, the statement that must be true based on the AA similarity theorem is: D. ∠Z ≅ ∠W and ∠X ≅ ∠U.

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The mean of the data set is 42.

The arithmetic mean is found by adding the numbers and dividing the sum by the number of numbers in the list.

Given:

20, 32, 34, 36, 40, 42, 44, 48, 55, 65

Mean = 20+32+ 34+ 36+ 40+ 42+ 44+ 48+ 55+ 65/10

Mean = 416 / 10

Mean = 41.6

Mean = 42

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Answer:

x=-5.25

Step-by-step explanation:

Original equation:

[tex]2(3-x)-1.4(5-2x)=2x+5.3[/tex]

Distribute:

[tex]6-2x-7+2.8x=2x+5.3[/tex]

Group like terms:

[tex](6-7)+(2.8x-2x)=2x+5.3[/tex]

Add like terms:

[tex]-1+0.8x=2x+5.3[/tex]

Add 1 to both sides

[tex]0.8x=2x+6.3[/tex]

Subtract 2x from both sides

[tex]-1.2x=6.3[/tex]

Divide both sides by -1.2

[tex]x=-5.25[/tex]

Answer:

$2.29

Step-by-step explanation:

$270 + 27% = $270 + (270 * 0.27)

                    = $270 + 72.9

                    = $342.9

$342.9 was the total selling price, but there are 150 articles.

$342.9 / 150 = $2.286

                     = $2.29 (Currency is rounded to two decimal places)

Based on the sales made by Micro Sales on bank credit cards, the journal entries would be:

Date               Account Title                                        Debit               Credit

March 4          Cash                                                 $13,095

                      Card Service expense                     $   405

                       Sales Revenue                                                         $13,500

The cash account will be debited with:

= 13,500 x (1 - 3%)

= $13,095

The Card service expense is:

= 13,500 x 3%

= $405

Sales revenue will be credited by the amount of sales which is $13,500.

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Answer:

Domain: (-infinity, infinity)

Range: [10, infinity)

Step-by-step explanation:

So the domain is easy to determine, because the only reason the domain would be restricted is in like logarithmic equations, radical equations, etc... So in this case the domain is all real number (-infinity, infinity) or all real numbers.

The range of this function is a bit different since it's an absolute function, so  when the value inside the absolute values goes from -infinity to 0, it's actually decreasing, despite the value technically increasing. But there is a x-5 and that actually doesn't change the range, it simply shifts it to the right by 5 units, so the vertex is there, because that's when the value inside of it goes from being a negative to a positive number. the +10 does change the range, because normally an absolute value function has a vertex at (0, 0) and in this case it's slightly different since it has a vertex when x=5 since the x has 5 subtracted from it. But the +10 is moving that up. Since the lowest value of the absolute value will be 0, any negative number becomes positive. So the vertex is shifted up 10 units, thus the range is [10, infinity)

Hello,

Step-by-step explanation:

6/7 ≈ 0,857

we have 4/4 = 1 and 3/4 = 0,75

| 0,75 - 0,857| = 0,107

| 1 - 0,857 | = 0,143

→ Answer is 3/4

Answer:

the bench mark is 1/4 and the lower range is 3/4.

Step-by-step explanation:

Estimate the fraction 6/7 using 1/4 as our benchmark: Display the fraction bar for 6/7 The lower range is 3/4 and the upper range is 1

When we Simplify [(x^2)^3 × 5x] / [6x^2 × 15x^3], the result obtained is (1/18)x^2

[(x^2)^3 × 5x] / [6x^2 × 15x^3]

Recall

(M^a)^b = M^ab

Thus,

(x^2)^3 = x^6

Recall

M^a × M^b = M^(a+b)

Thus,

x^6 × 5x = 5x^(6 + 1) = 5x^7

6x^2 × 15x^3] = (6×15)x^(2 + 3) = 90x^5

Recall

M^a ÷ M^b = M^(a - b)

Thus,

5x^7 ÷ 90x^5 = (5÷90)x^(7 - 5) = (1/18)x^2

Therefore,

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Answer: a rectangle

Step-by-step explanation:

If you graph the points out you will see that it is four points high and six points wide

Answer:

It is A.Rectangle. from the given points.

Step-by-step explanation:

the graph is given in the image.

I hope it to be helpful ^=^

The inequality that represents the given graph is: D. y ≥ 2/3x + 2.

Using two points on the line, (0, 2) and (-3, 0), find the slope (m).

Slope (m) = change in y / change in x

Slope (m) = (2 - 0)/(0 - (-3))

Slope (m) = 2/3

The y-intercept (b) is the y-value of the point where the line intercepts the y-axis = 2.

Substitute m = 2/3 and b = 2 into y ≥ mx + b:

y ≥ 2/3x + 2

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