PLEASE HELP IM FAILING MATH IT IS 6th GRADE ALGEBRA

Answer:

27 years old

Step-by-step explanation:

What I know

Let D = Dave, S = Sabrina, etc. Then:

(1) [tex]D=0.15S[/tex]

(2) [tex]L=0.75S[/tex]

(3) [tex]R=3.00D[/tex]

(4) [tex]D+S+L+R=141[/tex]

Want to find R. Taking equation 3 and rewriting equation 4, we get

[tex]R=3.00D[/tex]

[tex]R=141-D-S-L[/tex]

So if [tex]R=R[/tex], then

[tex]3D=141-D-S-L-R[/tex]

[tex]4D=141-S-L[/tex] by adding [tex]D[/tex] to both sides.

Using equation 1 and equation 2, I can rewrite everything in terms of [tex]S[/tex] and get:

[tex]4(0.15S)=141-S-0.75S[/tex]

[tex]0.6S=141-1.75S[/tex]

[tex]2.35S=141[/tex] by adding [tex]1.75S[/tex] to both sides.

[tex]S=60[/tex] by dividing 2.35 both sides.

Now that I know Sabrina's age, I'll work towards getting Rhianna's using equation 1 and equation 3:

[tex]D=0.15(60)=9[/tex]

[tex]R=3.00(9)=27[/tex]

Checking my work:

Dave: 9

Sabrina: 60

Luca: 45 (since 9+60+45+27=141)

Rhianna: 27

9 is 15% of 60

45 is 75% of 60

27 is 300% of 9

Answer:

50 because,

Step-by-step explanation:

9n means 9 times 6. Which equals to 54, subtract 4 to get 50

Answer:

50

Step-by-step explanation:

If n = 6 the equation becomes 9(6)-4 or 9 x 6 - 4

9 x 6 = 54

54 - 4 = 50

Thus, the answer is 50

Answer: c

Step-by-step explanation:

The expression that best represents Oliver making 8 withdraws $25 should be considered as 8(-25).

Since the positive and negative numbers to show his withdraw which expression best represents Oliver making 8 withdraws $25

So here the withdrawn amount should be $25

And, the earning is $8

So here the expression be like 8(-25).

Learn more about expression here: https://brainly.com/question/24422266

Answer:

No, it is not a right triangle.

Step-by-step explanation:

Using the property of the right triangle, square root (5^2 + 10^2) = 5root(5), and it is not equal to 15, so it is not a right triangle.

Answer:

$20.40 after the discount

Step-by-step explanation:

To find 15% of 24, you multiply 24 and 0.15, which gets you 3.6

Then, to find the price after the discount, you subtract the 15% (the 3.6). So, 24 - 3.6 = $20.40

Answer:

x+x+65+25= 180( Angle Sum Property)

2x+90=180

2x=90

x=45

∠A= 45

∠B= 45+65= 110

Step-by-step explanation:

Answer:

A

Step-by-step explanation:

Answer:

A

Step-by-step explanation:

Can I get brainly?

Answer:

Step-by-step explanation:

Triangle XYZ has been reflected across a line y = 1,

Therefore, line y = 1 will work like a mirror and all the distance of the points of the points from this line will be equal after the reflection about this line.

Distance of X from this line = 2 units

After reflection distance of X' from the line of reflection will be 2 units in opposite side.

Therefore, coordinates of X' will be (3, 3)

Answer:

It's 102

Step-by-step explanation:

in triangles they have to equal to 180

41+37=78

180-78=102

Answer:

A!

Step-by-step explanation:

10 cubic feets volume is equivalent to 25.85 inches.

Answer:

Option B

Step-by-step explanation:

Volume of a cube is:

[tex]A = s^3[/tex]

s - side length

All sides are the same length in a cube.

We are given the information that the total volume of the cube is 10 cubic feet.

[tex]10=s^3\\\\\sqrt[3]{10}=\sqrt[3]{s^3}\\\\\boxed{2.154435... = s}[/tex]

2.154435... ≈ 2.15

The approximate height of the cube is 2.15 inches.

Since the height of the shelf is 24 inches tall, the cube should be able to fit.

2.15 < 24

Option B should be the correct answer.

Hope this helps.

Answer:

Option D!

Step-by-step explanation:

Answer:

There's no expressions.

Answer: 7.5 miles per hour

Step-by-step explanation:

First speed was 3 miles per hour.

Second speed was 12 miles per hour.

To do an average, add both speeds and divide by two, which is the number of trips made.

= (3 + 12) / 2

= 15 / 2

= 7.5 miles per hour

Step-by-step explanation:

I'll do 2.

Alright,Alex let say we have factored a quadratic into two binomial, for example

[tex](5x + 3)(6x - 4)[/tex]

If we set both of those equal to zero

[tex](5x + 3)(6x + 4) = 0[/tex]

We can used the zero product property in this case to find the roots of the quadratic equation.

This means that

[tex]if \: ab = 0 \: then \: a = 0 \: and \: b = 0[/tex]

This means we set each binomal equal to zero to find it root.

[tex]5x + 3 = 0[/tex]

[tex]5x = - 3[/tex]

[tex]x = - \frac{3}{5} [/tex]

[tex]6x + 4 = 0[/tex]

[tex]6x = - 4[/tex]

[tex]x = - \frac{2}{3} [/tex]

So our roots are negative 3/5 and negative 2/3 using zero product property

Answer:

Step-by-step explanation:

Answer:

your answer will be 4/25

Step-by-step explanation:

.....

[tex] \sf Q) \frac{2 {}^{2} }{ {5}^{2} } = {?} [/tex]

[tex] \sf \implies \frac{2 {}^{2} }{ {5}^{2} }[/tex]

[tex] \sf \implies \frac{4}{25}[/tex]is the required answer.

Answer:

45 pints

Step-by-step explanation:

Answer:

first, arrange the numbers then classify the number into two like if there are 7 numbers classify into three then the middle one will be the median

Answer:

390 seniors

Step-by-step explanation:

13/20=.65

600x .65=390

9514 1404 393

Answer:

  (x, y) ⇒ (x -5, y +3)

Step-by-step explanation:

Pick a point on the original polygon. The extreme left point (at (1, 0)) will do.

Locate the corresponding image point on ABCDE. (It is point B(-4, 3).) Using coordinates, or counting grid squares, determine what must be added to the original point to get the image point.

Here, that addition is 5 squares left and 3 squares up:

  image - original = (-4, 3) -(1, 0) = (-5, 0)

So, the transformation rule adds -5 to each x-coordinate and 3 to each y-coordinate:

   (x, y) ⇒ (x -5, y +3)

Answer:

2.00 is your answer lol i think

Step-by-step explanation:

please mark as brainllest

Answer:

Given that the equation of the revenue is R=2x2+55x+10 and the equation of the cost is C=2x2 – 15x – 40, you will get the profit by subtracting the revenue from the cost: R-C=P. Therefore, P=(2x2+55x+10)-(2x2 – 15x – 40). You will get P=70x+50 where x is is the number of cellphones sold. If 240 cellphones are sold, then the profit is 16850 dollars.

Step-by-step explanation:

The profit expression is 70x + 50 and the profit if 240 cell phones are sold is $16,850

where,

x = number of cell phones sold.

Profit = Revenue - cost

= (2x² + 55x + 10) - (2x² – 15x – 40)

= 2x² + 55x + 10 - 2x² + 15x + 40

Profit = 70x + 50

Profit = 70x + 50

= 70(240) + 50

= 16,800 + 50

= $16,850

Learn more about profit:

https://brainly.com/question/23103804

Answer:

Writing expressions | Math (article) | Khan Academy

Step-by-step explanation:

Answer:

The side length can be used to draw (0) unique triangles because the two side lengths (8 and 12) add together to a sum that is (less than) the third side length

Step-by-step explanation:

Answer:

X=5

Step-by-step explanation:

Answer:

60°

Step-by-step explanation:

<EAD is 180° as a whole

All that is needed is to subtract 100° and 20° from 180°

now you are left with x° which is 60° left over from the 180°

Answer:

8 times 34= 272

Step-by-step explanation:

Answer:

B. (4x+5)(16x2−20x+25)

Step-by-step explanation:

64x3+125

=(4x+5)(16x2−20x+25)

Answer:

B

Step-by-step explanation:

By using graph of a function, the graph of the equation y + 6 = x + 4 has been shown below

A function from A to B is a rule that assigns to each element of A a unique element of B. A is called the domain of the function and B is called the codomain of the function.

here, we have,

At first, it is important to know about function.

There are different operations on functions like addition, subtraction, multiplication, division and composition of functions.

Graph of a function f(x) is the collection of points of the form (x, f(x))

The equation is y + 6 = x + 4

y = x + 4 - 6

y = x - 2

The graph has been shown below

To learn more about graph of a function, refer to the link-

brainly.com/question/24335034

#SPJ7

Answer:

ab = 6

a+b = 5

Step-by-step explanation:

Answer:

the answer is B

Step-by-step explanation:

please makr brainliest