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2 years ago

Which statements about quadrilaterals are true? Check all that apply.

Mathematics

2 answers:

andrey2020 [161]2 years ago

7 0

Step-by-step explanation:

They are all polygons with four sides.

The sum of the measures of their interior angles is 360°.

professor190 [17]2 years ago

6 0

Answer:

2. The sum of the measures of their interior angles is 360º.

3. They are all polygons with four sides.

5. A square is a rectangle and a parallelogram, but not a trapezoid.

Step-by-step explanation:

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Determine the values of the parameter s for which the system has a unique solution, and describe the solution. sx 1 minus 2 sx

JulijaS [17]

Note: The equations written in this questions are not appropriately expressed, however, i will work with hypothetical equations that will enable you to solve any problems of this kind.

Answer:

For the system of equations to be unique, s can take all values except 2 and -2

Step-by-step explanation:

$2sx_{1} + 4x_{2} = -3\\2x_{1} + sx_{2} = 4$

$\left[\begin{array}{ccc}2s&4\\2&s\end{array}\right] \left[\begin{array}{ccc}x_{1} \\x_{2} \end{array}\right] = \left[\begin{array}{ccc}-3 \\6 \end{array}\right]$

For the system to have a unique solution, $\begin{vmatrix} 2s & 4 \\ 2 & s \end{vmatrix} \neq 0$

$2s^{2} -8 \neq 0\\2s^{2}\neq 8\\s^{2}\neq 4\\s \neq 2 or -2$

6 0

3 years ago

-3B+5=13<br> How do I solve for B

Eddi Din [679]

Answer:

b = -2 2/3

Step-by-step explanation:

Isolate the variable, b. Note the equal sign, what you do to one side, you do to the other. Do the opposite of PEMDAS.

First, subtract 5 from both sides:

-3b + 5 (-5) = 13 (-5)

-3b = 13 - 5

-3b = 8

Next, divide -3 from both sides:

(-3b)/-3 = (8)/-3

b = -8/3

b = -2 2/3

7 0

3 years ago

Hey there!<br><br> Can you help me please ? Thanks!

Vinil7 [7]

A. (140x110)+[(50x70)/2] = 15,400+1750= 17,150cm^2

b. (4x6)/2= 12cm^2

5 0

3 years ago

Read 2 more answers

Eva is at a sushi restaurant. She ordered 2 pieces of squid for a total of $3.50, 1 piece of eel for $3.25, 3 pieces of tuna for

mixas84 [53]

Answer:

squid, crab, tuna, eel

Step-by-step explanation:

Just make each sushi piece into an equation, then solve it.

For example, for the squid: (s stands for squid)

$2s = 3.5\\ s=1.75$ Divide both sides by 2 to get "s" by itself

Eel: (e stands for eel)

e = 3.25

Tuna: (t stands for tuna)

$3t=6.75\\ t=2.25$ Divide both sides by 3 to get "t" by itself

Crab: (c stands for crab)

$4c=8\\ c=2$ Divide both sides by 4 to get "c" by itself

**Then order from least to greatest**

6 0

2 years ago

Read 2 more answers

Traveling at 65 miles per hour, how many minutes, rounded to the nearest whole number, does it take to drive 125 miles from San

DENIUS [597]

$1h=60min\\\\65\ mi\ -\ 1\ h=60\ min\\\\125\ mi-\ x\ min\\\\cross\ multiply\\\\65\cdot x=125\cdot60\\\\65x=7500\ \ \ |divide\ both\ sides\ by\ 65\\\\x=\dfrac{7500}{65}\approx115\\\\Answer:\boxed{115\ min}$

6 0

3 years ago