Which of the following will result in a rational number? Select all that apply.
A. 645+9√4

B. 645−5√7

C. 645×9√4

D. 645÷5√7


help me please

Answer: x=40

Step-by-step explanation:Let's solve your equation step-by-step.

6+0.5x=26

Step 1: Simplify both sides of the equation.

0.5x+6=26

Step 2: Subtract 6 from both sides.

0.5x+6−6=26−6

0.5x=20

Step 3: Divide both sides by 0.5.

0.5x

0.5

=

20

0.5

x=40

Answer:

x=40

Answer:

1

Step-by-step explanation:

that is a cute thing to be said that you know is the only way you could

∠1 is congruent to ∠3 because they alternate angles.

The angles that are in the same position on two parallel lines intersected by a transversal line on the parallel lines.

Corresponding angles are equal.

We have,

From the figure,

∠1 and ∠3 are alternate angles.

∠2 and ∠4 are alternate angles.

∠1 and ∠2 are linear pairs.

∠4 and ∠3 are linear pairs.

Now,

∠1 and ∠3 are alternate angles.

Alternate angles are equal.

Thus,

∠1 and ∠3 are congruent angles.

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Answer:

35%

Step-by-step explanation:

.0035*150= .525

.0015*150=.225

.286*150=42.9

.35*150=52.5

The requried percentage of 52.5 in 150 is given as 35%.

The percentage is the ratio of the composition of value to the overall composition of value multiplied by 100.

here,
According to the question,
requried percent of 52.5 in 150,
= value/ whole value × 100%
= 52.5/150 × 100%
= 35%

Thus, the requried percentage of 52.5 in 150 is given as 35%.

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Answer:

ask a tutor , they are available

Answer:

LCM is 30.

Step-by-step explanation:

She forgot that they both can multiply into 30. She listed all their multiples and their LCM is 30. Not 60. That's her error.

Hope this helps and have a nice day!

Answer:

14 + 22 = 36

Step-by-step explanation:

well last time i checked the answer is pretty clear

Step-by-step explanation:

-10x - y = 27 ...1

-4x - y = 9 ...2

...1 - ...2

-10x -y - (-4x - y) = 27 - 9

-10x -y +4x + y = 18

-10x + 4x = 18

-6x = 18

x = 18/(-6)

= -3

Answer:

x = - 3, y = 3

Step-by-step explanation:

Given the 2 equations

- 10x - y = 27 → (1)

- 4x - y = 9 → (2)

Multiplying (1) by - 1 and adding to (2) eliminates the term in y

10x + y = - 27 → (3)

Add (2) and (3) term by term to eliminate y

6x = - 18 ( divide both sides by 6 )

x = - 3

Substitute x = - 3 into either of the 2 equations and solve for y

Substituting into (2)

- 4(- 3) - y = 9

12 - y = 9 ( subtract 12 from both sides )

- y = - 3 ( multiply both sides by - 1 )

y = 3

Solution is x = - 3, y = 3

Given:

The expression is [tex]\dfrac{7}{\frac{5}{8}}[/tex].

To find:

The shows the correct way to use the rule ""multiply by the reciprocal"" for the given expression.

Solution:

According to the rule "multiply by the reciprocal", if a,b,c,d are four number, then

[tex]\dfrac{\dfrac{a}{b}}{\dfrac{c}{d}}=\dfrac{a}{b}\times \dfrac{d}{c}[/tex]

We have,

[tex]\dfrac{7}{\frac{5}{8}}[/tex]

It can be written as

[tex]\dfrac{7}{\frac{5}{8}}=\dfrac{\dfrac{7}{1}}{\dfrac{5}{8}}[/tex]

Using the rule "multiply by the reciprocal", we get

[tex]\dfrac{\dfrac{7}{1}}{\dfrac{5}{8}}=\dfrac{7}{1}\times \dfrac{8}{5}[/tex]

[tex]\dfrac{\dfrac{7}{1}}{\dfrac{5}{8}}=\dfrac{7\times 8}{1\times 5}[/tex]

[tex]\dfrac{\dfrac{7}{1}}{\dfrac{5}{8}}=\dfrac{56}{5}[/tex]

Therefore, the correct option is D.

150 ÷ 20 = 7.5 minutes per 1 mile

7.5 x 6 = 45 minutes

7.5 + 7.5 = 15 minutes or 2 miles in 15

60 ÷ 7.5 = 8 mph

mpm = 7.5

90 ÷ 5 = $18 per hour

18 x 8 = $144

18 x 3 = 54 (close to $60)

Step-by-step explanation:

hope this helps

Answer: (a) Sarah     (b) 45 minutes     (c) 2 miles     (d) 8 miles per hour  

              (e) 7.5 minutes per mile          (f)  $144         (g) 3 1/3 hours

Step-by-step explanation:

[tex]\text{Joey:}\quad \dfrac{\$11}{3\ hours}\\\\\\\text{Sarah:}\quad \dfrac{\$2}{\frac{1}{2}\ hour}\times \dfrac{6}{6}=\dfrac{\$12}{3\ hours}[/tex]

When comparing the same number of hours, Sarah earns $12, Joey earns $11.

***************************************************************************************************

                            [tex]\dfrac{20\ miles}{150\ minutes}=\dfrac{6\ miles}{x}[/tex]

Cross Multiply:     20(x) = 150(6)

Divide by 20:             x = 900/20

Simplify:                     x = 45 minutes

***************************************************************************************************

                             [tex]\dfrac{20\ miles}{150\ minutes}=\dfrac{x}{15\ minutes}[/tex]

Cross Multiply:      20(15) = 150(x)

Divide by 150:       300/150 = x

Simplify:                 2 miles = x

***************************************************************************************************

Use conversion: 60 minutes = 1 hour

[tex]\dfrac{20\ miles}{150\ minutes}\times \dfrac{60\ minutes}{1\ hour}=\quad \dfrac{1200\ miles}{150\ hour}\quad =\large\boxed{\dfrac{8\ miles}{1\ hour}}[/tex]

***************************************************************************************************

[tex]\dfrac{150\ minutes}{20\ miles}\div \dfrac{20}{20}=\quad \large\boxed{\dfrac{7.5\ minutes}{1\ mile}}[/tex]

***************************************************************************************************

                           [tex]\dfrac{\$90}{5\ hours}=\dfrac{x}{8\ hours}[/tex]

Cross Multiply:     5(x) = 90(8)

Divide by 5:             x = 720/5

Simplify:                   x = $144

***************************************************************************************************

                            [tex]\dfrac{\$90}{5\ hours}=\dfrac{\$60}{x}[/tex]

Cross Multiply:     5(60) = 90(x)

Divide by 90:        300/90 = x

Simplify:               3 1/3 hours = x

Answer: 31 push-ups per day

Step-by-step explanation: 93/3 = 31 because 90/3=30 and 3/3 = 1 so 30 + 1 = 31.

Hope this helps!

Answer:

the thing i cant see it

Step-by-step explanation:

Answer:

Julie will reach her goal first. i dont know how to explain it but you could probably figure that out

Answer:

-1 + 2 = 1

1 + (-2) = -1

-1 - 2 = -3

1 - (-2) = 3

Step-by-step explanation

When you subtract use keep change change

Rule 1 when you add : If the signs are the same add the numbers and take the sign of the bigger number.

Rule 2 when you add : If the signs are different subtract the numbers and take the sign of the bigger number.

I wanted to help you understand and i hope i did that!

Option D is the correct answer

Answer:

It is option D. -6x + 2y = 12

Answer:

66.67%

Step-by-step explanation:

Percent Error Formula =

| Approximate value - Exact value|/Exact value × 100%

| 2 - 3|/3 × 100%

1/3 × 100%

= 66.67%

The percent Error is 66.67 %

Answer:

Step-by-step explanation:

Simplify:

Answer:

X = 3

Step-by-step explanation:

3x = -3x + 15

3x +2x = 15

5x = 15

x = 3

Answer:

The answer is 3 :)

Step-by-step explanation:

Answer:

1. Her time in minutes is 720/s minutes

2. Given her time to be 20 minutes, her speed is 36 mph

Step-by-step explanation:

Mathematically,

Distance = speed * time

In this question, we want to calculate time;

So time = distance/speed

times = 12 miles/s mph = 12/s hours

Now we want our answer in minutes

Kindly recall that 60 minutes = 1 hour

So 12/s hours will be 12/s * 60 = 720/s minutes

2. Since she drives from home to the office in in 20 minutes, we want to calculate her speed in mph

From the time calculated above i.e 720/s

We can equate 20 = 720/s

20s = 720

s = 720/20

s = 36 mph

Answer: c

Step-by-step explanation:

Answer:

y = 1/7x + 25/7

Step-by-step explanation:

Find the slope using the formula [ y2-y1/x2-x1 ]

5-3/10-(-4)

2/14

1/7

Find the y-intercept using slope-intercept form [ y = mx + b ], the slope, and one of the points given.

y = 1/7x + b

3 = 1/7(-4) + b

3 = -4/7 + b

3 4/7 = b

Put everything we solved for back into the formula.

y = 1/7x + 25/7

Best of Luck!

Step-by-step explanation:

AFE-BFD<---------------

Hello.

Vertical angles are two sets of angles congruent to each other, both on opposite sides, but measure the same.

In the diagram shown, both angles ∠BFC and ∠EFA are identical, it seems mirrored, thus they are vertical angles.

The correct answer is B.

Answer:

0.25m³

Step-by-step explanation:

If Riya is applying mulch to her garden. She applies it at a rate of 250,000 cm³ for every m², to know how much she is applying in m³ for every m², we will make use of the conversion formula:

100cm = 1m

1cm = 1/100m

1cm = 0.01m

250,000cm³ = 250,000 × 1cm×1cm×1cm

250,000cm³ = 250,000×0.01×0.01×0.01

= 250,000×0.000001

= 0.25m³

Hence Riya is applying at 0.25m³ per m²

Answer:

0.25m³ / m²

Step-by-step explanation:

Given that:

Rate of application = 250,000 cm³ of mulch per m²

The rate of application in m³ per m² can be calculated thus :

Converting 250,000 cm³ to m³

1cm = 1/100 = 0.01m = 1 * 10^-2 m

Hence

1cm³ = (1 * 10^-2 m)³ = 1 × 10^-6 m³

Hence,

250,000cm³ = (250,000 * 10^-6)m³ = 0.25m³

Hence, rate of application in m³ / m² equals

0.25m³ / m²

Answer:

It is 47

Step-by-step explanation:

7+5 is 12, 12 plus 35 equaks 47

(x,y) → (-x,y - 9) is the correct transformation for the given graph so option (A) will be correct.

Transformation is rearranging a graph by a given rule it could be either increment of coordinate or decrement or reflection.

Reflection is a mirror image of a graph about any axis.

If we reflect any graph about y = x then the coordinate will interchange it that (x,y) → (y,x).

Given the quadrilateral QRST not if we look at Q'R'S'T' it is 9 units downward so it means there will be 9 units decrement in y units.

So y → y - 9

Now,

Q'R'S'T' is as far from the x-axis as QRST but on the negative x-axis.

So,

x → -x

Hence "(x,y) → (-x,y - 9) is the correct transformation for the given graph".

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Answer:

Eric earnings equals $7

Step-by-step explanation:

Let amount earned by Robert = $10

Amount earned by Eric = $x

Robert earnings = 2x - 4

2x - 4 = 10

2x = 10 + 4

2x = 14

Divide both sides by 2

x = 14 / 2

= 7

x = 7

Eric earns $x which is equal to $7

Eric earnings equals $7

Answer:

  $512

Step-by-step explanation:

Charges at the first hotel are ...

  4(168 -40) = 4(128) = 512

Charges at the second hotel are ...

  (4-1)(185) = 3(185) = 555

The first hotel offers the better rate: $512 for four nights.

Answer:

A

Step-by-step explanation:

We can substract the wavength of the violet light to the wavelength of the red light:

(6.5 x 10^-7 m) - (4.0 x 10^-7 m) = 2.5 x 10^-7 m

Answer:

A) 2.5× 10–7 m

explanation:

I took the test