please help I'm actually crying! Find A and B if the graph of Ax + By = 7 passes through (2,1) and is parallel to the graph of 2x - 7y = 3.

Answer:

a

Step-by-step explanation:

a and d and b and c share the same symbol that represents their angle. therefore, they are corresponding.

The expression that is equivalent to 2cos²(x/2) - cos(x) is 1.

These are the equation that contains trigonometric operators such as sin, cos.. etc.. In algebraic operations.

Here,
We can use the double angle identity for cosine, which states that:

cos(2θ) = 2cos²(θ) - 1

To simplify given expression expression by putting cos(x) = 2cos²(x/2) - 1 as follows:

= 2cos²(x/2) - cos(x)

= 2cos²(x/2) - 2cos²(x/2) + 1  (using the identity cos(2θ) = 2cos²(θ) - 1)

= 1

Therefore, the expression that is equivalent to 2cos²(x/2) - cos(x) is 1.

Learn more about trigonometry equations here:

brainly.com/question/22624805

#SPJ1

Complete Question

The horizontal axis in the sampling distribution of [tex]\^p[/tex] represents all possible sample proportions from a simple random sample of size n.

a. What percent of sample proportions results in a 90​% confidence interval that includes the population​ proportion?

b. What percent of sample proportions results in a 90​% confidence interval that does not include the population​ proportion?

Answer:

a

 90% of  all possible sample proportions

b

 (100% - 90% = 10% ) of  all possible sample proportions

Step-by-step explanation:

Generally given from the question that the horizontal axis of a represent all possible sample proportion then then the percent of the sample proportion that result in 90%  interval that includes the population​ proportion is   90% of  all possible sample proportions

Generally given from the question that the horizontal axis of a represent all possible sample proportion  then the percent of the sample proportion that result in 90%  interval that does not include the population​ proportion is   (100% - 90% = 10% ) of  all possible sample proportions

Answer:

it is really just 12-10 because 10 is negative think of it as you are taking away ten from the original 12 you have so the answer is 2

Answer:

2

Step-by-step explanation:

Add 12 to -10

10+-10=0+2=2

Answer:

∠EGA = 123°

∠EHD = 57°

Step-by-step explanation:

Determine the measure of ∠EGA:

Since ∠EGB and ∠EGA make up the angle of a straight line (180°):

∠EGB+∠EGA = 180

57+∠EGA = 180 (given that ∠EGB = 57°)

∠EGA = 123°

Determine the measure of ∠EHD:

∠EHD = ∠EGB (corresponding angles of parallel lines are equal)

∠EHD = 57° (given that ∠EGB = 57°)

Hope this helps :)

Answer:

2 2/9

Hope this helps!

Answer:

25,600 feet in difference

Step-by-step explanation:

If the jet is 25,000 feet above sea level then dives 600feet below sea level that will be 25,600 feet in difference.

25,000 - - 600

25,000 + 600

25,600

Answer:

you can plug in x to find y then use them as coordinates to find your answer.

Step-by-step explanation:

ex:

y=((1)-4)^2-3

y= (-3)^2-3

y=9-3

y=6

so then check to see if (1,6) is a point in that line.

Answer:

so you will need the slope is 1/2 and the y intercept is -4

Step-by-step explanation:

just find the y coordinate and find where the line on the graph is located to find the intercept then the slope is just where and how much the graph moves to for example if the graph goes right 2 times it goes up once so that means that it is true

Answer:

Step-by-step explanation:

Part A: 5/26

Part B: 5/26+ 1/2 which is 18/26 or 9/13

Part C: 5/26 +21/25. 'without replacing' means there is one less option in the bag. So denominator becomes 26-1=25. Numerator is 21 because there are a total of 21 consonants in the alphabet. Since we removed a vowel and not a consonant, it will remain 21.

Answer: rotation can be expressed as the composition of two reflections. A composition of reflections over two parallel lines is equivalent to a translation. Example: Given a || b, and pre-image ΔABC, where parallel lines are vertical. The composition of reflections over two intersecting lines is equivalent to a rotation. A composition of transformations is a combination of two or more transformations, each performed on the previous image. A composition of reflections over parallel lines has the same effect as a translation (twice the distance between the parallel lines). i hope this helps.

Step-by-step explanation:

Answer:

x > 15

General Formulas and Concepts:

Pre-Algebra

Step-by-step explanation:

Step 1: Define inequality

5x - 7 > 4x + 8

Step 2: Solve for x

Here we see that any value x that is greater than 15 would work as a solution to this inequality.

Answer:

i sure for the bottom one is 3

Answer:

The answer is 1.

Step-by-step explanation:

=36 - 7 (8+6-9)

=36-56-42+63

=-20-42=-62+63

=1

Answer:

36-7(8+6-9)

29(5)

145

Answer:

a. 37.5

b. 25

Step-by-step explanation:

a. Rate of change the first 4 seconds can be calculated using the points (0, 0) and (4, 150):

Rate of change = [tex] \frac{y_2 - y_1}{x_2 - x_1} = \frac{150 - 0}{4 - 0} = \frac{150}{4} = 37.5 [/tex]

b. Rate of change between 8 seconds and 12 seconds using the points (8, 150) and (12, 250):

Rate of change = [tex] \frac{y_2 - y_1}{x_2 - x_1} = \frac{250 - 150}{12 - 8} = \frac{100}{4} = 25 [/tex]

Answer:

Ms. Montesinos has 5 fish in her tank

Step-by-step explanation:

a) Let y = the amount of fish Ms. Montesinos

b) 3y-2=13

c)

3y-2+=13+2

3y/3=15/3

y=5

The square root of 12 is approximately 3.4641.

The square root of 12 is an irrational number, meaning it cannot be expressed as a fraction or terminating decimal. However, we can approximate its value.

To approximate the square root of 12, we can use a calculator or perform an estimation. The square root of 12 is approximately 3.4641.

When we multiply 3.4641 by itself (3.4641 * 3.4641), we get a value very close to 12, but not exactly 12 due to the irrational nature of the square root.

The square root of 12 represents a number that, when multiplied by itself, equals 12. It is a non-repeating, non-terminating decimal that goes on infinitely. The approximation 3.4641 is commonly used to represent the square root of 12 in practical calculations.

Learn more about square root here

https://brainly.com/question/11952036

#SPJ6

English translation of question is below

What is the square root of 12?

Answer:

25/9=2.77777777778

Step-by-step explanation:

Step-by-step explanation:

20 a + I 5 b + 3a - 3b

23 a + 12b

Answer:

03:24 PM

Step-by-step explanation:

Given

[tex]Start\ Time = 3:00PM[/tex]

WMTH = Every 12 minutes

WMSU = Every 8 minutes

Required

Determine when they both play the song

To do this, we simply solve for the LCM of 8 and 12

List the factors of 8 and 12

[tex]8 : 8, 16, 24...[/tex]

[tex]12: 12, 24, 36...[/tex]

From the above, the least common multiple is 24

This means that the song will be played on both stations 24 minutes after 3:00PM

In other words, 03:24 PM

Answer:

She can fill 9 containers

Step-by-step explanation:

you do 6 3/4 dived by 3/4 and you get 9

Answer:

THIS IS WORTH $1,000,000!!! DEFINITELY 100/10 LIKE FOR SURE!!!! :)))))

Answer:

I LOVE IT 10000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000/10 beautiful

Answer:

20 degrees

Step-by-step explanation:

Y is 90 degrees.

lets find the measure of the other angle, 180-110 is 70.

using this info let’s find X.

180-(70+90)

180-160

20

Answer:

15k+5

Step-by-step explanation:

11k-3+4k+8

=(11k+4k) (-3+8)

=15k+5

Answer:

5(3k+1)

Step-by-step explanation:

11k-3+4k+8 collect like terms calculate

15k+5 factor the expression

5(3k+1) or 15k+5

Answer:

slope = 5/3

Step-by-step explanation:

(in case you need it in intercept form)

y = 5/3 + 1

Answer:

88 birdhouses

6 new boxes

226 postcards

Answer:

1. 88

2. 6

that's all, and when you do problems like this later, don't forget the order of operations!

Answer:

55 mph

Step-by-step explanation:

The family would have to drive an average of 55 mph. You find this by dividing 220 miles total by the 4 hour time allotment. ;)