15 points to Answer this!! Really need help this Important!!

Answer:

D

Step-by-step explanation:

graphing substitution and elimination

Answer:

sina

Step-by-step explanation:

Using the cofunction identity

cos(90 - x) = sinx , then

cos(120 - (30 + a) )

= cos(120 - 30 - a)

= cos(90 - a)

= sina

An expression is defined as a set of numbers, variables, and mathematical operations. Using a cosine function identity cos(120° − (30° + a)) can be written as sin a.

In mathematics, an expression is defined as a set of numbers, variables, and mathematical operations formed according to rules dependent on the context.

The given cosine expression can be rewritten as,

cos(120° − (30° + a))

Opening the bracket, to simplify the angle,

= cos(120° − 30° − a)

= cos(90° − a)

Since the cosine and sine angles are complementary to each other, therefore, cos(90° − x) = sin(x), thus, we can write the expression as,

= sin a

Learn more about Expression:

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Answer:

6 cupcakes per box

Step-by-step explanation:

divide 18 by 3

Answer:

4/25

Step-by-step explanation:

Answer:

The ladder touches the wall at 24 feet from the ground.

Step-by-step explanation:

The wall of the building, the ground, and the ladder form a right triangle, whose longer side is the length of the ladder.

In any right triangle, we can apply Pythagora's theorem to find any missing side length.

The ladder is 26 feet in length, the distance from the bottom of the ladder and the building is 10 feet. Calling H to the distance above the ground where the ladder touches the wall, then:

[tex]26^2=10^2+H^2[/tex]

Calculating:

[tex]676=100+H^2[/tex]

Solving:

[tex]H^2=676-100[/tex]

[tex]H^2=576[/tex]

[tex]H=\sqrt{576}[/tex]

H=24 feet

The ladder touches the wall at 24 feet from the ground.

Answer:

The distance from A(-1/4, 5) to the line -x + 2·y = 14 is approximately 1.7 units

Step-by-step explanation:

The shortest distance from a point to a line is the perpendicular from the line to the point

The equation of the given line is -x + 2·y = 14, which can be written in slope and intercept form as follows;

-x + 2·y = 14

2·y = 14 + x

y = 14/2 + x/2 = x/2 + 7

y = x/2 + 7

The slope, m₁ = 1/2 and the y-intercept = 7

Therefore, the slope, m₂, of the perpendicular line to the line -x + 2·y = 14 which was rewritten as y = x/2 + 7 is m₂ = -1/m₁ = -1/(1/2) = -2

Therefore, we have that the slope of the line from A(-1/4, 5) to the line -x + 2·y = 14, is -2

The equation of the line is therefore;

y - 5 = -2(x - (-1/4))

y - 5 = -2·x - 1/2

y = -2·x - 1/2 + 5 = -2·x + 9/2

y = -2·x + 9/2

The coordinates of the point on the line -x + 2·y = 14 (y = x/2 + 7) that coincides with the perpendicular from the point A(-1/4, 5) is therefore given as follows;

-2·x + 9/2 = x/2 + 7

9/2 - 7= x/2 + 2·x

-2.5 = 2.5·x

x = -2.5/2.5 = -1

x = -1

y = x/2 + 7 = -1/2 + 7 = 6.5

y = 6.5

The coordinates of the point on the line -x + 2·y = 14 (y = x/2 + 7) that coincides with the perpendicular from the point A(-1/4, 5) is (-1, 6.5)

The distance from A(-1/4, 5) to B(-1, 6.5), is given as follows;

[tex]l = \sqrt{\left (y_{2}-y_{1} \right )^{2}+\left (x_{2}-x_{1} \right )^{2}}[/tex]

Where;

(x₁, y₁) = (-1/4, 5), and (x₂, y₂) = B(-1, 6.5)

Plugging in the values, we have;

[tex]l_{AB} = \sqrt{\left (6.5-5 \right )^{2}+\left ((-1)-(-1/4) \right )^{2}} = \sqrt{\left (-0.75 \right )^{2}+\left (1.5 \right )^{2}} = \sqrt{\dfrac{45}{16} } = \dfrac{3}{4} \cdot \sqrt{5}[/tex]

[tex]l_{AB} = \dfrac{3}{4} \cdot \sqrt{5} \approx 1.677[/tex]

Therefore, the distance from A(-1/4, 5) to the line -x + 2·y = 14 ≈ 1.7 units, rounding to the nearest tenth.

Answer:

Step-by-step explanation: no work shown?

Answer:

Er... um... huh?

Step-by-step explanation:

WHAT IS THIS A CULT OR SUMTHIN'

Given:

The number is [tex]\sqrt{125}[/tex].

To find:

The estimate value of given number.

Solution:

We have,

[tex]\sqrt{125}=\sqrt{5\times 5\times 5}[/tex]

It can be written as

[tex]\sqrt{125}=5\sqrt{5}[/tex]

We know that, [tex]\sqrt{5}\approx 2.236[/tex]. So,

[tex]\sqrt{125}=5(2.236)[/tex]

[tex]\sqrt{125}=11.18[/tex]

Approx the value to the nearest integer.

[tex]\sqrt{125}\approx 11[/tex]

Therefore, the required integer is 11.

Answer:

aswer is something

Step-by-step explanation:

Answer: Ur mom

Step-by-step explanation:

Answer:

274 1/3 long sleeve shirts

Step-by-step explanation:

Deal Finder is sorting its production supply of long-sleeve shirts. They have 1,089 long-sleeve shirts. The first 266 are donated

Hence,

1089 - 266

= 823 long sleeve shirts are left

The rest are split up to be shipped to 3 stores.

This is calculated as:

= 823 long sleeve shirts /3 stores

= 274 1/3 shirts

What fraction represents how many long-sleeve shirts each store will receive?

Each store will receive : 274 1/3 long sleeve shirts

Answer:

Okay...

Step-by-step explanation:

Just divide as a fraction for if you finish the question.

Answer:

third option

Step-by-step explanation:

[tex]( x + y = 8 ) + ( 2x^{2} - y = -5 )\\\\(x + y + 2x^{2} - y ) = 8 + (-5)\\2x^{2} + x = 3[/tex]

Answer:

2x(5x + 3)

Step-by-step explanation:

Factor out common factors. Note that both terms have x inside it. Therefore, you will factor out one x from each term.

Note the factors of both 10 & 6:

10: 1 , 2 , 5, 10

6: 1 , 2 , 3, 6

Note that the greatest factor shared is 2. Divide 2 and x out from both terms:

(10x² + 6x)/2x = 5x + 3

2x(5x + 3) is your answer.

~

Answer:

10$

Step-by-step explanation:

just because

Answer:

$10

Step-by-step explanation:

What we know: you want to pay for 5 order of chicken nuggets.

Each order is $2

So...

5 orders of nuggies × $2

Total: $10 for nuggies

Answer:

D=10

Step-by-step explanation:

38=3d -(-8)

38=3d+8

38-8=3d+(8-8)

30=3d

30/3=3d/3

10=d

=3d+

Answer:

There's no proportional relationship between number of laps and minutes.

Step-by-step explanation:

The graph given above is a straight line graph, however, it does not cut across the point of origin (0, 0). As a result of this, it would be difficult to get a constant of proportionality, as you'd likely get different constant of proportionality between different points on the line. Thus, the ratio of y and x for each set of points may vary.

So therefore, the relationship between the x and y cannot be proportional.

We can conclude that the graph does not represent a proportional relationship between number of laps and minutes.

Answer:

79 = 13+15+24+ missing side. 79 = 52 + missing side

Answer:

the answer would be 49 on the other side

Not mathematics, but if I could be anything in the world, I'd be a bird.

I would be a pine cone cause it was an option                                                                                          

Answer:

-72

Step-by-step explanation:

-32+(2-6)(10)

-32+(-4)(10)

-32+(-40)

-72

Answer:

its -49

Step-by-step explanation:

i got it right on edge 2021

Answer:

The answer is below

Step-by-step explanation:

A linear equation is represented by the equation y = mx + b, where m is the rate of change, b is the value of y at x = 0, y is a dependent variable and x is an independent variable.

a) Given that number of chirps per minute, C is dependent on the temperature, T, when T = 45 degrees, C = 0, this can be represented as (45, 0).

Also at 75 degrees, C = 126 it can be represented as (75, 126).

Using (45, 0) and (75, 126), we can determine the equation of the line from:

[tex]C-C_1=\frac{C_2-C_1}{T_2-T_1}(T-T_1)\\ \\C-0=\frac{126-0}{75-45}(T-45)\\ \\C=4.2(T-45)\\\\C=4.2T-189\\\\[/tex]

b) At t = 90°:

C = 4.2(90) - 189

C = 189 chirps per min

a. The expression of the number of chirps should be C =  4.2T - 189

b. The number of chirps per minute should be 189 chirps per min.

Since The crickets do not chirp at all at 45 degrees and at 75 degrees they chirp about 126 times per minute.

So, here we used (45, 0) and (75, 126), we can measure the equation of the line from

[tex]C- C_1 = \frac{C_2-C_1}{T_2-T_1} (T_2 - T_1)\\\\C- 0 = \frac{126-0}{75-45} (T - 45)\\\\[/tex]

C = 4.2(T - 45)

C = 4.2T - 189

b. When T = 90 degrees

So,

C = 4.2(90) - 189

= 189 chirps

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Answer:

3

Step-by-step explanation:

-33+9=-24

-24+9=-15

-15+9=-6

-6+9=3

Answer:

3, 12, 21

Step-by-step explanation:

-33+9=-24

-24+9=-15

-15+9=-6

-6+9=3

3+9=12

12+9=21

Answer:

-2

Step-by-step explanation:

Answer:

Step-by-step explanationNote:

1

ml

=

1

cc

If the water rose

7

ml

−

2

ml

=

5

ml

then the stone had a volume of

5

ml

or

5

cc

With a mass of

25

g

it must have a density of

XXX

25

g

5

cc

=

5

g/cc

This question was not written properly

Complete Question

In an aquarium, 2/5 of the fish are surgeonfish. Of these, 3/4 are yellow tangs. In simplest form, what fraction of all fish in the aquarium are yellow tangs?

Answer:

The fraction of all fish in the aquarium that are yellow tangs = 3/10.

Step-by-step explanation:

The fraction of all fish in the aquarium that are yellow tangs=

3/4 Of 2/5

= 3/4 × 2/5

= 6/20

In its simplest form = 3/10

Therefore, the fraction of all fish in the aquarium tha are yellow tangs = 3/10

Answer:

3 million or 3 x 10^6

Step-by-step explanation:

You would round this up to three million because the digit before it is 5 or larger. Then, using the three million number, you move the decimal over 6 places to get a digit less than ten so it would become 3 times 10 to the power of 6

Answer:

The image of the point (0, -6) under the same translation is (-6, -12)

Step-by-step explanation:

Let us revise the rules of translation

∵ The coordinate of point P are (3, 8)

∵ The coordinates of its image P' are (-3, 2)

→ The x-coordinate is changed from 3 to -3, that means the point

   translated to the left by h units

∵ h = -3 - 3

∴ h = -6

→ The y-coordinate is changed from 8 to 2, that means the point

   translated down by k units

∵ k = 2 - 8

∴ k = -6

→ By using the rule above

∴ The rule of translation is (x, y) → (x - 6, y - 6)

∵ The coordinates of the point are (0, -6)

∴ The coordinates of its image are (0 - 6, -6 - 6)

∴ The coordinates of its image are (-6, -12)

Answer:

Slope W is 1/4, Slope Z is -4, Slope X is 1/4, Slope Y is -4

Step-by-step explanation: just did on edg and got it right