plz help I will give brainiest, how would you solve 4x + 2y = 18 3x - 5y = 20 by elimination showing all of the work and the final answers

note; there are two equations there but they are in the same question

Answer:

B

Step-by-step explanation:

Surveying 30 7th graders would give biased results, because 4 seventh graders are running for class president, meaning that 7th graders would be more likely to vote for their fellow classmates who are running

Answer:

B

Step-by-step explanation:

Hoped This Helped you :]

Answer:

16cm^2

Step-by-step explanation:

Count all of the whole squares 1st

the do the ones at the sides

Answer: 16 units squared

If there is units for the grid, use those as your measurements, but if not, use each box to equal 1.

You can solve this by finding the area of a rectangle bigger than the original shape (straighten out diagonal lines)

Once you do this, count the units (boxes) of the length and width of the rectangle (5 X 4)

You would then multiply the length and width to find the area of the rectangle

5 * 4 = 20

..... But you still need to find the parallelogram so you have to subtract the space you filled in

Since the shape is a parallelogram, you can tell that the area filled in is equal on both sides, and when put together, they form a smaller rectangle

This rectangle would be 1 X 4

1 * 4 = 4

Then you have to subtract the smaller rectangle from the larger rectangle

20 - 4 = 16

Answer:

Graph A

Step-by-step explanation:

I graphed each of the inequalities on separate graphs below. When all the graphs are put together, they match Graph A.

The choice that matches the graph of the function as is defined to Graph A.

There are many tools we can use to find the information of the relation which was used to form the graph.

A graph contains data of which input maps to which output.

Analysis of this leads to the relations which were used to make it.

The given function are;

f(x)= 2 ,if 2 < x ≤ 4

f(x)= 4, if 4 < x ≤ 6

f(x)= 6  ,if 6 < x ≤ 8

This means that how we get the staircase pattern as shown in graph A. This is considered a piecewise function since we're graphing pieces of various other functions.

Hence, The choice that matches the graph of the function as is defined to Graph A.

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Answer:

3808

Step-by-step explanation:

Given the sequence: 13,19,25

First Term, a=13

Common Difference, d=19-13=25-19=6

Since we have a common difference, the sequence is an arithmetic sequence.

We determine the sum of any nth term of an arithmetic sequence using the formula:

[tex]S_n=\frac{n}{2}[2a+(n-1)d] \\n=34, a=13, d=6\\$Therefore:\\S_{34}=\frac{34}{2}[2(13)+(34-1)*6]\\=17[26+33*6]\\=17[26+198]\\=17*224\\S_{34}=3808[/tex]

The sum of the first 34 terms is 3808.

Answer:

[tex]\boxed{\sf \ 48 \ }[/tex]

Step-by-step explanation:

Hello,

the sum of all angles of the triangle at the left must be 180

so the last one is 180 - 80 - 60 = 40

and then the angle at the bottom left of the second triangle is 180 - 40 -72 = 180 - 112 = 68

and then the angle that we have to find is 180 - 64 - 68 = 48

hope this helps

Answer:

[tex]12.92cm^2[/tex]

Step-by-step explanation:

[tex]A=\frac{h_bb}{2} \\=\frac{3.4*7.6}{2} \\12.92cm^2[/tex]

Answer:

12.92 cm²

Step-by-step explanation:

The area (A) of a triangle is calculated as

A = [tex]\frac{1}{2}[/tex] bh ( b is the base and h the perpendicular height )

Here b = 7.6 and h = 3.4 , thus

A = [tex]\frac{1}{2}[/tex] × 7.6 × 3.4 = 3.8 × 3.4 = 12.92 cm²

Answer:

The mean is 65.72 , median  is 81 and mode is 52  

Step-by-step explanation:

Stem         Leaf

5                2, 2, 2.

8.                1,5,9

9.                3,4,6

1.                 2,7

Number : 52,52,52,81,85,89,93,94,96,12,17

Arrange in ascending order :

12,17,52,52,52,81,85,89,93,94,96

[tex]Mean = \frac{\text{Sum of all observations}}{\text{No. of observations}}\\Mean =\frac{12+17+52+52+52+81+85+89+93+94+96}{11}[/tex]

Mean =65.72

[tex]Median = \frac{n+1}{2} \text{th term}=\frac{11+1}{2}=6 \text{th term} = 81[/tex]

Mode = most occurring number = 52

Hence The mean is 65.72 , median  is 81 and mode is 52  

Answer:

option a

Step-by-step explanation: y+y=114 (exterior angle property)

2y=114

y =114/2

y = 57

The measure of angle 'y' in the triangle is 57 degrees.

The figure in the image is a triangle.

From the diagram:

Angle 1 = y degrees

Angle 2 = y degrees

Angle 3 =?

First, we determine the measure of the third angle.

Since the sum of angles on a straight line equals 180 degrees:

Angle 3 + 114 = 180

Angle 3 = 180 - 114

Angle 3 = 66

Now, the total sum of the interior angles of a triangle equals 180 degrees.

Hence:

Angle 1 + Angle 2 + Angle 3 = 180

y + y + 66 = 180

Collect and add like terms:

2y + 66 = 180

2y = 180 - 66

2y = 114

Divide both sides by 2:

y = 114/2

y = 57°

Therefore, y has a value of 57.

Option A) 57° is the correct answer.

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Answer:

x = 76

Step-by-step explanation:

PQ is a tangent to the circle at Q , thus the angle between the tangent and the radius is 90°

The sum of the 3 angles in the triangle = 180°, thus

x = 180° - (90 + 14)° = 180 - 104 = 76

Answer:

[tex] \boxed{f = -6} [/tex]

Step-by-step explanation:

[tex] = > - 7f - 9 = 9 - 4f \\ \\ = > - 7f + 4f - 9 = 9 \\ \\ = > - 3f = 9 + 9 \\ \\ = > - 3f = 18 \\ \\ = > 3f = - 18 \\ \\ = > f = - \frac{18}{3} \\ \\ = > f = - 6[/tex]

If two chords in a circle are congruent, then they are the same distance from the center of the circle. Then the correct option is B.

It is the close curve of an equidistant point drawn from the center. The radius of a circle is the distance between the center and the circumference.

The central angle is double the angle at the periphery that was subtended by the same chords.

Both the extreme points of the chords are connected to the circle. Then the two triangles are formed whose two sides are the radius of the circle that is congruent to each other. Then the triangle will be an isosceles triangle.

And the chord length is also congruent. Then the triangles are congruent to each other by SSS postulates.

If two chords in a circle are congruent, then they are the same distance from the center of the circle. Then the correct option is B.

More about the circle link is given below.

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Answer:

opinion

Step-by-step explanation:

2 different sets of data can have the same mean:

for example

4, 5, 6 ---> has a mean of 5

2,6,7 ---> also has a mean of 5

hence it is NOT a fact that if the means are the same, that it must be the same data set

Answer:

option c

Step-by-step explanation:

There is no mistake, she did it right

Answer: It’s A y > x^2-4

Y < x^2+3

Step-by-step explanation:

Answer:

Quadrant 3

Step-by-step explanation:

Answer:

Quadrant 3

Step-by-step explanation:

All negatives all fall under 3

Answer:

[tex]x = -13\frac{1}{2}[/tex]

Step-by-step explanation:

Eight less than a third of a number is the sum of that number and one.

Let the number be x.

That is:

[tex]\frac{1}{3}x - 8 = x + 1\\ \\=> x - \frac{1}{3}x = -8 - 1 \\\\\frac{2}{3}x = -9\\\\x = -9 * \frac{3}{2}\\ \\x = \frac{-27}{2}[/tex]

[tex]x = -13\frac{1}{2}[/tex]

Answer:

87.5%

Step-by-step explanation:

Answer:

7/8 or 87.5%

Step-by-step explanation:

Total= 72

Correct= 63

Fraction of correct marks= 63/72= 7*9/8*9= 7/8 or 87.5%

Answer:

Also on the circle

Step-by-step explanation:

solved it graphically with desmos.

please press brainliest ((gives you 10 points back btw)

Answer:

We need a non-included side of one triangle

Step-by-step explanation:

By means of the AAS postulate.

The Angle-Angle-Side postulate (AAS) tells us that if two angles and a non-included side of one triangle are congruent to two angles and the corresponding non-included side of another triangle, then the two triangles are congruent.

Answer:1,  2,  5

Step-by-step explanation:

just did it on edge

umm what the rest of the question

Answer:

no he weghed 3 pound

Step-by-step explanation:

Answer:

y=-7x+22

Step-by-step explanation:

Answer:y=(x-6)^2-4

Step-by-step explanation:

Answer:

f(x) = (x + 3)² - 13

Step-by-step explanation:

The equation of a parabola in vertex form is

f(x) = a(x - h)² + k

Given

f(x) = x² + 6x - 4

Using the method of completing the square

add/subtract ( half the coefficient of the x- term )² to x² + 6x

f(x) = x² + 2(3)x + 9 - 9 - 4

f(x) = (x + 3)² - 13 ← in vertex form

Answer:

(-1, -1/2)

Step-by-step explanation:

To find the x coordinate of the midpoint, add the x coordinates and divide by 2

( -11+9)/2 = -2/2 = -1

To find the y coordinate of the midpoint, add the y coordinates and divide by 2

(0+-1)/2 = -1/2

(-1, -1/2)

Answer:

[tex] 5.99 \times {10}^{ - 9} \\ \\ 1.80 \times {10}^{9} \\ \\ 3.42 \times {10}^{ - 9} [/tex]

Step-by-step explanation:

Following numbers are written in scientific notations.

[tex]5.99 \times {10}^{ - 9} \\ \\ 1.80 \times {10}^{9} \\ \\ 3.42 \times {10}^{ - 9} [/tex]

Answer:

[tex] \boxed{y = 3} [/tex]

Step-by-step explanation:

[tex] = > \frac{5 - 7y}{2 + 4y} = - \frac{8}{7} \\ \\ = > 7(5 - 7y) = - 8(2 + 4y) \\ \\ = > (7 \times 5) - (7 \times 7y) = ( - 8 \times 2) + ( - 8 \times 4y) \\ \\ = > 35 - 49y = - 16 - 32y \\ \\ = > 35 - 49y + 32y = - 16 \\ \\ = > 35 - 17y = - 16 \\ \\ = - 17y = - 16 - 35 \\ \\ = > \cancel{- }17y = \cancel{- } 51 \\ \\ = > 17y = 51 \\ \\ = > y = \frac{51}{17} \\ \\ = > y = 3[/tex]

Answer:

y = -6x - 6

Step-by-step explanation:

First, subtract 12x from both sides:

12x + 2y = -12

-12x            -12x

-----------------------

2y = -12x - 12

Divide both sides by 2:

y = -6x - 6

Answer:

y=−6x−6 because thats what the guy on top of me said

Step-by-step explanation:

Answer:

2 x^3 - 2 x^2 - 19 x + 21

Step-by-step explanation:

Expand the following:

(2 x^2 + 4 x - 7) (x - 3)

Hint: | Multiply out (x - 3) (2 x^2 + 4 x - 7).

| | 2 x^2 | + | 4 x | - | 7

| | | | x | - | 3

| | -6 x^2 | - | 12 x | + | 21

2 x^3 | + | 4 x^2 | - | 7 x | + | 0

2 x^3 | - | 2 x^2 | - | 19 x | + | 21:

Answer: 2 x^3 - 2 x^2 - 19 x + 21

Answer:

ln(20×5)=InX^2

In100=InX^2

X^2=100

X=10

The solution of the given expression will be x = 10

Expression in maths is defined as the collection of the numbers variables and functions by using signs like addition, subtraction, multiplication and division.

The solution of the given equation is:-

ln(  20 × 5)   =   InX²

In100   =    InX²

X²   =    100

X    =    10

Therefore the solution of the given expression will be x = 10

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Answer:

6x-21

Step-by-step explanation:

Answer:

59.5cm^2

Step-by-step explanation:

Area of a trapezoid is calculated by dividing the sum of parallel sides and that's multiplied by height

(12.5 + 4.5) ÷ 2 × 7 = 59.5cm^2