Please help I need this before 8:00

Answer:

a = 3

Step-by-step explanation:

Here you can use the cross multiplication strategy or whatever it's called. That's where you multiply the diagonals together. Its kinda long to explain, but you can google it for details.

In either case, you get the following equation:

8(2a-1) = 4(a+7)

Open the parenthesis

16a - 8 = 4a + 28

Subtract 4a from both sides

12a - 8 = 28

Add 8 to both sides

12a = 36

Divide both sides by 12

a = 3

Sorry for weird formatting I'm on an ipad.

Answer:

Your answer is: A = 3

Solve for  a  by cross multiplying.

Step-by-step explanation:

Hope this helped : )

answer is 45 ( x = 45 ) yes or no

Answer:

x = 1

Step-by-step explanation:

...................

Answer:

1

Step-by-step explanation:

Step 1:

3x + 11 = 5x + 9     Sum of a line

Step 2:

11 = 2x + 9      Subtract 3x on both sides

Step 3:

2 = 2x      Subtract 9 on both sides

Answer:

x = 1        Divide

Hope This Helps :)

Step-by-step explanation:

✔️✔️✔️✔️✔️✔️✔️✔️✔️✔️✔️✔️✔️

Answer:

Step-by-step explanation:

Comment

This uses the cosine Law for line length.

Formula

a^2 = b^2 + c^2 - 2*b*c*sin(A)

Givens

a  = 5

b = 7

c = 10

Solution

5^2 = 7^2 + 10^2 - 2*7*10*cos(A)

25 = 49 + 100 - 140*cos(A)                  Combine the right side

25 = 149 - 140 * cos(A)                         Subtract 149 from both sides

25 - 149 = - 140*cos(A)                    

-124 = -140 * cos(A)                               Divide both sides by -140

-124/-140 = cos(A)

Cos(A) = 0.8857                                   Take the inverse Cos of both sides

A = cos-1(0.8857)

Answer

A = 27.66 degrees

Step-by-step explanation:

The Rotation of a point through 180°, about the origin when a point M (h, k) is rotated about the origin O through 180° in anticlockwise or clockwise direction, it takes the new position M' (-h, -k). ...I think.. Hope it is right...;3

Answer:

180 Degree Rotation

When rotating a point 180 degrees counterclockwise about the origin our point A(x,y) becomes A'(-x,-y).

Step-by-step explanation:

Answer: 11 cm

Step-by-step explanation:

Answer:

- [tex]\frac{1}{4}[/tex]

Step-by-step explanation:

The equation of a line in slope- intercept form is

y = mx + c ( m is the slope and c the y- intercept )

Given

4x - y = 9 ( subtract 4x from both sides )

- y = - 4x + 9 ( multiply through by - 1 )

y = 4x - 9 ← in slope- intercept form

with slope m = 4

Given a line with slope m then the slope of a line perpendicular to it is

[tex]m_{perpendicular}[/tex] = - [tex]\frac{1}{m}[/tex] = - [tex]\frac{1}{4}[/tex]

Answer:

y = 3

Step-by-step explanation:

I hope this helps!

Answer:

y = 3

Step-by-step explanation:

6/2 equals 3, and since 2 times 3 equals 6, y is the answer for this problem.

it's C since it also has 4 elements

Answer:

2.5 minutes per question

Step-by-step explanation:

90 mins/ 36 questions equals 2.5 mins per question

Answer:

A 45degrees

Step-by-step explanation:

Answer:

scale factor = 4

Step-by-step explanation:

The scale factor is the ratio of OA' to OA , that is

scale factor = [tex]\frac{OA'}{OA}[/tex] = [tex]\frac{3+9}{3}[/tex] = [tex]\frac{12}{3}[/tex] = 4

Answer:

x = 45

Step-by-step explanation:

15 = [tex]\frac{1}{3}[/tex] x ( multiply both sides by 3 to clear the fraction )

45 = x

Answer:

x = 45

Step-by-step explanation:

15 =  x

15(3)=x

45=x or x=45

Answer:

41.5

23.5

Step-by-step explanation:

Let's start by calling the two numbers we are looking for x and y.

The sum of x and y is 65. In other words, x plus y equals 65 and can be written as equation A:

x + y = 65

The difference between x and y is -18. In other words, x minus y equals -18 and can be written as equation B:

x - y = -18

Now solve equation B for x to get the revised equation B:

x = -18 + y

Then substitute x in equation A from the revised equation B and then solve for y:

x + y = 65

-18+y+y=65

-18 + 2y = 65

2y = 83

y = 41.5

Now we know y is 41.5. Which means that we can substitute y for 41.5 in equation A and solve for x:

x + y = 65

x + 41.5= 65

X = 23.5

DIfference : 23.5 - 41.5 = 18

Sum: 41.5 +23.5 = 65

Hence, The two number are 23.5 and 41.5

[RevyBreeze]

Answer: 16

Step-by-step explanation:

Answer:

x = -2i, 2i

Step-by-step explanation:

x² + 4 = 0

    -4     -4

x² = -4

x = 2i, -2i

I hope this helps!

Answer:

(-5,1)

Step-by-step explanation:

y= 13.5+2.5x

-13.5 -13.5

-13.5= 2.5x

x= -5.4

In the top row, first column the answer is D) Ray RQ and Ray RS. Opposite rays point in complete opposite directions. When joined, opposite rays form a line.

-----------

In the top row, second column, the answer is B) S, T, U. We're naming three points that all fall on the same line.

===============================================

In the bottom row, first column, the answer is A) Point. An example of this is the diagram in the bottom right corner. The lines WV and XZ intersect at the point Y.

-----------

Finally, in the bottom row, second column, the answer is D) Ray YW and Ray YV. Like with the first problem, we're listing two rays that when joined, form a straight line. They point in complete opposite directions. The order matters when it comes to naming a ray. The first letter tells us the endpoint and the second letter tells us where the ray points and goes on forever.

Answer: See graph and proof below

Step-by-step explanation:

Under the reflection about the line x=-2

[tex]\begin{aligned}&A(-4,4) \longrightarrow A^{\prime}(0,4) \\&B(-3,3) \longrightarrow B^{\prime}(-1,3) \\&C(-3,2) \longrightarrow C^{\prime}(-1,2) \\&D(-5,1) \longrightarrow D^{\prime}(1,1) \\&E(-5,3) \longrightarrow E^{\prime}(1,3) \\&m < A=m < A^{\prime} \text { is true. }\end{aligned}[/tex]

Answer:

26

Step-by-step explanation:

If n means 9 then 26 is the correct answer because 9hr. - 1hr. = 8hr. x 3 = 24 rings + 2 rings = 26.

Well they have to  be perpendicual because they cross and parallel means that they are like lines on lines paper, they do not cross, they just keep going. Hope this helps :)

Answer:

6

Step-by-step explanation:

i tried 7 and it didn't work

so i used a hint - it's 6!

6 pies are more in 60 to 89 cherries than 90 to 119 cherries, a bar graph is a graphical depiction of information, amounts, or numbers using bars or strips.

They are employed to contrast and compare various data kinds, frequencies, or other measurements of several categories of data.

here, we have,

The calculation of the bar graph in the given question.

For 60 - 89 cherries there are 10 pies

For 90 -119 cherries there are 4 pies

10 -4 = 6  pies

The image for the graph is attached below.

When displaying sections of data, bar charts should be used. As long as there aren't too many categories to compare, vertical bar charts can be useful for comparing several categories or discrete data, such as age groups, classes, schools, etc. They are quite helpful for time series data as well.

Therefore, there are 6 more pies in the 60 -89 cherries category than in the 90-119 category.

Learn more about bar graphs, here:

brainly.com/question/13028521

#SPJ3

Answer:

Skewed left

Step-by-step explanation:

The outlier extends the curve making it skewed left is what i think

Answer:

12

Step-by-step explanation:

Perimeter is using addition and if its a square, all of the sides are the same.

If one side = 3 cm, then 3cm + 3cm + 3cm + 3cm=12 cm

Answer:

12

Step-by-step explanation:

A square with 3cm long side

Area = 2 sides multiplied

Perimeter = All sides added

3 + 3 + 3 + 3 = 12cm

or

3 × 4 = 12cm

Answer:

i'm pretty sure it is (1,-3) and (2,1)

3 equal angles

so the triangle is equilateral => 3 equal sides

4x-10 = 3x+2

x = 12

or

4x-10 = 5x-22

-x = -12

x = 12

or

5x - 22 = 3x + 2

2x = 24

x = 12

x = 12

Answer:

The value of x = 12

Step-by-step explanation:

This is an equilateral triangle and the sides of an equilateral triangle are equal .

By putting the two sides of the triangle equal , we can find out the value of x

=> 4x - 10 = 3x +2

=> 4x - 3x = 2 + 10

=> x = 12

Answer:

=> x = 2.4

Step-by-step explanation:

By using PGT

=> (5+x)² = 7²+x²

=> 5² +x² +2(5)(x) = 49+x²

=> 25 + x² + 10x = 49 +x²

=> 10x = 49-25

=> 10x = 24

=> x = 24/10

=> x = 2.4

This question is Incomplete

Complete Question

Colleen compared the ratios 3:8 and 1/2.

Her work is shown below.

Write the ratios as fractions: 3/8 and 1/8 Compare the numerators: 3 > 1 Write the correct statement: 3/8 > 1/2

Where did Colleen make her first mistake?

A. The common denominator should be 4 rather than 8

B. The numerators are compared incorrectly.

C. The fraction 1/2 should have been rewritten as 6/8

D. The fraction 1/2 should have been rewritten as 4/8.

Answer:

D. The fraction 1/2 should have been rewritten as 4/8.

Step-by-step explanation:

Colleen compared the ratios 3:8 and 1/2.

Step 1

Write the ratios as fractions: 3/8 and 1/2

Step 2

Compare the numerators: 3 > 1

Step 3

Compare the denominators 8 >2

Write the correct statement:

3/8 > 4/8

Therefore, D. The fraction 1/2 should have been rewritten as 4/8.