anyone help??

ive friends take a maths test
Adam, Brandon, Chen together scored 200 marks
Brandon, Chen and Damion together scored 215
Chen, Damion, Erica together scored 224
Damion and Erica scored more than Chen
The five of them together scored 350 marks

What are their individual scores

Answer:

area = 186.984

Step-by-step explanation:

The 3 rectangular surfaces are simply L * W of each so

left surface = 5.5 * 6.2 = 34.1

right surface = 5.5 * 8.5 = 46.75

bottom surface = 5.5 * 9.8 = 53.9

The front and back are the same so

front = 1/2 base * heigth = 1/2 * 9.8 * 5.33 = 26.117

front + back = 2 * 26.117 = 52.234

total = sum them all up = 34.1 + 46.75 + 53.9 + 52.234 = 186.984

Answer:

SA;

Area that will be covered with blue paint = 486 ft²

Step-by-step explanation:

✔️The four walls of Frank's room is to be covered with blue paint, therefore, it is a Surface area (SA) problem.

✔️Solve:

The number of square feet to be covered with blue paint = the surface area of the 4 faces

✔️Two of the faces have the following equal dimensions:

Length = 15 ft; height = 9ft

Surface area of the two faces = 2(15*9)

= 270 ft²

✔️The other two faces have the following equal dimensions:

Length = 12 ft, height = 9 ft

S.A = 2(12*9)

S.A = 216 ft²

Total area of the wall to be covered with blue paint = 270 + 216 = 486 ft²

Answer:

Randomly selecting a six of diamonds - 1 / 52

Randomly selecting a 7, 8, 9 or 10 - 4 / 13

Step-by-step explanation:

There is only 1 six of diamonds in a standard deck of cards. There are 52 cards in a deck, thus the probability of pulling a six of diamonds is 1 in 52.

There are 4 of each card in a deck. so they are 4 7's, 4 8's. 4 9's and 4 10's. And there are a total of 52 cards in a deck. So the probability of pulling a 7,8,9 or 10 are 4 + 4 + 4 + 4 in 52

4 + 4 + 4 + 4 = 16

16 / 52 simplified is 4 / 13 Therefore the is a 4 in 13 chance of pulling a 7 8 9 or 10

The other ones are correct

Answer:

3400

Step-by-step explanation:

Multiply 52 times 200 and then subtract 200×35

Answer:

Your total gain would be $3400

Step-by-step explanation:

$35*200=7000

52*200=10400

10400-7000=3400

Answer:

based length times based width times pyramid height

((6 cm) (4 cm) (4cm) ) 3

= 32 cm3

Answer: 90% of people marry there 7th grade love. since u have read this, u will be told good news tonight. if u don't pass this on nine comments your worst week starts now this isn't fake. apparently if u copy and paste this on ten comments in the next ten minutes you will have the best day of your life tomorrow. you will either get kissed or asked out in the next 53 minutes someone will say i love you.

Step-by-step explanation:

Answer:

un pequeño libro o revista que contiene imágenes e información sobre un producto o servicio

Answer: See explanation

Step-by-step explanation:

a. Predict the sales resulting from a $15,000 investment in inventory and an advertising budget of $10,000.

To solve this, in the regression equation, we have to replace x1 with 15 and then replace x2 with 10. This will be:

y = 25 + 10x1 + 8x2.

y = 25 + 10(15) + 8(10)

y = 25 + 150 + 80

y = 255

Therefore, the predicted sales is 255.

b. Interpret b1 and b2 in this estimated regression equation.

A change in b1 which is the inventory investment will bring about a change of 10 units in the sales as long as other values are constant.

A change in b2 which is the Advertising expenditure will bring about a change of 8 units in the sales as long as other values are constant.

Answer:

-14.7

Step-by-step explanation:

Answer:

- 14.7

Step-by-step explanation:

- 4² + 1.3

- 16 + 1.3

- 14.7

9514 1404 393

Answer:

  C.  13

Step-by-step explanation:

Put 4 where y is in the equation and do the arithmetic.

  [tex]p(y)=\dfrac{4y}{2}+5\\\\p(4)=\dfrac{4(4)}{2}+5 = \dfrac{16}{2}+5=8+5\\\\\boxed{p(4)=13}[/tex]

Answer:

a = base × height

= 100yds × 52yds

= 5200 yds^2

Answer:

um sorry if I'm wrong....C?

Step-by-step explanation:

Answer:

A

Step-by-step explanation:

trust

Answer:

B.

200.96 cm2

Step-by-step explanation:

A≈201.06cm²

Solution

A=πr2=π·82≈201.06193cm²

Answer:

there is no profit there is loss because CP is greater than SP

Step-by-step explanation:

loss=CP-SP

=Rs480-Rs420

=Rs60

loss%=loss/cp*100%

=60/480*100%

=6000/480

=12.5%

Answer:

C.  f(x) = |x + 5| - 1

Answer:

B. ACB AND ACD

Step-by-step explanation:

since you need to prove, you need to show that the figure can work on any 2 triangles… hope it helps.

Answer:

Triangle has a greater perimeter.  

Step-by-step explanation:

Triangle perimeter = 21cm

Add the sides.

Square perimeter = 16cm

Add the sides (since it's a square the sides are the same.)

Answer:

The demand reduces by $7.12 per month

Step-by-step explanation:

Given

[tex]p\to price[/tex]

[tex]x \to demand[/tex]

[tex]2x^2+5xp+50p^2=24800.[/tex]

[tex]p =10; \frac{dp}{dt} = 2[/tex]

Required

Determine the rate of change of demand

We have:

[tex]2x^2+5xp+50p^2=24800.[/tex]

Differentiate with respect to time

[tex]4x\frac{dx}{dt} + 5x\frac{dp}{dt} + 5p\frac{dx}{dt} + 100p\frac{dp}{dt} = 0[/tex]

Collect like terms

[tex]4x\frac{dx}{dt} + 5p\frac{dx}{dt} = -5x\frac{dp}{dt} - 100p\frac{dp}{dt}[/tex]

Factorize

[tex]\frac{dx}{dt}(4x + 5p) = -5(x + 20p)\frac{dp}{dt}[/tex]

Solve for dx/dt

[tex]\frac{dx}{dt} = -\frac{5(x + 20p)}{4x + 5p}\cdot \frac{dp}{dt}[/tex]

Given that: [tex]2x^2+5xp+50p^2=24800.[/tex] and [tex]p = 10[/tex]

Solve for x

[tex]2x^2 + 5x * 10 + 50 * 10^2 = 24800[/tex]

[tex]2x^2 + 50x + 5000 = 24800[/tex]

Equate to 0

[tex]2x^2 + 50x + 5000 - 24800 =0[/tex]

[tex]2x^2 + 50x -19800 =0[/tex]

Using a quadratic calculator, we have:

[tex]x \approx -113\ and\ x\approx88[/tex]

Demand must be greater than 0;

So: [tex]x=88[/tex]

So, we have: [tex]x=88[/tex]; [tex]p =10; \frac{dp}{dt} = 2[/tex]

The rate of change of demand is:

[tex]\frac{dx}{dt} = -\frac{5(88 + 20*10)}{4*88 + 5*10} * 2[/tex]

[tex]\frac{dx}{dt} = -\frac{5(288)}{402} * 2[/tex]

[tex]\frac{dx}{dt} = -\frac{2880}{402}[/tex]

[tex]\frac{dx}{dt} \approx -7.16[/tex]

This implies that the demand reduces by $7.12 per month

9514 1404 393

Answer:

  see attached

Step-by-step explanation:

We take ~p∧~q∨r to mean (~p∧~q)∨r because "and" normally has precedence over "or." The (~p∧~q) term will only come into play when both p and q are false. It will only affect the outcome if r is also false. This condition is the last line of the table.

Answer:

The answer in this problem would be A

Answer:

Isreal

Step-by-step explanation:

15% of 1000 is 150x10=1500

2% of 3000 is 60x10=600

Answer:

44 cm^2

Step-by-step explanation:

A = area of rectangle + area of triangle

Look at the triangle. It has a base of 8 cm. we need the height.

Half of the trianfgle is a right triangle with hypotenuse 5 cm and leg 4 cm. Using the well-known Pythagorean triple 3, 4, 5, the other leg is 3 cm. That is the height of the triangle.

A = LW + (1/2)bh

A = 8 cm * 4 cm + (1/2)(8 cm)(3 cm)

A = 32 cm^2 + 12 cm^2

A = 44 cm^2

Answer: the shape is a rectangle

Step-by-step explanation:

Answer:

Rectangle :)

Step-by-step explanation:

Answer:

Hope this helps!!!

Step-by-step explanation:

Reflecting around x=1 never touches the y coordinate, and the x coordinate transforms - what was the distance to x=1 becomes the distance on the other side. In other words, if a point were at x=π, it's distance to x=1 was π−1 so the new location is π−1 to the left of x=1, i.e. 1−(π−1)=2−π.