Which expression is equivalent to (-4y-x)-(3y-9x)?

A) -7y-8x

B) -7y+8x

C) -y-10x

D) y+10x

Answer:

A) 53

B) 53%

C) 37%

D) 63%

E) Yes.

Step-by-step explanation:

A) 53 people did not get headaches at all.

B) To solve for the percentage of participants that reported they did not get a migraine headache, you will need to divide out of the TOTAL number of people:

53/100= .53 --> Convert to percentage--> .53×100 = 53%.

C) To find this value, you will need to divide out of the amount of people that took MEDICINE and got a headache:

22/60≈0.367--> Convert to percentage --> 0.367×100≈37%

D) This percentage will be found out of who did NOT take the medicine:

25/40= 0.625 --> Convert to percentage --> 0.625×100≈63%

E) The medicine did help prevent migraine headaches because the percentage that got migraines with the medicine is lower than the percentage that got migraines WITHOUT the medicine.

Answer:250 N

Step-by-step explanation:

Given

mass of skater on left side [tex]m_l=70\ kg[/tex]

mass of skater on right side [tex]m_r=90\ kg[/tex]

If the skater on the left experience a force of [tex]250\ N[/tex]

If they push against each other then they must experience  an equal force according to newtons third law

Thus [tex]F_l=F_r[/tex]

Thus skater on right experience [tex]250\ N[/tex] force

Using Newton's third law, if the first skater pushes off with a force of 250 N, the second skater will experience an equal but opposite force of 250 N. This occurs irrespective of the skaters' masses.

The subject of this question is physics, specifically Newton's third law of motion, which states that for every action, there is an equal and opposite reaction. In this case, the action is the first skater pushing off the second skater, and the reaction is the force experienced by the second skater.

The amount of force experienced by the first skater is 250 N. Because of Newton's third law, this means the second skater is also experiencing a force of 250 N. The direction of the force, however, is in the opposite direction to the force experienced by the first skater.

The force experienced by an object is independent of its mass. Therefore, despite the second skater having a mass of 90.0 kg versus the first skater's 70.0 kg, the force experienced remains the same.

In conclusion, the second skater experiences a force of 250 N.

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Answer:

square root of 25=5 and square root of (x+9)=(x+9) so the answer is.... x+9=+-5

Step-by-step explanation:

Answer:

(20) 15 and 90

(21) $10 for adults and $4.50 per child

(22) 10 quarters and 15 dimes

Step-by-step explanation:

lol too much to explain but im certain im correct abt them. Good luck

Answer:

y=4.347

Step-by-step explanation:

To solve for y in the equation:

[tex]\dfrac{y}{2.3}+5.69 =7.58[/tex]

First, subtract 5.69  from both sides

[tex]\dfrac{y}{2.3}+5.69-5.69 =7.58-5.69\\\dfrac{y}{2.3}=1.89\\$Cross Multiply\\y=1.89 X 2.3\\y=4.347[/tex]

Answer:

That is a rhombus.

Brainliest is greatly appreciated

Answered by: Skylar

5/20/2020

1:37 PM (Eastern Time)

Answer:

This is a rhombus because it has 4 verticles, 4 edges and 2 lines of symmetry.

I know I'm late but hope this helps!!

Answer:

AB = 8.856 cm
Rounded would get you 8.86 cm.
Hope this helps.

Step-by-step explanation:

I don't know how I got it but it's right.

Answer:

1440 minutes

Step-by-step explanation:

24 hours a day x 60 minutes an hour = 1440 minutes on a day

Answer:

approx 31.24 euro

Step-by-step explanation:

area of vickys wall =5.7 × 2.8=15.96

area covered by one wallpaper=0.53×12=6.36

no of wall paper required=area of wall/area of 1 wall paper

=15.96÷6.36=2.50943396226

cost of 1 wall paper=12.45

cost of 2.50943396226 wall paper=31.2424528302 euro

Answer:

4498.91

Step-by-step explanation:

Answer:

C

Step-by-step explanation:

8x^2 -  8x + 2

=2(4x^2 - 4x  + 1)

=2(2x - 1)^2

Answer:

a. 17

b. 7

c. 2

Step-by-step explanation:

a. (20)-3=17

b. (10)-3=7

c. (5)-3=2

Answer: Here is the answer

Step-by-step explanation:

The correct missing proof are Δ UXY ~ Δ UST and subtraction property of equality.

Two triangles are said to be similar if their corresponding sides are equal and if the ratio of the sides are in equal ratios.

The proof is as follows :-

The given steps are;

1. Δ STU with ST || XY,                                1. Given

2. ∠1 and ∠2 are corresponding angles,   2. Def of corresponding angles

3. ∠3 and ∠4 are corresponding angles,  3. Def of corresponding angles

4. ∠1 ≅ ∠2; ∠3 ≅ ∠4,                              4. Corresponding angles theorem

5. Δ UXY ~ Δ UST                                       5. AA similarity theorem

6. SU/XU = TU/YU                                      6. Def of similar triangles  

7. SU = SX + XU, TU = TY +  YU,           7. Segment addition postulate

8. (SX + XU)/(XU) = (TY + YU)/(YU)        8. Substitution property    

9. SX/XU + 1 = TY/YU+1                          9. simplification

10. SX/XU = TY/YU                                 10. subtraction property of equality.

Hence, the correct missing proof are Δ UXY ~ Δ UST and subtraction property of equality.

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Answer:[tex]330^{\circ}[/tex]

Step-by-step explanation:

Given

Circumference of circle [tex]C=12\ units[/tex]

Arc length [tex]l=11\ units[/tex]

we know arc length is given by

[tex]l=\frac{\theta }{360^{\circ}}\times 2\pi r[/tex]

substituting value we get

[tex]11=\frac{\theta }{360}\times 12[/tex]

[tex]\frac{11}{12}=\frac{\theta }{360}[/tex]

[tex]\therefore \ \theta =330^{\circ}[/tex]

The central angle of the arc is approximately 330 degrees.

The question involves finding the central angle of an arc in degrees when the circumference of the circle is 12 and the arc length is 11. To solve this, it's essential to understand the relationship between the arc length, the central angle, and the circumference of the circle.

The formula we use is (Central Angle in degrees) / 360 = Arc Length / Circumference. Given that the circumference is 12 and the arc length is 11, we can substitute these values into the formula to find the central angle.

Thus, the calculation is as follows: (Central Angle in degrees) / 360 = 11 / 12.

By cross-multiplication, we find that the

Central Angle in degrees = (11 / 12) × 360.

This gives us a central angle of approximately 330 degrees.

Answer:

D) 114

Step-by-step explanation:

got it right on edge

Out of all 252 twelfth graders, the number of students that rode in a car to school is 114.

The first step is to determine the total number of students that rode a bicycle to school

Students that rode a bicycle to school = 815 - (276 + 196 + 314) = 29

The second step is to determine how many twelfth graders rode a bicycle to school: 29 - (8 + 10) = 11

Number of twelfth graders that rode a car to school = 252 - (99 + 11 + 28) = 114

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Answer:

Step-by-step explanation:

x² - 17x + 72 = 0

Sum = -17

Product  = 72

Factor = 8 , 9

x² - 17x + 72 = 0

x² - 8x -9x + (-8)*(-9) = 0

x(x - 8) -9(x -8) = 0

(x - 8 ) (x - 9) = 0

Length = (x - 8) units

Width = (x - 9) units

Answer:

.000025

Step-by-step explanation:

25*10^-6

The negative means we move the decimal point to the left

The 6 means move it 6 places

25.

6 places to the left

Add the number of zeros as required

000025

.000025

Answer:

0.000025

Step-by-step explanation:

25 × 10^-6

25/10⁶

25/1000000

0.000025

Answer: $324

Explanation: I changed the 8% to 0.08 and multiplied that by 300 and got 24. Then I added 300+ 24 to get $324.

Answer:

324

Step-by-step explanation:

final cost = (100+8)% of 300 = 324

Answer:

Expression A and C are correct because 9x - 3x = 6x and 5x + x = 6x, then -4

After simplification, Expression A (6x - 4) and Expression C (6x - 4) are equivalent to each other, but Expression B (12x - 4) is not equivalent to the other two.

The student's teacher presented a problem to determine the equivalence of three algebraic expressions: Expression A (9x - 3x - 4), Expression B (12x - 4), and Expression C (5x + x - 4).

Brianna incorrectly states that all three expressions are equivalent simply because they all evaluate to -4 when x = 0. However, this is a misinterpretation, as equivalence between algebraic expressions means that they yield the same result for all values of x, not just a single value.

To correct this, we simplify each expression:

Expression A: 9x - 3x - 4 simplifies to 6x - 4.

Expression B: 12x - 4 remains the same.

Expression C: 5x + x - 4 simplifies to 6x - 4.

After simplification, we see that Expression A is equivalent to Expression C, both simplifying to 6x - 4. However, Expression B remains different, with the term 12x - 4.a

The dimensions of the rectangle are 9 inches (width) and 16 inches (length) as obtained from solving the quadratic equation derived from the facts provided.

To solve this problem, let's denote the width of the rectangle as x in inches. Since we know that the length of the rectangle is 7 inches longer than its width, we can write it as x + 7 inches. The area of a rectangle is calculated by multiplying its length by its width. Here, it's given as 144 square inches.

Setting up the equation for the area, we get x(x + 7) = 144.

Solving this quadratic equation, we find that x = 9. As a result, the width is 9 inches and the length, being 7 inches longer, is 16 inches. Therefore, the dimensions of the rectangle are 9 inches by 16 inches.

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To solve the inequality -3(-3x - 4) < 66, first distribute the -3, then isolate the variable term resulting in 9x < 54 and divide by 9 to find x < 6 as the solution set.

Solving the Inequality

To solve the inequality -3(-3x - 4) < 66, we first distribute the -3 across the terms within the parentheses, which gives us 9x + 12 < 66.

Next, we subtract 12 from both sides to isolate the term with the variable, resulting in 9x < 54. Finally, we divide both sides by 9 to solve for x, which yields x < 6.

Thus, the solution set to the inequality is all real numbers less than 6.

Answer:

A

Step-by-step explanation:

This can be easily seen. 7/14 simplified is 1/2. When 20/40 is simplified, it's also 1/2

Answer:

Multiply the numerators and the denominators.

Step-by-step explanation:

Problem: [tex]\dfrac{1}{x^2}- \dfrac{2}{y}\div y-2x^2[/tex]

Step 1: [tex]\dfrac{y}{x^2y}- \dfrac{2x^2}{x^2y}\div y-2x^2[/tex]

Step 2: [tex]\dfrac{y-2x^2}{x^2y} \div \dfrac{y-2x^2}{1}[/tex]

Step 3: [tex]\dfrac{y-2x^2}{x^2y} X \dfrac{1}{y-2x^2}[/tex]

The next step would be to multiply the numerators and the denominators.

Step 4: [tex]\dfrac{y-2x^2}{(x^2y)(y-2x^2)}[/tex]

Since [tex]y-2x^2[/tex] is common in the numerator and denominator, it divides itself, thus our result is:

[tex]\dfrac{1}{x^2y}[/tex]

Answer:

$9.3 dollars.

Step-by-step explanation:

To solve this question, you will need to begin by finding the percentage left of the original value:

100%-70%= 30% left.

Now, to find the exact value of the discounted item, you will solve for 30% (0.3) of $31:

0.3×31= $9.3 dollars.

Answer:

{-12, 9, 24}

Step-by-step explanation:

Set the given f(x) = (x - 9)(x + 12)(x - 24) = to 0.  Then, one by one, set each factor = to 0 and solve for x:  We get the zeros {-12, 9, 24}

Answer: x = 9, x = −12, x = 24

Answer:

  6 bags

Step-by-step explanation:

1 yard is 3 feet, so the area of the cage is ...

  A = LW

  A = (9 ft)(3 ft) = 27 ft^2

At 5 square feet per bag, the number needed is ...

  (27 ft^2)/(5 ft^2/bag) = 5.4 bags

We assume that Amelia can only buy whole bags, so ...

Amelia will have to buy 6 bags to cover the floor of the cage.

Answer:

An arc is a segment of a circle. An arc measure is the measure of an angle that the arc creates in the center of a circle, while an arc length is the span of the arc. This measure can be given in degrees or radians. We can easily convert between the two using the fact that pi radians = 180 degrees.

Step-by-step explanation:

Answer:

6 outcomes

Step-by-step explanation:

3 (main courses) x 2 (drinks) = 6 outcomes

eggs - orange juice

granola - orange juice

oatmeal - orange juice

eggs - milk

granola - milk

oatmeal - milk

Answer: the answer is -1, -2

Step-by-step explanation:

Step-by-step explanation:

The answer is 342

Because when we divide 19 by 13 = 1.46

Then when we divide 500 by 1.46 = 342

Answer:

1x1x1x1x1

Step-by-step explanation:

1^5 is the same as 1x1x1x1x1 because a power multiplies a number by itself

Answer:

1x1x1x1x1

Step-by-step explanation:

1^5 = 1x1x1x1x1 = 1

(happy to help!!!)