Which equations are true?


There is more than one correct answer choice. Select all that apply.


4⋅5m+4⋅7=20m+47


14+21w=7(2+3w)


49r+35=7(7r+35)


9(8h−3)=72h−27


5⋅2+5⋅3t=10+15t


3⋅6f+3⋅11=18f−33

HELP PLZZZZZ

Answer:

95 percent

Step-by-step explanation:

The empirical rule states that approximately 95% of observations will fall within 2 standard deviations of the mean if the population is approximately symmetrical(normal) in distribution.

The interval from 33 to 65 falls within 2 standard deviations of the mean;

49-2(8) = 33

49+2(8) = 65

Thus, 95 percent  of data will fall within the interval from 33 to 65

Answer:

.167 is irrational.

2/9 is rational.

pi is irrational.

sqrt225 is rational.

Step-by-step explanation:

Why .167 is irrational because it is a decimal.

2/9 is rational because it is a fraction.

pi is irrational because it is a repeating decimal that goes on forever.

Why the sqrt225 is ration is because it comes out as a whole number 15 so it is rational.

Answer:

Step-by-step explanation:

i think the first one is ratinol the second one is ratinol the trid one is irratinol and the last one is irratinol hope i get brainlist witch will never happen any way hope this helps

Answer:

6 feet 4 inches

Step-by-step explanation:

Step-by-step explanation:

3 FEET 2 INCHES These are not the same! Do not multiply

Each foot is 12 inches. So 3 times 12 (3 feet) is 36, add the extra 2 inches for 38 inches.

38 plus 32 equals 70 total inches. NOw we put it back into feet.

70 divided by 12 is 5, remainder 10.

So Valerie's sister will be 5 feet 10 inches (G)

Answer: The correct answer is A.

Step-by-step explanation: Based on Mia’s data, she found that there was a relationship between the length of a persons foot and their shoe size. The only valid conclusion in the options is choice a. The length of a persons foot is a cause of their shoe size, which implies that there is also a correlation between the length of a person’s foot and their shoe size.

the answer is a.cause a function is a mapping from a set of input to the output

Answer:

The answer is D

Step-by-step explanation:

all you have to do is trace the triangle and see/.

The correct answer is D my baby

Answer:

Toss

Step-by-step explanation:

I just did the problem.

Convert 1 3/5 to an improper fraction;

-1 × 5 + 3/5 ÷ -2/3

Simplify 1 × 5 to 5

-5 + 3/5 ÷ -2/3

Simplify 5 + 3 to 8

-8/5 ÷ -2/3

Use this rule: a ÷ b/c = a × c/b

-8/5 × 3/-2

Use this rule; a/b × c/d = ac/bd

-8 × 3/5 × - 2

Simplify 8 × 3 to 24

-24/5 × -2

Simplify 5 × -2 to -10

- 24/-10

Move the negative sing to the left

-(-24/10)

Simplify 24/10 to 12/5

-(-12/5)

Simplify brackets

12/5

Convert to a mixed fraction

= 2 2/5

Answer:

Step-by-step explanation:

[tex]3.1^4=(3.1)(3.1)(3.1)(3.1)\to\boxed{A}\\\\3.1^4=[(3.1)(3.1)](3.1)(3.1)=(9.61)(3.1)(3.1)\to\boxed{B}\\\\3.1^4=[(3.1)(3.1)][(3.1)(3.1)]=(9.61)(9.61)\to\boxed{D}[/tex]

Equivalent expressions to 3.1⁴ involve raising 3.1 to the power of 4. This means 3.1 is multiplied by itself four times, not three times (which would be cubing). The equivalent expression would result from multiplying 3.1 by itself four times.

The equivalent expressions to 3.1⁴ involve the operation of raising a number to a power. In this case following the number 3.1, the exponent of 4 means that 3.1 is being multiplied by itself four times, and it is not the same as cubing. The cubing of exponentials refers to the process of raising a number to the power of three or multiplying the number by itself three times. The commutative, associative, and distributive laws can be applied to simplify and rewrite exponential expressions. Therefore, to find an equivalent expression for 3.1⁴, you would need to multiply 3.1 by itself four times.

https://brainly.com/question/239851

#SPJ3

Answer:

Step-by-step explanation:

Zucchini    = 'z' = 6

Beans = 'b' = 3

Corn = 'c' = 7

beets = 't' = 4

Total produce = 20 bushels of veggies.

z = 6/20 = 3/10                 % = 3/10*100 = 30%

b = 3/20                            % = 3/20 * 100 = 15%

c = 7/20                             % = 7/20 *100 = 35%

t = 4/20 = 1/5                     % = 1/5 * 100 = 20%

Total                                                          100%

Since distance is equal to rate times time:

Let x= the time traveled at 3 km/h

Let y= the time traveled at 4 km/h

We can say that

3x+4y=52

Or that three (kilometers) times the time traveled at 3 kilometers an hour plus 4 (kilometers) times the time traveled at 4 kilometers an hour is equal to 52; the total distance traveled.

Likewise, we can see that:

x+y=15

Because x, the number of hours traveled at 3 km/h added to y, the time traveled at 4 km/h is equal to 15; the total time traveled.

Now, I'll solve by substitution.

x=-y+15

Substitute that into the other equation.

3(-y+15) + 4y = 52

Distribute

-3y + 45 + 4y = 52

Combine like terms

y + 45 = 52

Minus 45 from both sides

y = 7

So Fredrick traveled at 4 km/h for 7 hours.

Now, to find the other value, substitute the value of y into one of the original equations.

x + 7 = 15

Minus 7

x = 8

So

Time traveled at 4 km/h = 7 hours

Time traveled at 3 km/h = 8 hoursSince distance is equal to rate times time:

Let x= the time traveled at 3 km/h

Let y= the time traveled at 4 km/h

We can say that

3x+4y=52

Or that three (kilometers) times the time traveled at 3 kilometers an hour plus 4 (kilometers) times the time traveled at 4 kilometers an hour is equal to 52; the total distance traveled.

Likewise, we can see that:

x+y=15

Because x, the number of hours traveled at 3 km/h added to y, the time traveled at 4 km/h is equal to 15; the total time traveled.

Now, I'll solve by substitution.

x=-y+15

Substitute that into the other equation.

3(-y+15) + 4y = 52

Distribute

-3y + 45 + 4y = 52

Combine like terms

y + 45 = 52

Minus 45 from both sides

y = 7

So Fredrick traveled at 4 km/h for 7 hours.

Now, to find the other value, substitute the value of y into one of the original equations.

x + 7 = 15

Minus 7

x = 8

So

Time traveled at 4 km/h = 7 hours

Time traveled at 3 km/h = 8 hours

Answer:

C

Step-by-step explanation:

The area (A) of the triangle is calculated using

A = [tex]\frac{1}{2}[/tex] ab sinC

where a, b are the 2 sides and C is the angle between them

here a = 6, b = 2 and C = 80°, hence

A = 0.5 × 6 × 2 × sin80° = 5.91 cm² → C

Answer:

2

Step-by-step explanation:

If g(x) is the inverse of f(x)

f(g(x)) =x

This is the property of inverses.

Let x=2

f(g(2))=2

Answer:

C: 2

Step-by-step explanation:

its right on edg 2020

Answer:

6 rows

Step-by-step explanation:

How many boxes will be in the row ?

5+1=6

five rows

one more added to that same row

add u get six

Answer:

6 boxes.

Step-by-step explanation:

If another row is added to the bottom of the stack, how many boxes will be in the row. The stack consists of five rows of boxes that are all the same size.

5 + 1 = 6 boxes.

Answer:

8x³ - 5x² + 8x

Step-by-step explanation:

to solve the perimeter, you need to add all sides of the triangle together.

8x² + x³ + 2x² + 7x³ - 3x² + 6x

now, code all the similar variables:

8x² + x³ + 2x + 7x³ - 3x² + 6x

8x² - 3x² = 5x²

x³ + 7x³ = 8x³

2x + 6x = 8x

so, put them all together:

5x² + 8x³ + 8x

but remember that the larger exponent comes first(just a rule)

so, it is : 8x³ - 5x² + 8x

plz give me a brainliesttt

Answer:

Where is the answer choices?

Step-by-step explanation:

Answer:

[tex]\large\boxed{m=-\dfrac{5}{6}}[/tex]

Step-by-step explanation:

The formula of a slope:

[tex]m=\dfrac{y_2-y_1}{x_2-x_1}[/tex]

We have the points (-19, 1) and (-1, -14). Substitute:

[tex]m=\dfrac{-14-1}{-1-(-19)}=\dfrac{-15}{18}=-\dfrac{15}{18}=-\dfrac{5}{6}[/tex]

Answer:

Its A

Step-by-step explanation:

Answer:

Pie is a complex number?

Step-by-step explanation:

3.14159265358979323846264338327950288419716939937510582097494459230781640628..............................

Answer:

2 + 3i is a complex number

Step-by-step explanation:

a complex number is a number of the form a + bi, where a and b are real numbers and i is an indeterminate satisfying i2 = −1. For example, 2 + 3i is a complex number.

Answer:

are perpendicular

Yes, it is perpendicular

Parallel is when you have two lines that do not intersect

A ray is a line that has one definite starting point and no obvious end point. (Stars with a point and "ends" with an arrow, meaning that it goes on "forever")

A line is just one specific line

When you have perpendicular, that is when two lines cross each other forming a right angle as you may now know

Hope this helps :)

Answer:

Step-by-step explanation:

[tex]\text{The formula of an area of a circle:}\\\\A=\pi r^2\\\\r-\text{radius}\\\\\text{We have}\ A=4\pi x^2+12\pi x+9\pi=(4x^2+12x+9)\pi=(2^2x^2+2(2x)(3)+3^2)\pi\\\\=\bigg((2x)^2+2(2x)(3)+3^2\bigg)\pi\qquad\text{use}\ (a+b)^2=a^2+2ab+b^2\\\\=(2x+3)^2\pi\to r=2x+3[/tex]

Answer:

3x^2 + 6y - 9x +4

Step-by-step explanation:

[tex] - {x}^{2} + 10x + 5 \\ = - {x}^{2} + 10x - 25 + 5 + 25 \\ = - ( {x}^{2} - 10x + 25) + 30 \\ = \underbrace{ - {(x - 5)}^{2}}_{\leqslant 0} + 30 \\ \Rightarrow - {(x - 5)}^{2} + 30 \leqslant 30 \\ \Rightarrow Maximum \: value \: is \: 30 \: when \: x = 5[/tex]

Answer: C) $1951.53

Step-by-step explanation:

[tex]A=P(1+r)^{t}[/tex]

A=1500(1+0.068)⁴

  = 1500(1.068)⁴

  = 1951.53

Answer:

1) 1.8 round to tenths

Step-by-step explanation:

To find the mean absolute deviation we follow these steps:

1) 4,5,10,8,4,8,7,6

step 1

4+5+10+8+4+8+7+6 / 8 = 6.5

Mean (μ): 6.5

step 2

|4-6.5| + |5-6.5| + |10-6.5| + |8-6.5| + |4-6.5| + |8-6.5| +|7-6.5| + |6-6.5|  = 14

step 3

14 / 8 = 1.75  

Repeat these steps for other parts.

[tex]\bf \textit{sum of all interior angles in a regular polygon}\\\\ n\theta =180(n-2)~~ \begin{cases} n=\textit{number of sides}\\ \theta =angle~in\\ \qquad degrees\\[-0.5em] \hrulefill\\ n=9 \end{cases}\implies 9\theta =180(9-2) \\\\\\ 9\theta =1260\implies \theta =\cfrac{1260}{9}\implies \theta =140[/tex]

Answer: 4x-5

Step-by-step explanation: g(f(x))

g(4x-3)

4x-3-2

4x-5

Answer:Hmmmmmmm

Step-by-step explanation:

i really hope i can help

Answer:

The correct option is D.card 4

Step-by-step explanation:

Consider the provided graph.

The introductory APR is a discounted interest rate which credit card companies frequently give new customers after opening an account for a fixed number of months. Most credit cards on payments, balance transfers or both offer discounted APRs.

The graph of card 4 is showing that the interest rate in Jan to Apr was lower, after Apr the interest rate increase with different slope.

Therefore, the correct option is D.card 4

Answer:

Card 4 i think

Step-by-step explanation:

the correct answer is the 3rd table.