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4 years ago

Help please and thanks!

Mathematics

2 answers:

sdas [7]4 years ago

5 0

A,b are both 45 degrees
c, d are both 90 degrees
add it all together 270 degrees

Alex787 [66]4 years ago

3 0

Your answer will be D

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a notebook is on sale for $1.50 with a 20% discount. what is the new sales price?(set up percent proportain and subtract discoun

taurus [48]

Answer:

your price would be 1.20 dollars and you saved 0.30 cents! hope this helped! :D

3 0

3 years ago

Which expression is equivalent to 6(4(6x-4y)-5) ?

iren2701 [21]

Answer:

$144x - 96y - 30$

Step-by-step explanation:

Step 1: Distribute

$6(4(6x - 4y) - 5)$

$6((4 * 6x) + (4 * -4y) - 5)$

$6(24x - 16y - 5)$

Step 2: Distribute again

$(6 * 24x) + (6 * -16y) + (6 * -5)$

$144x - 96y - 30$

Answer: $144x - 96y - 30$

8 0

3 years ago

2 неlр

kotykmax [81]

Estimated bill amount is $57

Step-by-step explanation:

Step 1:

Round off the cost of 1 appetizer.

Cost of 1 appetizer = $6.50 ≈ $7

Step 2:

Find the cost of 2 main courses.

Cost of 1 main course = $15.75 ≈ $16

∴ Cost of 2 main courses = 2 × 16 = $32

Step 3:

Find cost of 2 drinks.

Cost of 1 drink = $2.25 ≈ $2

∴ Cost of 2 drinks = 2 × 2 = $4

Step 4:

Find the cost of 2 desserts.

Cost of 1 dessert = $7.25 ≈ $7

∴ Cost of 2 desserts = 7 × 2 = $14

Step 5:

Add all and find the total cost.

Estimated Total bill amount = 7 + 32 + 4 + 14 = $57

3 0

3 years ago

7/5 2/3 the unit rate

REY [17]

Answer:

30 miles ÷ 2.5

2.5 hours ÷ 2.5

12 miles

1 hour

12 miles

hour

= 12 miles per hour

hope this helped ✨

7 0

3 years ago

The reflector of a satellite dish is in the shape of a parabola with a diameter of 4 feet and a depth of 2 feet. To get the maxi

Free_Kalibri [48]

Answer:

$x^2 = 2y$ --- equation

$(x,y) = (0,\frac{1}{2})$ --- focus

$y = -\frac{1}{2}$ --- directrix

$Width = 2$ ---- focal width

Step-by-step explanation:

Given

$depth = 2$

$diameter = 4$

Required

The equation of parabola

The depth represents the y-axis. So:

$y = 2$

The diameter represents how the parabola is evenly distributed across the x-axis.

We have:

$diameter = 4$

-2 to 2 is 4 units.

So:

$x = [-2,2]$

So, the coordinates of the parabola is:

$(-2,2)\ and\ (2,2)$

The equation of the parabola is calculated using:

$x^2 = 4py$

Substitute (-2,2) for (x,y)

$(-2)^2 = 4p*2$

$4 = 8p$

Divide by 8

$p = \frac{4}{8}$

$p = \frac{1}{2}$

So, the equation is:

$x^2 = 4py$

$x^2 = 4 * \frac{1}{2} * y$

$x^2 = 2y$

The defining features

(a) Focus

The focus is located at:

$(x,y) = (0,p)$

$(x,y) = (0,\frac{1}{2})$

(b) Directrix (y)

$y = -p$

$y = -\frac{1}{2}$

(c) Focal width

$Width = 4p$

$Width = 4*\frac{1}{2}$

$Width = 2$

8 0

3 years ago