If x=−5 and y=4, evaluate the following expression:2(y−3xy)

Answer

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Answer:

C

Step-by-step explanation:

divide budget by the cost of one computer

Answer:

It would be B. because if you subtract them you would have 15/21. divide both by three and you get 5/7. Hope this helps

Step-by-step explanation:

Answer:

perpendicular

Answer:

$529.20

Step-by-step explanation:

If there are 30 days in a month and there are 12 months in a year,

30*12 = 360  

then there are 360 days in a year

Assuming we run at 7 hours per day

 7 hrs/ day * 360 days = 2520 hours

We will run 2520 hours in a year

At $.21 per hour,

.21* 2520 = 529.20

It will cost $529.20  to run the air conditioner for the year

None of the choices

Answer:

2

Step-by-step explanation:

Answer:

2. Hope this helps.

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Answer:

-4x = x² - 12

x² + 4x - 12 = 0

(x - 2)(x + 6)

x = -6, 2

{(-6, 24), (2, -8)}

Answer: 2x + 4 ≥ 7

Step-by-step explanation: If Brian = x then Joel = x + 4. Sum up the expressions that represent the amount of pets they have and it has to be greater than or equal to 7 since that is the smallest amount of total pets the two families have. Therefore, the correct answer is 2x + 4 ≥ 7

Answer:

t(1) = -3.5, Recursive equation is t(n) = t(n-1) + 4.5

Step-by-step explanation:

t(n)=4.5n-8

Let find the sequence

Plug in n=1,2,3,4.....

n=1      t(1)=4.5(1) -8= -3.5

n=2      t(2)=4.5(2) -8= 1

n=3      t(3)=4.5(3) -8= 5.5

n=4      t(4)=4.5(4) -8= 10

so sequence is -3.5, 1, 5.5, 10................

Now we find the common difference

1 - (-3.5) = 4.5

5.5-1 = 4.5

10 - 5.5 = 4.5

common difference d = 4.5

Formula for recursive function is

t(n) = t(n-1) + d

We got d= 4.5

t(n) = t(n-1) + 4.5 , also t(1) = -3.5

Final answer:

The student seems confused between a linear and a quadratic equation. The provided equation is linear (t(n) = 4.5n - 8), while the supporting information describes how to solve a quadratic equation using the quadratic formula with specified coefficients.

Explanation:

The question posed by the student pertains to a recursive equation, which is a formula that defines each term of a sequence using preceding terms. However, the recursive equation mentioned (t(n) = 4.5n - 8) seems to be a simple linear equation rather than a recursive one. The student may be asking for a recursive form, but has provided a linear formula instead.

The additional information provided references a quadratic equation where the coefficients a, b, and c are given as 4.90, ±14.3, and ±20.0, respectively. The general form of a quadratic equation is at² + bt + c = 0. The solutions to this quadratic equation can be found using the quadratic formula, which is x = (-b ± √(b² - 4ac)) / (2a). To find the solutions to the given quadratic equation, the values of a, b, and c would be substituted into the quadratic formula and the resulting expression solved.

For clarity, it seems there might be some confusion in the question as it mixes linear and quadratic equations. It is important to correctly identify the type of equation and its coefficients to proceed with finding a solution.

Answer:

Im pretty sure its a. C and G

Step-by-step explanation:

Answer: The answer is (C) C and E.

Step-by-step explanation:  We are given a figure including a plane 'w' and a number of points A, B, C, D, E and F around the plane. We are to select the pair of points from the given options that  lie within the plane 'w'.

We can see in the figure that the points A and F lie above the plane 'w'; the points  B and D lie below the plane 'w'; the points C and E lie on or within the plane 'w'.  

Since we are to find the set of points lying within the plane 'w', so option (C) is the correct option.

Answer:

B

Step-by-step explanation:

Answer:

Jade has 1,124.41 Yen. Julio has 11,244.15 Yen. Anna has 112,445.39 Yen.

Step-by-step explanation:

I know this because I went to an exchange website.

The question was about converting US dollars to Japanese yen. The conversion is based on the exchange rate, last known to be 103 yen per US dollar. Jade with $10 would have 1,030 yen, Julio with $100 would have 10,300 yen and Anna with $1,000 would have 103,000 yen.

The value of each individual's dollars in Japanese yen would be determined by the current exchange rate. As of the last known rate, it was approximately 103 yen per US dollar. Therefore:

These calculations can change depending on the fluctuations in the exchange rate.

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Final answer:

The commercial's claim that '80% of dentists recommend this toothpaste' might be misleading because it lacks context and does not specify the criteria or sample size used in the recommendation survey.

Explanation:

The commercial that says "80% of dentists recommend this toothpaste" might be misleading because the 80% figure does not provide the full context of the recommendation. It does not specify whether the recommendation is based on a survey of all dentists or a specific group of dentists. For example, if the survey only included a small sample of dentists who were given incentives to recommend the toothpaste, the result may not accurately represent the entire dentist population. Additionally, the commercial does not provide information about the criteria used for the recommendation. It is possible that the toothpaste is recommended for a specific condition or age group, but not necessarily for everyone. Therefore, it is important to critically evaluate such claims and look for more detailed information before making a decision based solely on the statistic provided in the commercial.

Answer:

$15 each

Step-by-step explanation:

$45/3 children= $15 each

Answer:

Step-by-step explanation: I would say y=x+2 or 2 because every number that you add 2 to, it gives you the solution which is the second number

Hope this helps!!!!

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Answer:

Adele's current age is 12

Step-by-step explanation:

Let a = Adele's current age

Let t = Timothy's current age

Adele is 5 years older than Timothy:

a = t + 5       {equation 1}

In 3 years Timothy will be 2/3 of Adele's age:

(2/3)(a + 3) = t + 3     {equation 2}

Since we are looking for Adele's age, let's rearrange equation 1 to:

t = a - 5

Substitute that into equation 2 and solve for a.

(2/3)(a+3) = a - 5 + 3

(2/3)(a + 3) = a - 2

Multiply through by 3 to clear the fraction

2(a+3) = 3a - 6

2a + 6 = 3a - 6

Add 6 to both sides, subtract 2a from both sides

12 = a

Adele is 12 years old

This means Timothy is 7 years old.

Check equation 2 to verify:

(2/3)(a + 3) = t + 3

(2/3)(12+3) = 7 + 3

(2/3)(15) = 10

10 = 10

Answer:

Adele is 12 years old

Step-by-step explanation:

Answer:

see explanation

Step-by-step explanation:

the equation of a circle in standard form is

(x - h)² + (y - k)² = r²

where (h, k) are the coordinates of the centre and r is the radius

To obtain this form use the method of completing the square on both the x and y terms

rearranging

x² + 6x + y² - 4y = 12

x² + 2(3)x + 9 + y² + 2(- 2)y + 4 = 12 + 9 + 4

(x + 3)² + (y - 2)² = 25 ← in standard form

with centre = (- 3, 2) and r = [tex]\sqrt{25}[/tex] = 5

Answer:

Yes. There is a constant rate of increase of $2.50 for each ride.

Step-by-step explanation:

Lets write each persons cost and rides in the form y =mx+b

y being the total cost and x is the number of rides

Holly

(1 , 12.50)

Maria

(2,15)

Johnny

(4,20)

Lets calculate the slope

m = (y2-y1)/(x2-x1)

   = (20-15)/ (4-2)

  = 5/2

We can use the point slope form to determine b

y-y1 = m(x-x1)

y-20 = 5/2 (x-4)

Distribute

y-20 = 5/2x -20/2

Add 20 to each side

y-20+20 = 5/2x -10 +20

y = 5/2x +10

The slope or cost per ride is 2.50 and the y intercept is 10

Answer:

B) 4[3(5+2)] not equal 95-4×3

Step-by-step explanation:

4[3(5+2)]=95-4×3

84=95-4x3

84=83

So since they are not equal B. is the correct answer!

Answer:

Option B.

Step-by-step explanation:

The given expression is

4[3(5 + 2)] = 95 - 4×3

We will solve the left side of the expression first

4[ 3(5 + 2)] = 4[ 3(7) ]

= 4 × 21

= 84

Now we take the right side of the expression

95 - 4×3

= 95 - 12

= 83

Now it's clear that right side of the expression is not equal to the left side of the expression.

Therefore, Option B is the correct option.

Answer:

I think it's maybe 5

Step-by-step explanation:

First, you would do 16+9, which is 25

Second, you would figure out the square root of 25, which would be 5

So, 5 would be your answer I guess

Hope this helps :)

Answer:

Step-by-step explanation:

Given:

240 red and blue cars

3:5 ratio of red cars to blue cars

3 + 5 = 8

red cars: 3/8 * 240 = 90

blue cars: 5/8 * 240 = 150

ratio of red cars to blue cars: 90:150

simplify:

 90 ÷ 30 = 3

150 ÷ 30 = 5 

Thus: 90:150 = 3:5

Answer:

Imagine math : 90, because 38 of the cars are red

Step-by-step explanation:

Answer: 49

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Explanation:

HI is parallel to KL, so this means that the two triangles can be proven similar through the AA (angle angle) similarity theorem.

Consequently, that means we can set up the proportion below

JH/JK = HI/KL

noticed how the left slant sides JH and JK pair up together on one side; the horizontal sides HI and KL pair up on the other side. I have the larger triangle's side lengths as the numerator for each side

Plug in the given values. Solve for HI

JH/JK = HI/KL

35/15 = HI/21

7/3 = HI/21

21*7 = 3*HI

3*HI = 147

HI = 147/3

HI = 49

This means that 35/15 = HI/21 turns into 35/15 = 49/21

Note: to check the answer that the last equation mentioned is true, we can subtract the fraction 49/21 from both sides to end up with 35/15 - 49/21 = 0. If you type "35/15 - 49/21" into your calculator, you should get 0, which will help confirm we have the right answer.

Answer:

(420/2)-10=r

r=200

Step-by-step explanation:

Answer:

r = 200

Step-by-step explanation:

divide both sides by 2

210 = r + 10 ( subtract 10 from both sides )

200 = r ⇒ r = 200

Following PEDMAS ( order of operations, multiplication comes before addition:

6+6-1+45*7=

6 +6 -1 + 315 =

Now do the addition and subtraction from left to right:

6+6 = 12 - 1 = 11 + 315 = 326

The answer is 326.

Answer:

The distance between both positions are 4.5

Step-by-step explanation:

we are given

Two similar artifacts are found—one at position (1,4) and the other at (5,2)

First point is (1,4)

x1=1

y1=4

Second point is (5,2)

x2=5

y2=2

now, we can use distance formula

[tex]D=\sqrt{(x_2-x_1)^2+(y_2-y_1)^2}[/tex]

now, we can plug values

[tex]D=\sqrt{(5-1)^2+(4-2)^2}[/tex]

[tex]D=\sqrt{20}[/tex]

[tex]D=4.5[/tex]

Answer:

Step-by-step explanation:

Answer:

The distance between both positions are 4.5

Step-by-step explanation:

we are given

Two similar artifacts are found—one at position (1,4) and the other at (5,2)

First point is (1,4)

x1=1

y1=4

Second point is (5,2)

x2=5

y2=2

now, we can use distance formula

now, we can plug values

Answer:

$43.13

Step-by-step explanation:

The original price plus the markup = selling  price

The markup = original price * percent markup

So

selling price = original price + original price* percent markup

Factoring out the original price

selling price = original price (1+ percent markup)

Substituting what we know)

69 = original price (1+.60)

69 = original price(1.6)

Divide both sides by 1.6

69/1.6 = original price

43.125 = original price

We round money to the nearest cent

$43.13

To find the cost of the sweater to Sears, divide the selling price by 1.6.

To calculate the cost of the sweater to Sears, we need to first find the selling price. A 60% markup on the selling price means that the selling price is 160% of the cost price. Let's say the cost price of the sweater to Sears is C.

So, the selling price of the sweater is 160% of C. In equation form, this can be expressed as: 1.6C = $69.

To find the cost price, we can divide both sides of the equation by 1.6: C = $69/1.6 = $43.125.

The cost of the sweater to Sears is $43.125.

Answer: The measure of JK is 60 and the correct option is d.

Explanation:

It is given that the points F, G, and H are the midpoints of the sides of triangle JKL , FG = 37, KL = 48, and GH = 30.

The point F is midpoint of JK, point G is midpoint of KL and the point H is midpoint of LJ as shown in figure .

According to the midpoint theorem, the line connecting the midpoints of two sides is parallel to the third and its length is half of the third side.

By midpoint theorem,

Therefore the measure of JK is 60 and the correct option is d

The measure of FH = 24 units, measure of JL = 74, measure of KJ = 60

and, measure of FJ = 30.

What is coordinate geometry?

A coordinate plane is a 2D plane that is formed by the intersection of two perpendicular lines known as the x-axis and y-axis. A coordinate system in geometry is a method for determining the positions of the points by using one or more numbers or coordinates.

As given in the question,

F, G, and H are the midpoints of the sides of ΔJKL.

F is the midpoint of KJ, G is the midpoint KL, H is the midpoint of JL

Measure of the required sides are as follow:

FH = (KL / 2)                         (by midpoint theorem)

    = (48/2)

    = 24

JL = 2 x FG             (by midpoint theorem)

  = 2 x 37

  = 74  

KJ = 2 x GH             (by midpoint theorem)

   = 2 x 30

   = 60

FJ = GH = 30            (by midpoint theorem)

Therefore, measure of FH = 24, measure of JL = 74, measure of KJ = 60 and measure of FJ = 30.

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Answer:

10.09

Step-by-step explanation:

52.95-2.50=50.45

divided by 5 = 10.09