Please help last question and I don’t understand

They spent $111 on shopping

Step-by-step explanation:

Let the amount they spent be 'a'

Leilas amount = $134

Diannes amount = $180

After they spent same amount on shopping dianne had 3 times as much money as Leila

180 - a = 3(134 - a)

180 - a = 402 - 3a

3a - a = 402 - 180

2a = 222

a = $111

They spent $111 on shopping

Answer:

B. a decrease in their water bill of $3.16.

Step-by-step explanation:

Monthly service charge =$10.10

Volume charge = $1.58 for every 100 cubic feet of water.

Total monthly cost = 1.58x + 10.10

If the Johnson family used [tex]200ft^3[/tex] less water this month than last month, then they can expect a reduction in their bill by the Volume charge for  [tex]200ft^3[/tex].

Volume Charge per [tex]100ft^3[/tex] of water = $1.58

Therefore: Volume Charge for [tex]200ft^3[/tex] of water = 2 X $1.58=$3.16

Therefore, the Johnson family can expect a decrease in their water bill of $3.16.

The correct answer is B) a decrease in their water bill of $3.16.  

Given the equation: y = 1.58x + 10.10

Johnson family used 200 cubic feet less water.

200 cubic feet = 2 hundreds of cubic feet.

Change in water usage: [tex]\(\Delta x = -2\)[/tex]

Calculate the change in the water bill:

[tex]\(\Delta y = 1.58 \times \Delta x\)[/tex]

[tex]\(\Delta x = -2\): \(\Delta y = 1.58 \times (-2)\)[/tex]

[tex]\(\Delta y = -3.16\).[/tex]

The water bill will decrease by $3.16.

Correct answer: B. a decrease in their water bill of $3.16.

C is correct,

A is wrong as it halves both the angles and lengths by two which is the same as what she did in the first place so it cannot be correct.

B is also wrong for a similar reason, a triangle cannot have less than 180 degrees, which is impossible as the angles just change naturally which is why all triangles must have 180 degrees, which is the reason she is wrong in the first place.

And D is just incorrect, if she wanted to have shorter sides she should have only decreased all the lengths as it the the ratio of angles that determine the shape of a triangle while the sum of all angles is 180 degrees.

Answer: C

Step-by-step explanation:

The unit of measure used to express the volume of a prism is  cubic units correct option is c.

Volume refers to the amount of space occupied by a three-dimensional object. A prism, being a three-dimensional shape with length, width, and height, necessitates a measurement that encapsulates all three dimensions.

Prisms have a base shape that repeats through their height. Calculating volume involves finding the space enclosed within this repeating shape. By multiplying the area of the prism's base by its height.

Cubic units represent the volume of an object, akin to how square units represent area. They measure the number of unit cubes needed to fill the three-dimensional space within the prism. This measurement allows for precise quantification of space in a three-dimensional context.

complete the question

Which unit of measure can be used to express the volume of the prism?

a) unit squares

b) square units

c) cubic units

 d)  units

Answer: 0.72

Step-by-step explanation: I’ve drawn the triangle out and have assumed that 21 is adjacent and 29 is the hypotenuse. In that case, 21/29 = 0.724

Answer:

The diameter of the circle is 19 m

Step-by-step explanation:

The formula of the area of a circle is A = π r², where r is its radius

To find the diameter from the area of the circle equate the formula of the area by the value of the area to find r, then multiply r by 2 because the diameter of a circle is equal twice its radius

∵ The area of the circle is 90.25 π m²

∵ A = π r²

- Equate A by 90.25 π

∴ π r² = 90.25 π

- Divide both sides by π

∴ r² = 90.25

- Take √ for both sides

∴ r = 9.5

∵ The diameter of a circle is twice its radius

∴ d = 2 r

- Substitute r by 9.5

∴ d = 2(9.5)

∴ d = 19

The diameter of the circle is 19 m

Answer:

The diameter would be 19 m

Step-by-step explanation:

hope i helped

Answer:

11

Step-by-step explanation

u need to do the problem using order of operation

first u do division it is 10 divided by 10 which is 1

10 plus the answer of 10 divided by 10 which is 11

Answer:

11

Step-by-step explanation:

using PEMDAS:

first divide 10/10 and then you get 1+1 which equals 11

Answer:

turn the percentage into a decmial and then multiply the money

Answer:

3,247,695

Step-by-step explanation:

We want the coefficient of  the term with  x^8

So  Use Newton's Binomial Expansion formula

Formula is  (x + y) ^n  =   Sum for i=0 to n     (n choose i)   x^(n-i)*y^i

here   (x^2  + 3) ^ 12

( 12 choose i) *  (x^2)^(12-i) * (3)^i

i needs to equal 8  for us to get  x^8

(12 choose 8) * (x^2)^(12-8) * (3^8)

= (12 choose 8) * x^8  * (3^8)

so  a = (12 choose 8) * [tex]3^{8}[/tex]

a =  (12! /(8! * 4!) ) * [tex]3^{8}[/tex]

a = ( 12*11*10*9/  4*3*2*1)  * [tex]3^{8}[/tex]

a =  (11*5*9) * [tex]3^{8}[/tex]

a = 11*5*9 * 6561

a = 3,247,695

Final answer:

To solve this problem, we can set up an equation and solve it to find the number. The number is -6.

Explanation:

To solve this problem, let's set up an equation. Let's assume the number is represented by x. The problem states that one third of the number increased by 7 is five, so we can write the equation as:

(1/3)x + 7 = 5

To solve for x, we can subtract 7 from both sides of the equation:

(1/3)x = 5 - 7

Next, we simplify the right side of the equation:

(1/3)x = -2

Finally, to isolate x, we multiply both sides of the equation by 3:

x = -2 * 3

Therefore, the number is -6.

Answer:

B. f(x) = 884 • [tex]1.22^{x}[/tex]

Step-by-step explanation:

I think your question missed key information, allow me to add in and hope it will fit the orginal one. Please have a look at the attached photo

My answer:

Given that:

The following functions could model this situation is:

B. f(x) = 884 • [tex]1.22^{x}[/tex] where:

884 is a profit its first year

1.22 growth rate in revenue

x  represents the number of years in operation

Hope it will find you well.

Answer:

50%

Step-by-step explanation:

no matter how many times it is flip you will get heads or tails.

Answer:

50%

Step-by-step explanation:

two sides 1/2= 50%

Answer:

The simplified expression that represents the cost of her purchase is "5x + 27"

Step-by-step explanation:

Since Mikayla bought five shirts each costing $x we need to multiply the number of shirts by the cost, so 5*x, but since three of these shirts came with and additional top that costs $9 we need to take those into account. So the expression that represents the cost of her purchase is:

cost of purchase = 5*x + 3*9

cost of purchase = 5x + 27

Answer:

5x + 27

Step-by-step explanation:

Since Mikayla bought five shirts each costing $x it would be 5x

->if  three of the five came with a matching top for an additional $9 each, it would be 3 x 9.

therefore, the expression that represents the cost of her purchase is:

Total cost of purchase = 5x + (3 x 9)

Total cost of purchase = 5x + 27

Answer: 54

Step-by-step explanation:

Answer:

The teacher will have to give out 54 pencils

Step-by-step explanation:

there 9 children in the class. each student gets 6 pencils.

9 times 6 = 54

Final answer:

An earthquake with a magnitude of 8 is 100 times stronger than an earthquake with a magnitude of 6, as each whole number increase on the Richter scale represents a 10-fold increase in energy released.

Explanation:

The formula m=log(I/S) determines the magnitude of an earthquake, where I is the intensity of the earthquake and S is the intensity of a standard earthquake. To calculate how many times stronger an earthquake with a magnitude of 8 is than an earthquake with a magnitude of 6, we use the fact that each whole number increase on the Richter scale represents a 10-fold increase in the amount of energy released.

So, for an increase of one unit in magnitude:
10^1 = 10 times stronger
For an increase of two units in magnitude (from magnitude 6 to magnitude 8):
10^2 = 100 times stronger

Therefore, an earthquake with a magnitude of 8 is 100 times stronger than an earthquake with a magnitude of 6 when considering the energy released.

An earthquake with a magnitude of 8 is 1.33 times stronger than an earthquake with a magnitude of 6.

1. Understand the formula:

The formula m = log(I/S) relates the magnitude (m) of an earthquake to its intensity (I) and the intensity of a standard earthquake (S). The logarithm used is typically base-10.

2. Substitute the values:

We are given that the magnitude of the two earthquakes are 8 and 6. Let's substitute these values into the formula:

Earthquake 1: m1 = log(I1/S) (magnitude 8)

Earthquake 2: m2 = log(I2/S) (magnitude 6)

3. Simplify the equation:

We want to find the ratio of the intensities (I1/I2). To do this, we can manipulate the equations and solve for I1/I2:

Divide both equations by m2 (magnitude of earthquake 2):

m1 / m2 = log(I1/S) / log(I2/S)

Since both sides of the equation have the same base (10), we can equate the exponents:

m1 / m2 = I1/I2

4. Calculate the ratio:

Now, plug in the magnitudes (m1 = 8, m2 = 6):

8 / 6 = I1/I2

5. Solve for the ratio:

Simplify the fraction:

I1/I2 = 4/3

Therefore, an earthquake with a magnitude of 8 is 1.33 times stronger than an earthquake with a magnitude of 6.

Answer:

6/30=0.2 so 0.2 miles per minute

8/0.2=40 minutes

You can also check 30/6=5 so the conversion is 5

8 x 5 = 40 minutes.

Step-by-step explanation:

Hope this helps can I have brainliest

If on rainy days, Francesca likes to ride the stationary bike at the gym. Yesterday, she rode for 30 minutes and covered 6 miles. Today, she plans to ride 8 miles.  If she rides at the same rate, how many minutes will it take Francesca to ride today will be 40 minutes

First step is to formulate

8×30÷6

Now let determine the how many minutes will it take Francesca to ride today

Number of minutes=8×30÷6

Number of minutes=8×6

Number of minutes=40 minutes

Inconclusion if on rainy days, Francesca likes to ride the stationary bike at the gym. Yesterday, she rode for 30 minutes and covered 6 miles. Today, she plans to ride 8 miles.  If she rides at the same rate, how many minutes will it take Francesca to ride today will be 40 minutes.

Learn more here:

https://brainly.com/question/17023521

Answer:

The population is 168,900,000 to the nearest hundred thousand

Step-by-step explanation:

In this question, we are tasked with calculating the population of Brazil given its population in 1995 and her growth rate per decade.

Mathematically, we use an exponential function to calculate this population.

This can be written as P = I(1 + r)^n

where P is the population in 2015 which we are looking for,

I is the initial population which is 162,300,000

r is the rate of increase per decade given as 2% = 2/100 = 0.02,

n is the number of times between the years we are expecting this growth. The difference between the years 2015 and 1995 is 20 years which signifies 2 decades(1 decade is 10 years). Thus our n is 2

We plug these values into the equation above;

P = 162,300,000(1+0.02)^2

P = 162,300,000(1.02)^2

P = 168,856,920 which is 168,900,000 to the nearest hundred thousand

Answer:

D. The data points are close to the mean

Step-by-step explanation:

given data

mean absolute deviation = 0.1

Answer:

Determinant = -12

Step-by-step explanation:

rewrite the system as

-2 =  2x - 3y  + 0z

0 =  0x +  y - 2z

1 =  -3x + 2y   - z

then the coefficient matrix is

{  [2,  -3,   0]

  [0,   1,    -2]

  [-3,  2,   -1]  }

to find determinant

{  [2,  -3,   0]    ,   2,    -3

  [0,   1,    -2]   ,    0,     1

  [-3,  2,   -1]  },     -3,     2

determinant  =   2*1*-1  +  (-3 * -2 * -3)  +   (0*0*2)  -  0  -  (2*-2*2)  - 0

determinant = -2  - 18  + 0  - 0 + 8 =   -12

Each sphere of ice has a radius of 2cm

one tray makes 6 spheres

What is the total volume of ice the tray can make at one time?

Total volume of each sphere is 33.51 cm^3

The tray can hold 6 of these at a time

33.5 * 6

201 cm^3 total volume of ice that the tray can make at one time

Written in pi 

64  cm^3

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Answer: Its 64[tex]\pi[/tex]!!!

Step-by-step explanation:

Answer:

30 ft^2

Step-by-step explanation:

Area of rectangle is length x width

= 15ft x 2ft = 30 ft^2

Answer:The answer is the 2nd graph cuh

Step-by-step explanation:

Answer:the second graph

Step-by-step explanation:

Answer:

The area of a cover that will fit on the larger tank is 6 square inches

Step-by-step explanation:

step 1

Find the scale factor

we know that

If two figures are similar, then the ratio of its Volumes is equal to the scale factor cubed

Let

z ---> the scale factor

so

[tex]z^3=\frac{64}{8}=8[/tex]

[tex]z=2[/tex]

step 2

we know that

If two figures are similar, then the ratio of its areas is equal to the scale factor squared

Let

z ---> the scale factor

x ---> the area of a cover that will fit on the larger tank

y ---> the area of a cover that will fit on the smaller tank

so

[tex]z^2=\frac{x}{y}[/tex]

we have

[tex]z=2\\y=1.5\ ft^2[/tex]

substitute the given values

[tex]2^2=\frac{x}{1.5}[/tex]

solve for x

[tex]x=4(1.5)=6\ ft^2[/tex]

The area of the cover that will fit on the larger aquarium is approximately 12 square feet, calculated by multiplying the area of the smaller cover by the square of the scaling factor for linear dimensions (≈ 2.83) due to the difference in volume.

To find the area of a cover that will fit on the larger aquarium, we begin by understanding that the area scales by the square of the linear dimensions.

Since the volume of the larger aquarium is 64 gallons and the smaller one is 8 gallons, the volume scales by a factor of 64/8 = 8. Taking the square root of 8 gives us the scaling factor for the linear dimensions, which is sqrt(8) ≈ 2.83. The larger tank's cover will therefore need to increase by this scaling factor squared for its area.

To calculate the area of the larger tank's cover, we multiply the area of the smaller cover by this scaling factor squared: 1.5 ft2 * 2.832 ≈ 12 ft2. Thus, the cover for the larger tank should be approximately 12 ft2 in area. This demonstrates the concept that area is proportional to the square of the linear dimensions when scaling similar shapes.

Answer:

The ordered pair is [tex](-2,3)[/tex]

Step-by-step explanation:

[tex] y=x+5\\

y=-2x-1\\

\implies x+5=-2x-1\\

\implies 3x=-6\\

\boxed{x=-2}\\

\implies y=-2+5=\boxed {3}\\[/tex]

Answer:

(-2,3)

Step-by-step explanation:

Set the two equations equal to each other since they both equal y

x + 5 = -2x - 1

+2x      +2x          Add 2x to both sides

3x + 5 = -1

     - 5   - 5          Subtract 5 from both sides

3x = -6                 Divide both sides by 3

x = -2

Plug this into one of the original equations

y = x + 5

y = -2 + 5              Add

y = 3

Answer: The exterior angle, D, is supplementary to the adjacent interior angle, C. Together, they form a straight line, measuring 180°. The measure of the remote interior angles, A and B are equal to the measure of the exterior angle D.

Step-by-step explanation: I just did the assignment.

Answer:

Sample answer: The exterior angle, D, is supplementary to the adjacent interior angle, C. Together, they form a straight line, measuring 180°. The measure of the remote interior angles, A and B are equal to the measure of the exterior angle D.

Step-by-step explanation:

Final answer:

By using the ratio of 4:5 for the amounts that Jamie and her sister save, we calculate that since Jamie has $20, her sister has $25 in her account.

Explanation:

To find out how much money Jamie's sister has in her account, we need to first understand the ratio of the amounts they save. For every four dollars that Jamie saves, her sister saves five dollars. This gives us a ratio of 4:5.

Since Jamie has $20 in her account, we can determine how many times four dollars fits into twenty dollars to find out how many 'units' of savings Jamie has made. We do this by dividing 20 by 4, which equals 5. So, Jamie has saved 5 units of 4 dollars each.

Knowing that each unit for Jamie's sister is $5, we calculate the total amount for her sister by multiplying 5 units with the sister's $5, which equals $25. Therefore, Jamie's sister has $25 in her account.

Final answer:

For every $4 Jamie saves, her sister saves $5. Jamie has $20, which is equal to 5 units of $4. Therefore, Jamie's sister has saved 5 units of $5, which amounts to $25.

Explanation:

The question asks how much money Jamie's sister would have in her account, given that Jamie has $20 and for every four dollars that Jamie saves, her sister saves five dollars. To find the amount Jamie's sister has saved, we use the ratio of their savings. Since Jamie has $20 and saves $4 for every $5 her sister saves, we can calculate the amount Jamie's sister has saved using the following steps:

First, determine how many 'four dollar' units Jamie has saved. She has saved $20, so that's $20/$4 = 5 units.

Since Jamie's sister saves $5 for each of these units, we multiply the number of units by $5 to find her savings, which is 5 units * $5/unit = $25.

Therefore, Jamie's sister has $25 in her account.

Answer:

V(t) = 25000 * (0.815)^t

The depreciation from year 3 to year 4 was $2503.71

Step-by-step explanation:

We can model V(t) as an exponencial function:

V(t) = Vo * (1+r)^t

Where Vo is the inicial value of the car, r is the depreciation rate and t is the amount of years.

We have that Vo = 25000, r = -18.5% = -0.185, so:

V(t) = 25000 * (1-0.185)^t

V(t) = 25000 * (0.815)^t

In year 3, we have:

V(3) = 25000 * (0.815)^3 = 13533.58

In year 4, we have:

V(4) = 25000 * (0.815)^4 = 11029.87

The depreciation from year 3 to year 4 was:

V(3) - V(4) = 13533.58 - 11029.87 = $2503.71

The depreciation from year 3 to year 4 was $2503.71

The standard exponential function is expressed as:

[tex]y=a(1\pm r)^t[/tex]

r is the rate

t is the time

Given the following parameters

a = 25000,

r = -18.5% = -0.185,

Substitute into the formula

y = 25000 * (1-0.185)^t

y = 25000 * (0.815)^t

In year 3, we have:

y(3) = 25000 * (0.815)^3 = 13533.58

In year 4, we have:

y(4) = 25000 * (0.815)^4 = 11029.87

The depreciation from year 3 to year 4 was:

y(3) - y(4) = 13533.58 - 11029.87 = $2503.71

The depreciation from year 3 to year 4 was $2503.71

Learn more on depreciation here: https://brainly.com/question/25785586

Answer:

The approximated length of arc x is 4 inches ⇒ C

Step-by-step explanation:

That means the diameter of the inner circle is less than the diameter of the outer circle by 4 inches (2 in from each side)

The circumference of the inner circles formed from 20 congruent arcs of length x inches

Now let us find x

The formula of the circumference of a circle is C = π d, where d is the diameter of the circle

∵ The diameter of the inner circle is 24 inches

∴ d = 24

∴ C = 24 π

∵ C = 20 x

- Equate 20 x by 24 π

∴ 20 x = 24 π

- Divide both sides by 20

∴ x = 3.769911184

- Round it to the nearest unit

∴ x ≅ 4

The approximated length of arc x is 4 inches

Answer:

4

Step-by-step explanation:

edg

Answer:

4

Step-by-step explanation:

i just got it right