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3 years ago

Can someone please help me I don’t understand.

Mathematics

1 answer:

Anarel [89]3 years ago

6 0

Whichever store had a better deal you multiply the unit rate price by 20 then put it into Y=MX+B form (there’s calculators online that do it for you)

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If ∠8 measures 116°, what is the measure of ∠1? (Lines b and c are parallel.)

Trava [24]

It is the first one angle 64

4 0

2 years ago

Read 2 more answers

Express the area of a rectangle with length 7ab and width 2a as a monomial.

Lady_Fox [76]

Area of a rectangle is length * width.

7ab * 2a is the same as 7(2) * a(a) * b

7 * 2 = 14
a * a = a²
b = b

Put it all together.

14a²b is your monomial.

5 0

3 years ago

What are the values of the variables

White raven [17]

Answer:

Step-by-step explanation:

we know that according to the isosceles triangle theorem, that the angles of the triangle are 90, 2x+3, 2x+3

from the triangle angle sum theorem, we know that 4x+6 = 90

solving, we get 4x=84, x=21

8 0

2 years ago

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A tunnel is constructed with a semielliptical arch. The width of the tunnel is 60 feet, and the maximum height at the center of

rusak2 [61]

The height of the tunnel 5 feet from the edge is 13.82 feet option second 13.82 feet is correct.

<h3>What is an ellipse?</h3>

An ellipse is a locus of a point that moves in a plane such that the sum of its distances from the two points called focus adds up to a constant. It is taken from the cone by cutting it at an angle.

We have:

A tunnel is constructed with a semi-elliptical arch. The width of the tunnel is 60 feet, and the maximum height at the center of the tunnel is 25 feet.

2a = 60 (width of the tunnel is 60 feet)

a = 30

And the maximum height at the center of the tunnel is 25 feet

b = 25

Let's assume the center of the ellipse is at the origin.

So the equation of the ellipse:

$\rm \dfrac{x^2}{30^2}+\dfrac{y^2}{25^2}=1$

Now plug x = a - 5 = 30 - 5 = 25

$\rm \dfrac{25^2}{30^2}+\dfrac{y^2}{25^2}=1$

After solving:

$\rm \dfrac{y^2}{25^2}=1-\dfrac{25}{36}$

$\rm y^2=\dfrac{6875}{36}$

y = ±13.819 ≈ ±13.82

Height cannot be negative

y = 13.82 feet

Thus, the height of the tunnel 5 feet from the edge is 13.82 feet option second 13.82 feet is correct.

Learn more about the ellipse here:

brainly.com/question/19507943

#SPJ1

5 0

1 year ago

What's the y-intercept of the equation: 5x+2y=20<br>A. (4,0)<br>B. (5,0)<br>C. (0,2)<br>D. (0,10)

AveGali [126]

Answer: D. (0,10)

Why:
Your given equation is 5x+2y=20, so in order to find the y-intercept, we must put it in slope-intercept form, a.k.a. y=max+b.

To do this, subtract 5x from both sides. This will then give you 2y=-5x+20.

And to fully simply, divide both sides by 2. Finally, you get y=(-5/2)x+10. And since we know b in slope-intercept form is the y-intercept, and 10 is b in our final function/equation. We get the answer of y-intercept=(0,10)

4 0

2 years ago