which of the following graphs could describe the system of equations
a) blue
b)purple
c)green
d)pink

Answer:

14,700 butterflies

Step-by-step explanation:

Given the following data;

Time, x = 7 years

f(x) = 2,000(1.05)x

To find the population;

A population can be defined as the total number of living organisms living together in a particular place and sharing certain characteristics in common.

Substituting into the equation, we have;

f(7) = 2,000(1.05) * 7

f(7) = 2,100 * 7

f(7) = 14,700 butterflies

Answer:

15 percent

Step-by-step explanation:

Based on the length of the fish and the standard deviation above the mean, the percentage of fish that will have a length of more than 21.11 inches is 15.9%.

Using the z table, we find that the z score probability for a length less than 21.11 inches when there is one standard deviation above the mean is 0.841.

The percentage of fish that are greater than 21.11 inches will therefore be:

= 1 - probability that fish is shorter than 21.11 inches

= 1 - 0.841

= 0.159

= 15.9%

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Answer:

  x = 20

Step-by-step explanation:

Corresponding sides are proportional:

  x/15 = 24/18

  x = 15(24/18) = 15(4/3)

  x = 20

Answer:

According to the property of corresponding sides

x1/x2 = y1/y2

x/15 = 24/18

x/15 = 4/3

x = 4 × 15/3

x = 4 × 5

x = 20

[tex] \\ [/tex]

Answer:

x=65

Step-by-step explanation:

that is all. It is isoceles triangle so if p is 65, l is also 65

Answer:

65 degrees

Step-by-step explanation:

The two sides of the angle is equal which means it is an isosceles triangle, the value will be 65 degrees

Answer:

area of rectangle = 110 cm^2

Step-by-step explanation:

here's your solution

=> length of rectangle = 35 cm. [ given ]

=> width of rectangle = 20 cm. [ given ]

=> we need to find area ,

=> area of rectangle = 2(length + width)

=> area of rectangle = 2(35 + 20)

=> area of rectangle = 2*55 =

=> area of rectangle = 110 cm^2

[tex] \: hope \: it \: helps..[/tex]

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Answer:

  71°

Step-by-step explanation:

Opposite angles of an inscribed quadrilateral are supplementary.

  ∠H = 180° -109° = 71°

_____

Additional comment

The above rule comes from the more general rule that the measure of an inscribed angle is half the measure of the arc it intercepts. Here, inscribed angle J intercepts arc GHI, so that arc has measure 2×109°. Then the measure of short arc GI is 360° -2×109°, and inscribed angle H is half that:

  ∠H = (1/2)(360° -2×109°)

  ∠H = 180° -109° = 71°

Answer:

B

Step-by-step explanation:

To find the answer, translate each point and then use the process of elimination.

For the first point, the coordinates are (-4, -2). The -4 is x and the -2 is y. Translations up and down relate to the y value, while translations left and right relate to x. To translate up 4 units, add 4 to the y value of the coordinate. -2 + 4 is 2, so the y coordinate of the first point will be 2. That eliminated A and D.

For the second point, translate up 4 units (-5 + 4) and you get -1. So the y value of the second point will be -1. In option C, it is positive 1. So that leaves only B.

Answer:

200π

Step-by-step explanation:

Surface area is abbreviated to SA

TOTAL SA of cone = Base area + πrl

Base area = πr² = π x 8² = 64π

Curved SA = πrl = π x 8 x l

to work out l, use pythagoras theorem: √(15)² + (8)² = 17

so, curved SA = π x 8 x 17 = 136π

Total SA of cone = 64π + 136π = 200π

Answer: 23

Step-by-step explanation:

Answer:

Belle is my fav.

Step-by-step explanation:

She loves to read books like me and I hate people who always go out there and try to impress me with something.

Answer:

I would say that is is B

Step-by-step explanation:

Just put the answer

Please make be brainliest or like rate my answer please and thanks <3

Answer:

B. All real numbers

Step-by-step explanation:

I calculated it logically

Answer:

I believe it is all real numbers

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

Explanation:

First factor out the GCF 7

7x^2 + 7x - 42

7*x^2 + 7*x + 7*(-6)

7(x^2 + x - 6)

Now focus on factoring x^2+x-6

We need to find two numbers that multiply to -6 and add to 1. Those values are 3 and -2. That means x^2+x-6 factors to (x+3)(x-2).

The 7(x^2 + x - 6) then turns into 7(x+3)(x-2)

The factor out front, the "7", is the integer factor. The other factors (x+3) and (x-2) are binomial factors.

7, (x + 3), and (x - 2) are the three factors of the given expression.

Mathematical expressions consist of at least two numbers or variables, at least one arithmetic operation, and a statement. It's possible to multiply, divide, add, or subtract with this mathematical operation.

We can factor out the common factor of 7 from the given expression to get:

[tex]7(x^2 + x - 6)[/tex]

Now, we need to factor the quadratic expression x^2 + x - 6. We can do this by finding two numbers that multiply to -6 and add to 1 (the coefficient of x).

The two numbers are 3 and -2, since 3 x -2 = -6 and 3 + (-2) = 1.

So we can write [tex]x^2 + x - 6[/tex] as (x + 3)(x - 2).

Substituting this back into the expression we have:

[tex]7(x + 3)(x - 2)[/tex]

Therefore, the three factors are 7, (x + 3), and (x - 2).

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Answer:

The 95% confidence interval for the proportion of water specimens that contain detectable levels of lead is (0.472,0.766).

Step-by-step explanation:

In a sample with a number n of people surveyed with a probability of a success of [tex]\pi[/tex], and a confidence level of [tex]1-\alpha[/tex], we have the following confidence interval of proportions.

[tex]\pi \pm z\sqrt{\frac{\pi(1-\pi)}{n}}[/tex]

In which

z is the zscore that has a pvalue of [tex]1 - \frac{\alpha}{2}[/tex].

In a sample of 42 water specimens taken from a construction site, 26 contained detectable levels of lead.

This means that [tex]n = 42, \pi = \frac{26}{42} = 0.619[/tex]

95% confidence level

So [tex]\alpha = 0.05[/tex], z is the value of Z that has a pvalue of [tex]1 - \frac{0.05}{2} = 0.975[/tex], so [tex]Z = 1.96[/tex].

The lower limit of this interval is:

[tex]\pi - z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.619 - 1.96\sqrt{\frac{0.619*0.381}{42}} = 0.472[/tex]

The upper limit of this interval is:

[tex]\pi + z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.619 + 1.96\sqrt{\frac{0.619*0.381}{42}} = 0.766[/tex]

The 95% confidence interval for the proportion of water specimens that contain detectable levels of lead is (0.472,0.766).

Answer:

Solution given:

height[p]=20m

angle of depression [a]=25°

base[b]=?

we have

Tan a=p/b

tan 25=20/b

b=20/tan25

b=42.89 or 43

the tower is 43m far from the vehicle .

Answer:

u² + 2u + 1

Step-by-step explanation:

In the question it's asking to find the the number in the blank to make the expression a perfect square.

Let the number in the blank be 'x'.

To guess 'x' , use the algebraic identity :- [tex](a + b)^2 = a^2 + (2 \times a \times b) + b^2[/tex]

While matching the expression with identity , the expression will look like this :- u² + 2ux + x²

In the expression given in the question , it's "2u" but after matching the expression with identity , it is found to be "2ux".

⇒ x = 1 (∵ If x will be 1 , then 2ux = 2×u×1 = 2u)

⇒ x² = 1

∴ The number in the blank is 1.

Answer:

27.2

Step-by-step explanation:

all you have to do is divide the numerator by the denominator.

The amount of fabric he purchased expressed as a decimal will be;

⇒ 27.2

A decimal number is a number that consists of a whole and a fractional part.

Given that;

Robert purchased 136/5 yards of fabric to make curtains.

Now,

Since, Robert purchased 136/5 yards of fabric to make curtains.

Hence, It can be written as;

⇒ 136/5 = 27.2

Thus, The amount of fabric he purchased = 27.2

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Answer:

3, 8

Step-by-step explanation:

19x__=9x__-5

24x_=9x_

8x_=3x_

8x3=3x8

24=24

Answer:

Rent

Step-by-step explanation:

I think

Answer:

17

Step-by-step explanation:

Answer:

1) Yes

2) No

Step-by-step explanation:

1) x+6=14. To solve this you first have to isolate x by subtracting 6 from both sides. x=8. This means that it is correct.

2) s/4=5. To solve this you have to isolate s. You can do this by multiplying 4 in both sides. this will make the equation s=5x4. Simplify to get s=20. 20 is not equal to 24 so it is no.

If this has helped please mark as brainliest

Answer:

(-5, -7)

Step-by-step explanation:

-x, y-> -x, -y

Answer:

Step-by-step explanation:

Is that what you mean? If it is the picture shows

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Answer:

  an = 2(-4)^(n-1)

Step-by-step explanation:

The general form of the explicit formula for a geometric series with first term a1 and common ratio r is ...

  an = a1·r^(n-1)

Your sequence has a1=2 and r=-8/2 = -4. So, the explicit formula is ...

  an = 2(-4)^(n-1)

Answer:

I have no idea lol (what math is this-)

Step-by-step explanation:

uhh- my brain is telling me to add the x and y numbers row by row together, like 2+1, 3+2, 4+3, ect, but I am pretty sure that's completely wrong XD, sorry for not being able to help QVQb, hope you figure it out lol

Answer:

It's just negative, just enter this sign -

Step-by-step explanation:

The coordinates of the point on the unit circle at an angle -135° are [tex](-\frac{\sqrt{2} }{2} ,-\frac{\sqrt{2} }{2} )[/tex]

"The coordinates of any point on the circle [tex]x^{2}+ y^{2}= r^{2}[/tex] are [tex](r~cos\theta,r~sin\theta)[/tex]"

sin(A ± B) = sin(A)cos(B) ± cos(A)sin(B)

cos(A - B) = cos(A)cos(B) + sin(A)sin(B)

For given question,

We need to find the coordinates of the point on the unit circle at an angle -135°

We know, for unit circle radius = 1

So, the coordinates of any point on the unit circle would be [tex](cos\theta, sin\theta)[/tex]

Here, [tex]\theta=-135^{\circ}[/tex]

Now, we find the the value of [tex]sin(-135^{\circ}),~cos(-135^{\circ})[/tex]

[tex]sin(-135^{\circ})\\\\=-sin(135^{\circ})\\\\=-sin(180^{\circ}-45^{\circ})\\\\=-[sin(180^{\circ})cos(45^{\circ})-cos(180^{\circ})sin(45^{\circ})]\\\\=-[0\times \frac{1}{\sqrt{2} }-(-1)\times \frac{1}{\sqrt{2} } ]\\\\=-(0+\frac{1}{\sqrt{2} } )\\\\=-\frac{1}{\sqrt{2} }\\\\=-\frac{1\times \sqrt{2} }{\sqrt{2} \times \sqrt{2} }\\\\=-\frac{\sqrt{2} }{2}[/tex]

and cos(-135°) would be,

[tex]cos(-135^{\circ})\\\\=cos(135^{\circ})\\\\=cos(180^{\circ}-45^{\circ})\\\\=cos(180^{\circ})sin(45^{\circ})+sin(180^{\circ})sin(45^{\circ})\\\\=((-1)\times \frac{1}{\sqrt{2}} )+(0\times \frac{1}{\sqrt{2} }) \\\\=-\frac{1}{\sqrt{2} }+0\\\\ =-\frac{1}{\sqrt{2}}\\\\=-\frac{1\times \sqrt{2} }{\sqrt{2}\times \sqrt{2}}\\\\=-\frac{\sqrt{2} }{2}[/tex]

Therefore, the coordinates of the point on the unit circle at an angle -135° are [tex](-\frac{\sqrt{2} }{2} ,-\frac{\sqrt{2} }{2} )[/tex]

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Answer:

  B)  4 2/8 ounces

Step-by-step explanation:

After 5/8 of the dough was used for pizza, the remaining amount is ...

  1 -5/8 = 3/8

The difference between the amounts is then ...

  (5/8×17 oz) - (3/8×17 oz) = (5/8 -3/8)×17 oz = 2/8×17 oz = 34/8 oz

  = 4 2/8 oz

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Answer:

  3 seconds

Step-by-step explanation:

We want to find t when h=0.

  0 = 2t² -5t -3 . . . . . . . divide by -8

  0 = (2t +1)(t -3) . . . . . . factor

The values of t that satisfy this equation are the values that make the factors zero: t = -1/2, t = 3. The positive value is the one of interest.

It takes 3 seconds for the object to hit the ground.