Which expression is equivalent to 4.2a−2(0.4a−1.3)

answer choices
3.4a+2.6
3.4a−1.3
3.4a+1.3
3.4a−2.6

please give an explanation!

Answer:

Here you go :)

Step-by-step explanation:

This is on Desmos

Answer:

Step-by-step explanation:

ab − cd = 0

ab − cd+− ab= 0 +− ab

−cd=−ab

− cd/−d = − ab /−d

c = ab / d

The answers is: 33

33 is the integer that represents her location relative to the surface after 7 seconds.

And 33 feet far the diver have to go to return to the surface.

Step-by-step explanation:

Given:

A scuba diver is 15.5 feet below the surface of the water.

The diver continues to swim downward at a rate of 2.5 feet per second.

Now, to find the integer represents her location relative to the surface after 7 seconds.

And to find how far does the diver have to go to return to the surface.

So, to get the integer represents her location relative to the surface after 7 seconds.

Initial depth = 15.5 feet.

Distance traveled down = 7 × 2.5 = 17.5 feet.

Final depth of water surface = Initial depth + Distance traveled down.

Final depth of water surface = 15.5 feet + 17.5 feet.

Final depth of water surface = 33 feet.

Thus, 33 is the integer represents her location relative to the surface after 7 seconds.

Now, to get how far does the diver have to go to return to the surface:

As, the diver goes to 33 feet down to the surface.

Thus, the diver to return she have to go through the same distance.

So, to return to the surface she need to go to 33 feet far.

Therefore, 33 is the integer that represents her location relative to the surface after 7 seconds.

And 33 feet far the diver have to go to return to the surface.

Answer:

the answer to your expression is 128. Here is how you can simplify it step by step:

First, apply the exponent rules to the fractions inside the parentheses. You can raise the numerator and the denominator to the same power separately. For example, \left(\frac{1}{4}\right)^4 = \frac{14}{44} = \frac{1}{256}.

Next, simplify the fractions by dividing the numerator and the denominator by their greatest common factor. For example, \frac{36}{12} = \frac{36 \div 12}{12 \div 12} = \frac{3}{1} = 3.

Then, perform the arithmetic operations inside the parentheses according to the order of operations. You can use the acronym PEMDAS to remember the order: Parentheses, Exponents, Multiplication and Division, Addition and Subtraction. For example, \frac{1}{4} + 4 \times 3 = \frac{1}{4} + 12 = \frac{1 + 48}{4} = \frac{49}{4}.

After that, apply the exponent rules to the parentheses. You can multiply the exponents when raising a power to another power. For example, \left(\frac{49}{4}\right)^3 = \frac{493}{43} = \frac{117649}{64}.

Finally, multiply the fractions by multiplying the numerators and the denominators. You can also multiply the fractions by the whole numbers by treating them as fractions with denominator 1. For example, \frac{117649}{64} \times 2^2 = \frac{117649}{64} \times \frac{2^2}{1} = \frac{117649 \times 4}{64 \times 1} = \frac{470596}{64} = 128.

Step-by-step explanation:

Answer:

  $1200

Step-by-step explanation:

You want to know the amount borrowed at 7.2% if the simple interest for one year is $86.40.

The interest formula is ...

  I = Prt

where P is the amount borrowed, r is the interest rate, and t is the number of years.

Using the given values, we have ...

  86.40 = P·0.072·1

  P = 86.40/0.072 . . . . . . divide by the coefficient of P

  P = 1200

You have borrowed $1200.

Answer: 1200

Step-by-step explanation: Linear equation. 7.2x = 100(86.40). then divide by 7.2 on each side. x=1200

Answer:

12x12 12x6 H = 46cm

Step-by-step explanation:

took quiz

Answer:

46 cm

Step-by-step explanation:

I learned this formula in math last year

Answer:80.25

Step-by-step explanation:

Answer:  90° clockwise rotation

Step-by-step explanation:

The rules for rotation are below:

90° clockwise rotation = (x, y)→(y, -x)

270° clockwise rotation = (x, y)→(-y, x)

180° counterclockwise rotation = (x, y)→(-x, -y)

90° counterclockwise rotation = (x, y)→(-y, x)

Let's take point B. Point B's coordinates are (3, -2). Point B' is (-2,-3). -x would be -3, and y stays the same.

Therefore, the answer is 90° clockwise rotation.

For additional resources, check out "Rotation Rules 90, 180, 270 degrees" by Math in Minutes.

Good luck!

Answer:

  (a)  The slope is negative two thirds, and the y-intercept is 9. The candle starts at a height of 9 inches and decreases two thirds of an inch every hour.

Step-by-step explanation:

You want to find the y-intercept and slope from the given graph of candle height versus time.

The y-intercept is the point on the y-axis where the graph intercepts the y-axis. This graph has a y-intercept of 9 inches, the height of the candle when it starts burning.

The slope of the graph is the ratio of "rise" to "run". Here, we can see that over a period of 3 hours, the candle loses 2 inches in height. That means the slope is ...

   slope = rise/run = (-2 in)/(3 h) = -2/3 in/h

This slope means the candle height decreases 2/3 inch every hour.

__

Additional comment

Your problem statement identifies points on the graph as (0, 9) and (3, 7). These are actually the points where we drew the "rise" and "run" lines in the attachment. They are points where the line crosses grid intersections, which are the best choice for finding slope.

The slope can be found algebraically as ...

  m = (y2 -y1)/(x2 -x1) = (7 -9)/(3 -0) = -2/3

We find it is often easier to count grid squares.

I had a simalar question where it was the same this but with 8 as the intercept sooooo it's c if ur looking for the answer hope this helps "The slope is negative two thirds, and the y-intercept is 8. The candle starts at a height of 8 inches and decreases two thirds of an inch every hour."

A. Because changing the size of a polygon doesn't change its angles, it would stay at 82°.

B. The characteristics needed to prove they are similar are just their angles.

C. The scale factor is 3, so P'Q'=3PQ.

Answer:

409

Step-by-step explanation:

This is very easy. First of all you need to workout out 1/10 of the value of the 9 in 296. The value of the 9 in 296 is 90.

1/10 of 90 is 9 (since 1/10 x 90 = 90/10 = 9)

The only number which has 9 as its final digit is 409

Answer:

Top answer · 0 votes

Q = 1.6LH3/2 38.4 = 1.6(3)(H3/2) H3/2 = 38.4/4.8 H3/2 = 8 (H3/2)2/3 = 82/3 Note that 82/3 = (3√8)2 = 22 = 4 The height is 4 ft  

Step-by-step explanation:

Answer:

y = 11x

Step-by-step explanation:

I know there is a proportional relationship because the line is straight and passes the Origin (graph) or has the same unit rate (table).

Answer:

your answer is 29

Step-by-step explanation:

using BODMAS

2.1+3.9 is 6

multiply by 4 gives 24

subtract 7 will give 17

on to the next bracket

6.2-4.2 is 2

multiply by 6 gives 12

17 +12 gives 29

your answer is 29

Answer:

The answer should be 410. I had this question in a test and yea!

Good luck

Step-by-step explanation:

Answer:

410

Step-by-step explanation:

Answer:

A=10x^2+14x

Step-by-step explanation:

A=wL

w=2x

L=5x+7

A=2x(5x+7)

A=10x^2+14x

Answer:

The mode is equal to the minimum

Is the correct answer

Step-by-step explanation:

In this case,

Mean = (52+48+48+54+50)/5

Mean = 50.4

The Median = 50,(the middle value)

Mode = 48  (the value that appears most often)

Now, the minimum value(smallest value) of the data set is 48

so,

The mode is equal to the minimum

Answer: the mode is equal to the minimum

Step-by-step explanation:

Answer: Tiana can build 12 swings in 20 days

Step-by-step explanation:

We know the equation:

y=0.6x

We can replace the variables.

y=0.6 x 20     (here, im using the x as a multiplication sign)

Now we calculate...

y=12

Answer: Tiana can build 12 swings in 20 days

Answer:

To find the greatest number of stickers Cassie can place on a page that is 11 inches long and 8 inches wide without them overlapping, we need to use the same approach as before.

Firstly, we need to calculate the maximum number of stickers that can fit along the length of the page, which is now 11 inches. Since each sticker is 3 inches long, we can fit 3 stickers along the length (11 ÷ 3 = 3 with a remainder of 2).

Next, we can calculate the maximum number of stickers that can fit along the width of the page, which is still 8 inches. Since each sticker is 2 inches wide, we can fit 4 stickers along the width (8 ÷ 2 = 4).

To ensure that the stickers do not overlap, we can only use the full row of 3 stickers from the previous calculation. Therefore, we can place 3 stickers along the length and 4 stickers along the width, giving us a maximum of 12 stickers that Cassie can place on the page without them overlapping.

Step-by-step explanation:

Answer:

16

Step-by-step explanation:

First, find out how much stickers you can put on the long side:

12/3 = 4

Next, find out how much stickers you can put on the wide side:

8/2 = 4

Lastly, calculate them together:

4x4=16

So the answer is 16.

Answer:

C

Step-by-step explanation:

I think the safety on the car depends on the person inside it.

Answer:13.8

Step-by-step explanation: Divide 27.60 by 2

Answer:

do you need help?

Step-by-step explanation:

what is the question

Answer: to understand the relation between the basic math operators + , − , × , ÷ so that solving an equation becomes easier and time saving.

Step-by-step explanation: Inverse operations are used to reverse the effect of one operation on the other. The purpose of inverse operations is to understand the relation between the basic math operators + , − , × , ÷ so that solving an equation becomes easier and time saving.

Answer:

because you have to to the same thing to both sides

{11, 14, 22}

     Triangle Inequality Theorem states that two sides of a triangle must be greater than the third side.

     Using this method, the answer is {11, 14, 22} because 11+14>22, 11+22>14, and 14+22>11

x = 67°

Same-side interior angles are supplementary.

     x° + 113° = 180°

     x° = 180° - 113°

     x = 67°

r = 2°

     The little box represents 90 degrees, meaning that these angles are complementary.

     9r + 2° + 70° = 90°

     9r + 72° = 90°

     9r = 18°

     r = 2°

Answer:

c

Step-by-step explanation:

Answer:

114.24 m2

Step-by-step explanation:

1. 8x8 = 64

2. 4^2 = 8

3. 8 x 3.14 = 25.12

4. 25.12 x 2 = 50.24

5. 50.24 + 64 = 114.24 m2

CHECK MY WORK BECAUSE I AM SO CONFUSED.

Answer:

1.29x=20

Let x = # of songs purchased

Step-by-step explanation:

each sing cost $1.29 and you only have $20 .

Answer:

Mean = 16

Step-by-step explanation:

MEAN can be find bg the sum of all score divided by the amount of the score.

Mean = total amount / number of amount

Total amount = 2 + 3 + 5 + 9 + 17+ 22 + 31 + 39

= 128

number of amount = 2, 3, 5, 9, 17, 22, 31, 39

= 8

Then we can calculate mean as

Mean = 128/8

Mean = 16