help, please I don't know this one

Answer:

A and E, there is honestly no really steps to find this out, you just kind of think if it makes sense like you wont divide when you want to find out how many and how many is a key word to multiplication so look for multiplication like A and E.

Step-by-step explanation:

Answer:

Distance of Sun and Mercury = 58,000,000 km.

In Scientific notation, it would be: 5.8 × 10⁷ Km

Diameter of a human hair = 0.0025 cm

In scientific notation, it would be: 2.5 × 10⁻³ cm

Before Comparison, we need to bring  to  or vice-versa, so we can easily calculate then, here, we will go from cm to Km.

2.5 × 10⁻³ × 10⁻⁵ Km = 2.5 × 10⁻⁸

Now, we can compare the values,  

5.8 × 10⁷ Km > 2.5 × 10⁻⁸

[ reason. - power of smaller number is in negative, it means, it is denominator, which would be very small as compared to other ]

Answer:

58,000,000 km

Step-by-step explanation:

Answer:

The answer to the first question is "a"

And the answer to the second is I think "c"

Step-by-step explanation:

Answer:

when u rationalize numbers you make the number a fraction so if it was a decimal u can rationalize.

Step-by-step explanation:

Please be quiet now I answered ue question

Answer:

The answer is 14

Step-by-step explanation:

14

Answer:

Cy has 42 baseball cards and 70 football cards

he wants to group them into packages with each package having the same number of cards of both types

so we have to find the highest common factor for 42 and 70 so they can be divided into packages equally and each package having an equal number of cards

the factors for 42 and 70 are as follows

42 - 1,2,3,6,7,14,21,42

70 - 1,2,5,7,10,14,35,70

the highest factor common for both is 14

therefore Cy can make 14 packages

each package will have

42/14 = 3 baseball cards

70/14 = 5 football cards

so each package will have 3 baseball cards and 5 football cards

Cy can make 14 packages

Answer:

A. x+138

Step-by-step explanation:

Deposit into her bank account is adding money to her bank account. So that means she's adding $138 to her bank. Which gives us the expression of x+138.

Answer:

A.

Step-by-step explanation:

Step-by-step explanation:

subtract

Answer:

$9.71 or $203.96

Step-by-step explanation:

5% of $194.25 is $9.71

if you wanted the overall cost that would be $203.96.

Answer:

$11.00 in sales tax

Explaination:

To find the sales tax from total bill, you would divide the total amount by "1 + the sales tax rate" (i.e., If the sales tax is 5%, divide the total amount by 1.05."

Soooo....

194.25 / 1.05 = 183.25**

** Now take that total and subtract it from the full total amount of 194.25.

194.25 - 183.25 = $11.00**

** This total is the amount of sales tax charged.**

Answer:

1 quart blue + 1 1/2 quart red

Given:

Ratio of blue paint : red paint = 1/3 : 1/2

simplifying this ratio into whole numbers by multiplying both sides by 2 and 3, we get:

(1/3) x (3x2) : (1/2) x (3x2)

2 : 3

From this we can determine the fractions of red and blue paint used in any total purple mix

fraction of blue paint = 2/(2+3) = 2/5 of purple mix

fraction of red paint = 3/(2+3) = 3/5 of purple mix

we are given that we want to make 2 1/2  (= 5/2) quarts of purple paint

hence

amount of blue paint

= fraction of blue paint in purple mix x total amount of purple paint

= (2/5) x (5/2) = 1 quart

amount of red paint

= fraction of redpaint in purple mix x total amount of purple paint

= (3 /5) x (5/2) = 3/2 quart = 1 1/2 quart

Step-by-step explanation:

Answer:

5-15= -20    20+12 = 8 yards

Step-by-step explanation:

Expression: 5-15+12=8

Sum: 8 yards

Its 8 yards because they lose a total of 20 yards then gains 12 yards so you just have to subtract 20 and 8 = 12 yards

Answer:

∠A = 48

Step-by-step explanation:

∠A + ∠B = 90   ( Complementary angles)

2x + 30 + 6x - 12 = 90

Combine like terms

2x + 6x +30 - 12 = 90

              8x  + 18 = 90   {subtract 18 form both sides}

                       8x = 90 - 18

                      8x = 72  {Divide both sides by 8}

                  8x/8 = 72/8

x = 9

∠A = 2x + 30

     = 2*9 + 30

     = 18 + 30

∠A = 48

Answer:

x=12

Step-by-step explanation:

Answer: $6 per pair

Step-by-step explanation:

Answer:A

Step-by-step explanation:I just did this and got 100.

Answer:

x = 15

Step-by-step explanation:

Given

3(x - 8) + 4 - 2x = - 5 ← distribute and simplify left side

3x - 24 + 4 - 2x = - 5

x - 20 = - 5 ( add 20 to both sides )

x = 15

Answer:

x = 15

Explicación paso a paso:

Dado

3 (x - 8) + 4 - 2x = - 5 ← distribuir y simplificar el lado izquierdo

3x - 24 + 4 - 2x = - 5

x - 20 = - 5 (suma 20 a ambos lados)

x = 15

Answer:

Yes.

Step-by-step explanation:

Answer:

yes

Step-by-step explanation:

The required expression is 12.6 - (-8.7) can be used to find Rajeev’s new position.

Algebraic expressions are mathematical statements with a minimum of two terms containing variables or numbers.

To find Rajeev's new position, we need to add the depths of his two descents.

Since the first descent was to a depth of 12.6 feet below the surface of the water, and the second descent was to a depth of 8.7 feet below the surface of the water, Rajeev's new position is 12.6 + 8.7 = 21.3 feet below the surface of the water.

Therefore, the expression we are looking for is 12.6 + 8.7 = 21.3. This is the same as the fourth option: 12.6 - (-8.7) = 21.3.

Learn more about the algebraic expression here :

brainly.com/question/21751419

#SPJ2

Answer:

10+10=20.

Step-by-step explanation:

because it just is

Answer: 20

Step-by-step explanation: 1+1=2add the zero to the back

Answer: -28 squared is the answer

Answer:

i believe it is the first one

Step-by-step explanation:

Answer:

1.6 gallons (so if you can only buy by the gallon, 2 gallons)

Step-by-step explanation:

You divide the total area by how much a gallon covers to get the number of gallons needed.

40/25=1.6