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8 months ago

Which is NOT always true?A rectangle is a parallelogramA square is a rhombusA rhombus is a rectangleA square is a rectangle

Mathematics

1 answer:

Lemur [1.5K]8 months ago

4 0

EXPLANATION

-A rectangle is a parallelogram. True. Every rectangle is a parallelogram.

-A square is a rhombus. True. Every square is a rhombus.

Every rhombus is a rectangle-->This is NOT always true when the rhombus has not right angles.

-True --> A square is a special type of rectangle because it possesses all the properties of a rectangle.

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Apr 22, 12:47:51PM

trapecia [35]

Your straight line is east-west

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2 years ago

Sally has six more 34 cent stamps than 52 cent stamps. If her stamps amount to 11.50 how many of each stamp does she have?

Yuliya22 [10]

Let x be the number of 52 cent stamps that Sally has and let y be the number of 34 cent stamps that she has.

Then,

52x + 34y = 1150 --- (1)

Also, she has six more 34 cent stamps than 52 cent stamps.

Therefore, y = x + 6

(1) becomes

52x + 34(x + 6) = 1150

52x + 34x + 204 = 1150

86x + 204 = 1150

86x = 1150 - 204

86x = 946

x = 11

and y = 11 + 6 = 17

Hence, Sally has eleven 52 cent stamps and seventeen 34 cent stamps.

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2 years ago

Read 2 more answers

PLEASE HELP ASAP GIVING BRAINLIEST

Lady_Fox [76]

Answer:

Part 1) $y=32.5x+11.95$

Par 2) see the explanation

Part 3) $\$401.95$

Step-by-step explanation:

Part 1) Write an equation in slope intercept form to represent this problem

Let

x ----> the number of tickets

y ---> the total cost

The linear equation in slope intercept form is equal to

$y=mx+b$

where

m is the slope or unit rate

b is the y-intercept (one-time processing fee)

In this problem we have

$b=\$11.95$

ordered pairs (4,141.95) and (7,239.45)

Find the slope

The formula to calculate the slope between two points is equal to

$m=\frac{y2-y1}{x2-x1}$

substitute the values in the formula

$m=\frac{239.45-141.95}{7-4}$

$m=\frac{97.5}{3}$

$m=32.5$

substitute the values in the linear equation

$y=32.5x+11.95$

Part 2) What does your slope represent in this problem? What does your y-intercept represent in this problem?

a) The slope of the linear equation represent the unit rate, so the slope represents the cost of one ticket

$m=\$32.5\ per\ ticket$

b) The y-intercept is the value of y when the value of x is equal to zero

In this context, the y-intercept represent the one-time processing fee

$b=\$11.95$

Part 3) Use the equation to find how much Alan would have to pay for 12 tickets

For x=12 tickets

substitute in the linear equation

$y=32.5(12)+11.95$

$y=\$401.95$

3 0

2 years ago

I do need help with this problem that includes pi. ^_^

Troyanec [42]

Solution:

Note that:

Circumference = 50.24 ft = 2πr = πd
Dia. = 16 ft.

Divide the diameter both sides.

50.24 ft = πd
=> 50.24/d ft = πd/d
=> 50.24/d ft = π

Substitute the diameter in the equation.

=> 50.24/16 = π (Option A)

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1 year ago

If an object is dropped from a height of 96ft, the function h(t) = -62 + 96 gives the height of the object after t seconds. When

Shalnov [3]

Answer:

Step-by-step explanation:Since we want to know how much time elapsed since the object was launched until it ht the ground. At the ground, the height is 0.

Therefore the equation h(t) = 80t – 16t2 becomes 0= 80t – 16t2

Solving the equation for t gives 80t =16t2 or 16t=80 or t=5sec

The object hits the ground 5 seconds after it is launched.

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2 years ago