Joann decides to paint one wall in her room with blackboard paint. The wall has the dimensions shown. A can of paint covers 25 square feet. How many cans of blackboard paint does Joann need for the wall?

Answer:

The Answer is D.

Step-by-step explanation:

You just need to plug in x for the first few, if it doesn't match go to the next option.

I tried this and figured out it's d in less than a minute.

Answer:

$21847

Step-by-step explanation:

Answer:

Carolyn did not distribute the -2 to both terms

Step-by-step explanation:

This was how Carolyn solved the second step:

[tex]3x-2(x+2)=7\\3x-2x+4=7[/tex]

She did multiply both terms in the parentheses by 2, but she did not change the sign for the 4. It should instead be -4 since a negative number multiplied by a positive number will always make a negative number.

Here is the correct way of solving it:

[tex]3x-2(x+2)=7\\3x-2x-4=7[/tex]

I hope this helps!

Answer:

The answer is C

Answer:

a= 6

b= 7

c= 8

d= 7

e= 6

Step-by-step explanation:

The table of height versus width shows that the values represented will be 6, 7, 8, 7, and 6.

From the given information, a = 6. Therefore, the value of b will be: = a + 1 = 6 + 1 = 7

The value of c will be:

= a + 2 = 6 + 2 = 8.

The value of d is also the value of b which will be 7. Lastly, the value of e will be 6.

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110 - 1 = 109

1 x 109 = 109

Answer:

[tex]110 - 1 = 109 \\ 200 - 91 = 109 \\ thank \: you[/tex]

Answer:

16

Step-by-step explanation:

sin = adjacent ÷ hypotenuse.

sin 45 = x ÷ 23

0.71 = x ÷ 23

0.71 × 23 = x

x = 16.26

~ 16.

Answer:

Step-by-step explanation:

using the Pythagorean theorem     a² + b² = c²

in this triangle a = x and b = x  so   x² + x²  = c²       c is the hypotenuse

                 x² + x²  = c²

                   2x² = c²             since c = 23 solve for x

                     x² =  c² / 2

                     x   =  ± √(c² / 2)

                     x   =  ± √(23² /2)

                          = ± √(529 /2)            

                          = ± √(264.5)            

                          =  16.26          x can't be negative

        That is correct but it doesn't answer the question

                 x = ??? / √xx

           sin 45  = √2 / 2  which equals    x / 23

                      √2 / 2  =    x / 23

                       x =  23 (√2 / 2)

                          =  23 (√2)  / 2             divide the √2 numerator and demenator

                          =  23 (√2)/√2 / (2 / √2)

                           = 23 / (2 / √2)

Sorry I have no idea what goes in the green box

Answer:

wouldn't it be 20 because it says nearest 10 20 is close to 20 and 15 closer to 20 too

Answer:

5 kg flour remains

Step-by-step explanation:

80% of the original 25 kg comes to 0.80(25 kg), or 20 kg.  We convert 80% to its decimal equivalent, 0.80, to get this result  

The amount of flour remaing is then (1.00 - 0.80)(25 kg), or 0.20(25 kg) = 5 kg.

5 kg flour remains.

Answer:

25 - 20 = 5 kg

Steps:

25×80/100 = 25×8/10 = 200/10 = 20 kg

25 - 20 = 5 kg

Answer:

Mode=11, Median=9, Mean=8.91, Range=6

Step-by-step explanation:

Answer:

Step-by-step explanation:

v(5v-7)=0

We multiply parentheses

5v^2-7v=0

a = 5; b = -7; c = 0;

Δ = b2-4ac

Δ = -72-4·5·0

Δ = 49

The delta value is higher than zero, so the equation has two solutions

We use following formulas to calculate our solutions:

v1 = −b−√Δ/2a

v2 = -b+√Δ/2a

√Δ = √49 = 7

v1 = -(−7)−7/2*5 = 0/10 = 0

v2 = -(−7)+7/2*5 = 14/10 =  1+2/5

[tex]\huge\text{Hey there!}[/tex]

[tex]\huge\textbf{We start off with this current equation:}[/tex]

[tex]\mathbf{v(5v - 7) = 0}[/tex]

[tex]\huge\textbf{Solving for the answer to your question:}[/tex]

[tex]\mathbf{v(5v - 7) = 0}[/tex]

[tex]\huge\textbf{Convert your current equation to:}[/tex]

[tex]\mathbf{1v(5v - 7) = 0}[/tex]

[tex]\huge\textbf{Distribute v or 1 within the parentheses:}[/tex]

[tex]\mathbf{\rightarrow 1v(5v) + 1v(-7) = 0}[/tex]

[tex]\mathbf{\rightarrow 5v^2 - 7v = 0}[/tex]

[tex]\huge\textbf{Factor the left side of the equation:}[/tex]

[tex]\mathbf{v(5v - 7) = 0}[/tex]

[tex]\huge\textbf{Fator each of the sides to equal to 0:}[/tex]

[tex]\mathbf{v = 0\ OR\ as\ in\ 5v - 7 = 0 }[/tex]

[tex]\huge\textbf{Simplify the current equation above:}[/tex]

[tex]\mathbf{v = 0\ or\ v = \dfrac{7}{5}}[/tex]

[tex]\huge\textbf{Thus, the answer should most likely be:}[/tex]

[tex]\huge\boxed{\mathsf{v = 0\ or\ v = \dfrac{7}{5}}}\huge\checkmark[/tex]

[tex]\huge\text{Good luck on your assignment \& enjoy your day!}[/tex]

Answer:

[tex]V=471\ \text{units}^3[/tex]

Step-by-step explanation:

Given that,

Radius of the cone, r = 5 units

Height of the cone, h = 6 units

We need to find the volume of the cone. The formula for the volume of the cone is given by :

[tex]V=\pi r^2 h[/tex]

Substitute all the values,

[tex]V=3.14\times 5^2\times 6\\\\V=471\ \text{units}^3[/tex]

So, the volume of the cone is [tex]471\ \text{units}^3[/tex].

Answer:

Diameter = 54 units

Step-by-step explanation:

Given:

Angle θ = 80'

Length of arc TV = 12π

Find:

Diameter

Computation:

Length of arc = [θ/360][2πr]

So,

12π = [80/360][2πr]

54 = 2r

r = 27

Diameter = 2r

So,

Diameter = 54 units

Answer:

16/5

Step-by-step explanation:

Answer:

2/1

Step-by-step explanation:

Use the equation m=[tex]\frac{y2-y1}{x2-x1}[/tex]

Answer:

Step-by-step explanation:

Answer:

the first one is 1 the second one is 28 /5/6

Step-by-step explanation:

trust me bro

Answer:

A= -5.6666 or -17/3

B= 28.8333 or 173/6

Step-by-step explanation:

Answer:

[tex] \bf \huge90[/tex]

Step-by-step explanation:

⟼ x/6 - 2 = 13

step 1 : Simplify both sides of the equation.

⟼ x/6 - 2 = 13

⟼ 1/6 x + - 2 = 13

⟼ 1/6 x - 2 = 13

step 2 : add 2 both sides

⟼ 1/6 x - 2 + 2 = 13 + 2

⟼ 1/6 x = 15

step 3 : Multiply both sides by 6.

⟼ 6 × (1/6 x) = (6) × (15)

⟼ 6/6 x = 90

⟼ x = 6/6 × 90

⟼ x = 90.

∴ x = 90.

lets take x = 90.

⟼ (90) / 6 - 2 = 13

⟼ 90/6 - 2 = 13

⟼ 15 - 2 = 13

⟼ 13 = 13.

Answer: $6.40

Step-by-step explanation: im just way too big brained

Answer:

$40

Step-by-step explanation:

32/(1-.2)=32/.80=40

Answer: 9

Step-by-step explanation:

If 19 students take history, 12 take economics and 5 take both:

19-5 = 14 students that take only history

12-5 = 7 students that take only economics

Therefore total number of students who either history, economics or history and economics: 14 + 7 + 5 = 26

Therefore students who take neither: 35 - 26 = 9

students who take neither: 35 - 26 = 9.

Subtraction is the process of taking away a number from another. It is a primary arithmetic operation that is denoted by a subtraction symbol (-) and is the method of calculating the difference between two numbers.

here, we have,

In a class of 35 students, 19 take history and

12 take economics. If 5 take both subjects,

now,

If 19 students take history, 12 take economics and 5 take both:

19-5 = 14 students that take only history

12-5 = 7 students that take only economics

Therefore total number of students who either history, economics or history and economics: 14 + 7 + 5 = 26

Therefore students who take neither: 35 - 26 = 9

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#SPJ2

Answer:

AB = 9.5 units

Step-by-step explanation:

Here, we want to find the measure of AB

To do this, we are going to make use of the sine rule

for the sine rule, the ratio of the measure of a side and the sine of the angle that faces the side is a constant value for a triangle

Thus, we have it that; in a triangle ABC

a/sin A = b/sin B = c/sin C

using the triangle given;

we need the measure of the angle at C

The sum of angles in a triangle is 180

thus;

C + 93 + 48 = 180

C = 180 - 93 -48

C = 39 degrees

Now, to get the value of AB;

AB/sin 39 = 15/sin 93

AB = (15 * sin 39)/sin 93

AB = 9.5 units

Answer:

Output, y = -1 when input, x = 30

Step-by-step explanation:

Given equation:

y = 14 - 0.5x

Where,

y = output

x = input

Find the output, y, when the input, x, is 30

y = 14 - 0.5x

y = 14 - 0.5(30)

y = 14 - 15

y = -1

Therefore,

Output, y = -1 when input, x = 30

Answer:

-1

Step-by-step explanation:

KHAN ACADEMY :)

I CAN FIND AN EXPLANATION IF NEEDED

Answer:

1646.4 m^2

Hope that helps! - And if you would like the steps, I can show them. :D

Step-by-step explanation:

Answer:

10=Z and 10=Y

Step-by-step explanation:

since it is a 45, 45, 90 triangle

both Z and Y will be the same length

the hypotenuse has a length of [tex]x\sqrt{2}[/tex] with x being the length of the legs

Since the length of this triangle's hypotenuse is [tex]10\sqrt{2}[/tex] the side length would be 10

Hope that helps :)

Answer:

20ml : 6ml: 15ml

Step-by-step explanation:

1000 milliters is 1 liter, so we would have to convert it to the ml so that it will all be in proportion. To simplify a ratio, divide by a number they can all be divided by. In this case, it was 10 first, so it made it 100: 30: 75. Then, to simplify it more, they can all be divided by 5, which is the lowest it can be since 20: 6: 15 have no numbers in common to be divided by.

Answer:

18.44%

Step-by-step explanation:

Let :

Percentage who rode bus to work last year = x

Percentage who ride bus to work this year = 27.1%

Percentage who ride bus to work this year = [percentage who rode bus to work last year + 47% of percentage who rode bus to work last year]

Mathematically ;

27.1% = x + 47% of x

0.271 = x + (0.47x)

0.271 = x + 0.47x

0.271 = 1.47x

x = 0.271 / 1.47

x = 0.1843537

x = 0.1843537 * 100%

x = 18.435%

x = 18.44%

Answer: the equation is

y=-2/7x +52/7 and the slope is -2/7

Step-by-step explanation: