Witch value of x makes the equation x + 7 = 21 true ?

Answer:

$40 will be the total cost of the ribbon.

Step-by-step explanation:

To find the cost of ribbon to be put on the edges of rectangular banner, we need to:

1. Find the perimeter of the rectangle.

2. Multiply the perimeter with the per foot cost to find the total cost.

Let us find the perimeter first:

Perimeter of a rectangle is given as:

[tex]P = 2 \times \text{(length+width)}[/tex]

Here, the dimensions of rectangle are 4ft by 6ft.

So, perimeter = [tex]2 \times (4+6) \Rightarrow 20\ ft[/tex]

It is given that per foot cost is $2.

Total cost of the ribbon = [tex]2 \times 20 \Rightarrow $40[/tex]

$40 will be the total cost of the ribbon.

Answer:

the nature of the roots of an equation is real, distinct and irrational

Step-by-step explanation:

Given Data provided in the question according to the question is as follows:

[tex]2x^2 + 8x + 3 = 0[/tex]

where

a = 2  ,  b = 8 , c = 3

As we know that

Quadratic expression

[tex]ax^2 + bx +c = 0[/tex]

Delta = [tex]b^2 - 4ac[/tex]

[tex]= (8)^2 - 4 (2) (3)[/tex]

= 64 - 24

= 40

Here,

Delta > 0, it does not contain perfect square

Therefore the nature of the roots of an equation is real, distinct and irrational

Answer:

Probability = 0.500

Step-by-step explanation:

If it is given that the reader is a teen, we have a total of 80 readers, where 40 of those readers have Rowling as their favorite.

So the probability that the reader's favorite is Rowling given that the reader is a teen is the number of teen readers that have Rowling as favorite (40) over the total number of teen readers (80)

Probability = 40 / 80 = 0.500

Answer: (-4, -1)

Step-by-step explanation:

Starting at point (-4, -2) and translating 3 units up means we add 3 to -2.

So the new point is now (-4, 1).

Now we reflect over the x-axis which means the y-value of 1 becomes negative.

So the final point is (-4, -1)

Answer:

(-4,-1)

Step-by-step explanation:

when you translate it by 3 units up, it becomes (-4,-1). and when you reflect over the x axis, it becomes (-4,-1)

Answer:

The line of symmetry for function f is x = 2 and the line of symmetry for function g is x = 1.

The y-intercept of function f is greater than the y-intercept of function g.

Over the interval [2, 4], the average rate of change of function f is greater than the average rate of change of function g.

Answer:

your answer is -4!

Step-by-step explanation:

plz mark me brainliest

Answer:

6

Step-by-step explanation:

The upper quartile (also known as Q3) is the right most side of the BOX (where the box ends). In the question, it says the box is from 3 to 6 meaning that the box ends at 6.

I hope this helps!

Answer:

6

Step-by-step explanation:

The upper quartile is 6 because the box ends at 6 and that is the upper quartile which is sometimes also known as Q3

Answer:

1)     x-4y-22=-5

2)    y=-4x-34

Step-by-step explanation:

Answer:

B, 1 right angle

Step-by-step explanation:

Triangles don't have the same length of there sides. The sides are uneven which makes the triangle unique. Also, right triangles only have 1 right angle

Hope this helps

Mark brainliest pls

Answer:

B

Step-by-step explanation:

Another way you can think about it is by thinking about the total possible angle sum. The angles in a triangle must sum to 180, so if there are 2 or more right angles, then you either cant have a 3rd angle because thats already at or over 180 degrees. That is why it must be 1.

Answer:

The histogram for the data is attached below.

Step-by-step explanation:

The data for the number of houses Gregg the garbage man visited each day last week is as follows:

S = {12, 28, 33, 37, 23, 14, 9​}

In this case we need to create a histogram for the provided data.

According to the graph provided we know that the class intervals are:

CI = 0 - 10, 10 - 20, 20 - 30, 30 - 40

The frequency distribution table is as follows:

Class Interval     Frequency

    0 - 10                    1

   10 - 20                  2

  20 - 30                  2

  30 - 40                  2

The histogram for the data is attached below.

Answer:

This is from Khan Academy.

There are 1 squares in 0-10

There are 2 squares in 10-20

There are 2 squares in 20-30

There are 2 squares in 30-40

Answer:

30

Step-by-step explanation:

If 15/50 = x/100,

then 50x=1500,

and x-30

:-)

Answer:

7 and -5

Step-by-step explanation:

1. Factor: (x-7)(x+5)

2. Set both to zero and solve

Answer:

4x^2 -25

Step-by-step explanation:

(2x + 5)(2x - 5)

FOIL

first: 2x*2x = 4x^2

outer : 2x*-5 = -10x

inner : 5*2x = 10x

last: -5*5 = -25

Add them together

4x^2 -10x +10x -25

Combine terms

4x^2 -25

Answer:

4x²- 25

Step-by-step explanation:

Let's use the FOIL (First, Outer, Inner, Last) method to solve:

(2x + 5)(2x - 5)

FOIL

First:

(2x + 5)(2x - 5)

2x(2x)

= 4x²

FOIL

Outer:

(2x + 5)(2x - 5)

2x(-5)

= -10x

FOIL

Inner:

(2x + 5)(2x - 5)

5(2x)

= 10x

FOIL

Last:

(2x + 5)(2x - 5)

(5)(-5)

= -25

Let's put it all together:

4x² - 10x + 10x - 25

Combine like terms:

4x² - 10x + 10x - 25

4x²- 25

Therefore, the product is 4x²- 25.

Answer:

It could help Logan to first study the constitution and shape of this type of armor in order to make a mental image of the positions of the angles as well as the size.

Step-by-step explanation:

A previous study allows Logan to understand that these types of trusses have a triangular shape and are widely used in the construction of roofs, therefore Logan could use to draw this type of trusses.

Answer:[tex]\frac{x}{6}[/tex] + 5

Step-by-step explanation:

Answer:

x/6 + 5.

Step-by-step explanation:

The quotient of x and 5 is x/6.

Adding 5 we get:

x/6 + 5.

Answer:

Diana will be able to maek 12

Step-by-step explanation:

Answer:

DA

Step-by-step explanation:

Answer:

(a) (i) x + y ≤ 24

(ii) y ≥ 4 + x

(b) draw a graph with the coordinate given below:

* note that you must draw 2 lines in your graph as there are 2 linear inequalities

(i) (0,24) and (24,0)

(ii) (0,4) and (-4,0)

*when the sign is ≤ , shade below the drawen line on the graph.

*when the sign is ≥, shade above the drawen line on the graph.

(c) x=8

8 + y ≤ 24

y ≤ 16 ( maximum )

y ≥ 4+8

y ≥ 12 (minimum)

Answer:

CP - SP = LOSS when CP is more than SP

Answer:

True.

Step-by-step explanation:

That is exactly what a perimeter is. Hope this helps

Answer:

Option C is correct

Step-by-step explanation:

Given: A plane is descending onto the runway with an angle of depression of 55°. Also, it has 2.8 miles to go before landing.

To find: current altitude of the plane

Solution:

Consider the attached image.

In ΔABC,

[tex]\angle ACB=55^{\circ}[/tex] (Alternate interior angles)

For any angle [tex]\theta[/tex],

[tex]tan \theta[/tex] = side opposite to angle/side adjacent to angle

[tex]\tan C=\frac{AB}{BC}[/tex]

Put [tex]\angle C=55^{\circ}\,,\,BC=2.8\,\,miles[/tex]

[tex]AB=2.8\,\tan 55^{\circ}=3.999\approx 4\,\,miles[/tex]

So, the current altitude of the plane is 4 miles.

Answer:

The surface area of the cylinder is 251.2cm²

Step-by-step explanation:

To solve this problem we have to calculate the circle area and the lateral area

radius = half of diameter

r = 10/2 = 5cm

To calculate the area of ​​the circle we use the following formula

a = area

r = radius = 5cm

π = 3.14

a = π * r²

we replace with the known values

a = 3.14 * (5cm)²

a = 3.14 * 25cm²

a = 78.5cm²

The area of the circle is 78.5cm²

To calculate the lateral area of ​​the cylinder we use the following formula

a = area  =

h = heighti = 3cm

r = radius = 5cm

π = 3.14

a = 2 * π * r * h

we replace with the known values

a = 2 * 3.14 * 5cm * 3cm

a = 6.28 * 15cm²

a = 94.2cm²

The lateral area of ​​the cylinder is 94.2cm²

Now we add the lateral area of ​​the cylinder with 2 times the area of ​​the circle and obtain the area of ​​the cylinder

94.2cm²  + (2 * 78.5cm²) = 251.2cm²

The surface area of the cylinder is 251.2cm²

Answer:the answer is -17

Step-by-step explanation:

Answer:

x < 6.

Step-by-step explanation:

18 > 12+x

18 - 12 > x

x < 6.

The graph  will be a vertical dotted line passing through the point (6, 0) and shaded to the left.

Answer:

  [tex]\dfrac{\overline{RS}}{\overline{VU}}=\dfrac{\overline{ST}}{\overline{UT}}\quad\text{and}\quad\angle S\cong\angle U[/tex]

Step-by-step explanation:

To use the SAS similarity theorem, you must show proportionality between corresponding sides, and congruence of the angle between them.

The answer shown above is the only answer choice that mentions an angle.

__

Comment on other choices

Choice B shows the three sides are proportional, so would be useful if the SSS similarity theorem were to be invoked. It isn't helpful for the using the SAS similarity theorem.

Choices C and D get the proportion statements wrong.

Answer:

RS/VU=ST/UT and Angle S congruent Angle U

Answer:

− 4 b − 44

Step-by-step explanation:

Answer:

-4(b + 11)

Step-by-step explanation:

-4(b + 2) - 36    (multiply -4 into parentheses via distributive property)

= b(-4) + 2(-4) - 36

= -4b -8 - 36

= -4b - 44    (this could be an answer, but we can still simplify further by factoring out -4)

= -4(b + 11)

Answer:

Step-by-step explanation:

Adam plans to choose a video game from a section of the store where everything is 75% off.

The expression written by him for this situation is d - 0.75d.

Here, the part d represents the sale price before discount and the part 0.75d is the discount amount.

The expression written by Rena is 0.25d.

Here, the part 0.25d is the price after discount. Since 75% is the discount, the rate after disount is 25% and 25% of d is 0.25d.

Answer: -3

Step-by-step explanation:

-3^2=-3*-3=-9

Because the square of q is equal to -9, the square root of -9 is equal to q.

Because of this fact, we can find the square root of -9 to get our answer.

[tex]\sqrt{-9}[/tex] = 3 i.

Therefore, q is equal to 3 i or [tex]\sqrt{-9}[/tex].

Hope this helped! :)