PLEASE HELP! I NEED THIS DONE BY TOMORROW!
1. In January, a mobile phone shop sold 100 phones. In February, they sold 92 phones. Represent this difference as a percentage change.
2. A piece is cut from a 130cm length of wood so that the remaining length is 104cm. What percentage of the wood has been cut off?
3. There are now 30 boys in a class that originally had 24 boys in it. What was the percentage increase in the number of boys in the class?
4. Last year, there were 300 students in Year 7. This year there are 315 students. Show that this is a 5% increase.
5. A piece of art was bought for £600. Six months later, it was sold for £675. What percentage of profit did the seller make?
6. In a sale, trainers originally costing £70 are reduced to £49. Calculate the percentage change.
7. Josh invests £3500. When his investment matures, he receives £4200. Work out the percentage
increase in his investment.
8. A car company bought a car for £8000. Two years later they sold the car for £7200. Calculate their
percentage loss.

Answer:

3.3507/ 3.35 (round off)

Step-by-step explanation:

Hope it helps :)

Answer:

[tex]C=69.1^{\circ}[/tex]

Step-by-step explanation:

The Law of Cosines is given as:

[tex]c^2=a^2+b^2-2ab\cos C[/tex].

Plugging in given values, we get:

[tex]16^2=8^2+17^2-2\cdot 8\cdot 17\cdot \cos C,\\\cos C=\frac{-97}{-272},\\C=\arccos(\frac{97}{272}),\\C=\fbox{$69.1^{\circ}$}[/tex].

Answer:

2(x+5y+3)

Step-by-step explanation:

first you collect the like terms 2x+3y+6+7y.

Answer:

2(x+5y+3)

Step-by-step explanation:

i did it

Answer:

y=-5x+3

Step-by-step explanation:

5x+y=3

sub 5x from each side

y=-5x+3

Answer:

its option 2

step-by-step explanation:

Answer:  False

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Explanation:

To see if the x value is a solution or not, we plug it into the equation given

2x+7 = 30 .... original equation

2*3 + 7 = 30 .... replace every x with 3, since we claim that x = 3

6 + 7 = 30 .... multiply 2 and 3 to get 6

13 = 30 ...... add 6 and 7 to get 13

We get two different numbers on either side, so the last equation is not true. We get a contradiction or false statement. So the original equation is false when x = 3. Therefore, x = 3 is not the solution.

That's why the overall claim is false.

Answer:

10 years

Step-by-step explanation:

Step-by-step explanation:

Ummm D

Answer:

46

Step-by-step explanation:

It will help :)

Answer:

46

Step-by-step explanation:

RIGHT ON EDGE~

Answer: 73

Step-by-step explanation:

so i took what the angle was for the 107 and subtracted it from 180 because that's always how I did it i'm not positive if its correct but I think that's how you do it since there all the same angles on the bottom so M and Q match and the two top angles match so I think it would end up being 73 sorry if this isn't to much help.

Answer:

Yesenia is 0.25t+4 inches tall after August.

Step-by-step explanation:

Given that:

Height of Yesenia in August = 4 feet tall

Growth rate since August = 0.25 inches

Number of months after August = t

According to given statement;

Height after August = Growth rate * Number of months + Height in August

Height after August = 0.25t + 4

Hence,

Yesenia is 0.25t+4 inches tall after August.

Answer: No, this is not a function.

In a function, there can be no overlapping on the y-axis.

Answer:

Mike pays the most.

Step-by-step explanation:

Joe pays 30%, given, and Mike pays 2/5, also given. You can covert 2/5. into a percentage by multiply both the numerator and denominator by 20 which gives you 40/100 = 40%. If Mike and Joe combined pay 40%+30% = 70%, then Tony only pays 30%. Therefore Mike would pay the most.

Answer: he baked 69 muffins

Step-by-step explanation:

Answer:

Hello, hope you had a good day your, answer is 2.511 Miles.

Step-by-step explanation:

so first lets take 2.7/100 = .027

then take .027 times 93 which gives you 2.511.

Answer:

1/56

Step-by-step explanation:

ploz brainliestt

Answer:

Answer:

35 square feet

Step-by-step explanation:

Step-by-step explanation:

Original x-value = 21

New x-value = 21 * (-1/7) = -3.

Original y-value = 28

New y-value = 28 * (-1/7) = -4.

Hence the coordinates of the new point is (-3,-4).

Answer:

Original value of x-axis =21

New value of x-axis = 21×(-1/7) = -3

Original value of y-axis =28

New value of y-axis = 28×(-1/7) = -4

Hence, the new coordinate is (-3,-4).

Answer:

Answer:

[tex]\$3463.70[/tex]

Step-by-step explanation:

Start by finding the total surface area of one block. The surface area of this half-cylinder is:

[tex]2\cdot\frac{1}{2}r^2\pi+\frac{1}{2}\cdot2r\pi\cdot h[/tex]

Since both radius and height are given, we can solve the equation:

[tex](1.5)^2\cdot \pi +1.5 \cdot \pi \cdot 4 \approx \fbox{$25.9\:\mathrm{cm^2}$}[/tex].

Since the company is painting 257 of these, the total surface area of all the blocks will be:

[tex]({(1.5)^2\cdot \pi + 1.5 \cdot \pi \cdot 4)\cdot 257\approx \fbox{$6660\:\mathrm{cm^2}$}[/tex].

Each square centimeter costs $0.52, so the total cost the company will have to pay is:

[tex]({(1.5)^2\cdot \pi + 1.5 \cdot \pi \cdot 4)\cdot 257\cdot 0.52\approx \fbox{$\$3463.70$}[/tex].

Answer:

49i^3u−21i^3x+9x

Step-by-step explanation:

Answer:  2 7/9

Step-by-step explanation:

too lazy to show the work lol, but hope this helped!

Answer the first is opposite and other is same

Step-by-step explanation:

Answer:

When (-1,-4) is substituted into the second equation, the equation  is true.

The ordered pair (-1,-4) is a solution to the system of linear  equations.

When (-1,-4) is substituted into the first equation, the equation is  true.

Step-by-step explanation:

Given

[tex]x - y = 3[/tex]

[tex]7x - y = -3[/tex]

Required

What is true about [tex](x,y) = (-1,-4)[/tex]

To do this, we substitute -1 for x and -4 for y in both equations;

For [tex]x - y = 3[/tex]

[tex]-1 - (-4) = 3[/tex]

[tex]-1 + 4 = 3[/tex]

[tex]3 = 3[/tex]

Hence: [tex](-1,-4)[/tex] is true for [tex]x - y = 3[/tex]

For [tex]7x - y = -3[/tex]

[tex]7(-1) - (-4) = -3[/tex]

[tex]-7 +4 = -3[/tex]

[tex]-3 = -3[/tex]

Hence: [tex](-1,-4)[/tex] is true for [tex]7x - y = -3[/tex]

Answer:

g=-4

Step-by-step explanation:

Given:

Amount spent on 2 DVDs = $41.75

Sales tax = $3.15

Coupon = $1.00 off

To find:

The cost of each DVD.

Solution:

Let x be the cost of each DVD.

Then, cost of two DVDs = 2x

Amount spent of 2 DVDs = Cost of 2 DVDs + Sales tax - Coupon discount

[tex]41.75=2x+3.15-1.00[/tex]

[tex]41.75=2x+2.15[/tex]

[tex]41.75-2.15=2x[/tex]

[tex]39.6=2x[/tex]

Divide both sides by 2.

[tex]\dfrac{39.6}{2}=x[/tex]

[tex]19.8=x[/tex]

Therefore, the cost of each DVD is $19.8.