A dolphin swam 712 miles in 38 hour. What was its average speed in miles per hour (mph)?

Answer:

As,

5x - 2 + 5x - 2 + 3x + 1 = 13x - 3 = 42

But here,

13x - 2 which is not equal to 13x - 3

Hence, it's wrong.

As,

5x - 2 + 5x - 2 + 3x + 1 = (10x - 4) + (3x + 1) = 42

But here,

(10x - 2) + (3x + 1) which is not equal to (10x - 4) + (3x + 1)

Hence, it's wrong.

As,

5x - 2 + 5x - 2 + 3x + 1 = 2(5x - 2) + 3x + 1 = 42

But here,

2(5x-2)+2(3x+1) which is not equal to 2(5x - 2) + 3x + 1

Hence, it's wrong.

As,

5x - 2 + 5x - 2 + 3x + 1 = 42

Also,

5x-2+3x+1+5x-2 equal to 5x-2+3x+1+5x-2

Hence, it's correct.

Answer:

A and D is right

Step-by-step explanation:

I did the quiz and use the answer and it was right

Answer:

31 and 7/8

Step-by-step explanation:

A=BH    12.75*2.5 = 31.875  

7/8=0.875

31 is whole number. so 31 and 7/8

Answer:

EF=10

Step-by-step explanation:

If they are corresponding,

AB = 2 x Scale factor of 5 = 10

Answer: the answer is 10 trust me.

Answer:

2^3·2^2 = 2^3+2 = 2^5  

Step-by-step explanation:

Diego was trying to write 2^3 · 2^2

He wrote  2^3·2^2 = 2^3*2 = 2^6  

But this is wrong because when bases are same exponents are added.

This is the law of exponents.

The correct form would be

2^3·2^2 = 2^3+2 = 2^5  

For understanding it better we can write it like this

2^3·2^2 =

There are 3 two and 2 twos .When totaled there are 5 two not 6 twos.

Answer:

The answer is 1.2 or 5

Step-by-step explanation:

Answer:

B,D,E

Step-by-step explanation:

Answer:

225

Step-by-step explanation:

3 out of 5 is .6 is u multiply .6 by 375 you get 225

Answer:

225

Step-by-step explanation:

Answer:

140

Step-by-step explanation:

the sum of angles of any quad is 360

Answer:

the probability of rolling 6 is 16 or 16.7%.

the probability of rolling 7 is 0.

Step-by-step explanation:

7 is 0 because its impossible to roll a 7 on one number cube.

Answer:

72.18°

Step-by-step explanation:

SOHCAHTOA

Sine = Opposite / Hypotenuse

Cosine = Adjacent / Hypotenuse

Tangent = Opposite / Adjacent

There is the opposite side from angle x, which is 28.

And there is the adjacent side, which is 19.

so: tanx = 28 / 19

Solve by using the inverse function on the calculator (usually shift/second and tan button):

[tex]tan^{-1}(\frac{28}{9})=x=72.18111109[/tex] degrees

9514 1404 393

Answer:

  -31/15

Step-by-step explanation:

Put the numbers in the expression and do the arithmetic.

  [tex]c-4x=-\dfrac{7}{15}-4\cdot\dfrac{2}{5}=-\left(\dfrac{7}{15}+\dfrac{8}{5}\right)\\\\=-\left(\dfrac{7}{15}+\dfrac{24}{15}\right)=\boxed{-\dfrac{31}{15}}[/tex]

__

Your graphing calculator can probably help with this.

Step-by-step explanation:

hope this help you more..

)

Answer:

1/2

Step-by-step explanation:

2/3 x 5/6 = 10/18

10/18 divided by 10/9  —————- > 10/ 18 times 9/10=90/180

(You switch up 10/9 into a multiplication equation)

90/180=1/2

Therefore,  2/3 x 5/6 divided by 10/9= 1/2

Answer:

x=3, y=2

Step-by-step explanation:

we substitute 4x in the first equation by it's equivalent in the second equation:

2y + 8 + 3y =18

5y = 10

y=2

we substitute y in the second equation:

4x= 8+4

x=12/4

X=3

The solutions of the equations is

The value of x = 3

The value of y = 2

What is an Equation?

Equations are mathematical statements with two algebraic expressions flanking the equals (=) sign on either side.

It demonstrates the equality of the relationship between the expressions printed on the left and right sides.

Coefficients, variables, operators, constants, terms, expressions, and the equal to sign are some of the components of an equation. The "=" sign and terms on both sides must always be present when writing an equation.

Given data ,

Let the first equation be A

The value of A is

4x + 3y = 18   be equation (1)

Let the second equation be B

The value of B is

4x = 8 + 2y   be equation (2)

On simplifying the equations , we get

Substitute the value of 4x from equation (2) in equation (1) , we get

( 8 + 2y ) + 3y = 18

8 + 2y + 3y = 18

8 + 5y = 18

Subtracting 8 on both sides of the equation , we get

5y = 18 - 10

5y = 10

Divide by 5 on both sides of the equation , we get

y = 2

So , the value of y is 2

Substitute the value of y in equation (2) , we get

4x = 8 + 2y

4x = 8 + 4

4x = 12

Divide by 4 on both sides of the equation , we get

x = 3

Hence , the value of x and y from the equations are 3 and 2 respectively

To learn more about equations click :

https://brainly.com/question/19297665

#SPJ2

Answer:

This is a test, please refer to the Academic Integrity and Honor Code

Answer:

21, 12

Step-by-step explanation:

can you give me brainliest pls im trying to level up lol

Answer:

2.44

Step-by-step explanation:

Have a good day :)

Answer:

its 6.

Step-by-step explanation:

i searched it, it means to multiply by descending positive integers. whatever that is

Sin E= 0. 198.

E= 11.42°

Step-by-step explanation:

using Pythagoras theorem.

Hyp²= base² + height ².

101²= 99²+x²

x²= 101²-99²

x²=10201-9801.

x²=400

x=√400

x=20

sin E = opposite

________

adjacent.

sin E= 20

__

101.

sin E=0.198.

E= sin^-1(0.198)

E= 11.42°

Answer:

There is a 95% chance it would land on an even number but on the first try it's known to be odd

Step-by-step explanation:

Answer:

-(p+1) (p-5)/ P

Step-by-step explanation:

Answer:

We are 95% confident that the proportion of American voters who favor congressional term limits is 64 percent with a difference of 3% for small sample size.

Step-by-step explanation:

95 % confidence means that we are 95 % confident that the the proportion of American voters who favor congressional term limits is 64 percent.

95 % confidence  means that of all the sample about 95 %  values are within in the given range.

And only 5% sample are not included in the given parameter.

Margin of error is the amount of miscalculation or difference in change of circumstances from the obtained data.

3% margin of error usually occurs when the data size is small.

As the data size increases the margin of error decreases.

So this statement tells us that we are 95% confident that the proportion of American voters who favor congressional term limits is 64 percent with a difference of 3% for small sample size.

Margin of error= z *σ/√n→

This indicates that as the sample size decreases the margin of error increases and vice versa.

Answer:

A chemical reaction happens when substances break apart or combine to form one or more new substances.

Step-by-step explanation:

New substances form when bonds break and new bonds form. The chemical properties of the new substances are different from those of the original substances

Answer:

AD = 11 units

Step-by-step explanation:

d = √(-6+6)²+(5+6)²

d = √11²

d = 11

Answer:

Since (x−2) is a factor of the polynomial 3x  

3

−2x  

2

+kx−6=0, we have

p(2)=0

i.e. 3(2)  

3

−2(2)  

2

+k(2)−6=0$

i.e. 24−8+2k−6=0

i.e. 2k=−10

i.e. k=−5.

Step-by-step explanation:

Answer:

33

Step-by-step explanation:

Supplementary angles add up to 180 degrees. So, 4x + (x+15) = 180

5x+15=180

5x=165

x=33

Complete question :

What is the average amount of milk used for an order of pancakes? Enter your answer as a fraction or mixed number in simplest form.

1/2c, 1/4c, 1/2c, 3/4c, 1/2c, 3/4c, 1/2c, 1/4c, 1/2c, 1/2c

Answer:

1/2c

Step-by-step explanation:

Taking the sum :

1/2c + 1/4c + 1/2c + 3/4c + 1/2c + 3/4c + 1/2c + 1/4c + 1/2c + 1/2c = 6/2c + 2/4c + 6/4c

6/2c + 2/4c + 6/4c

3/1 + 1/2 + 3/2 = (6 + 1 + 3) / 2 = 10 /2

= 5

Total number of orders = 10

Average = 5 / 10 = 1 /2 c