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ivanzaharov [21]
4 years ago
14

Which statements are true for the given quadrilaterals? Choose all answers that are correct. A. All trapezoids are quadrilateral

s. B. All rhombuses are parallelograms. C. All quadrilaterals are parallelograms. D. All rhombuses are squares.
Mathematics
2 answers:
svetlana [45]4 years ago
8 0
Trapezoids always have 4 sides, so this is true. All rhombuses have parallel sides, so B is true also. A trapezoid has two sides that are not parallel, so C is not true. (remember, you only have to find one instance where your statement is false for it to be false) And for D, all rhombuses are kite-shaped so D is not true. A and B are true. Hope this helps. :) 
Tcecarenko [31]4 years ago
7 0

A and B are true im sure of it! Hope it helps!

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What should be the first step in adding these equations to eliminate y<br> 8x+3y= 2<br> + 4x-by=-7
Shtirlitz [24]

Answer:

Step-by-step explanation:

Are you sure you wanted that "b" in the second equation?

If so, here's how we eliminate y:

1) Multiply the first equation by b:  8bx + 3by = 2b

2) Multiply the second equation by 3:  12x - 3by = -21

3) Combine these two results.  We get:

(8b + 12)x = 2b - 21

Here we have eliminated  y, but still have an equation in two variables, b and x.

5 0
3 years ago
Find the other endpoint of the line segment with the given endpoint and midpoint.
Damm [24]

Answer:

Step-by-step explanation:

(x - 3)/2 = 9

x - 3 = 18

x = 21

(y - 5)/2 = 6

y - 5 = 12

y = 17

(21, 17)

3 0
4 years ago
Two bowls and one cup weigh 800 grams. One bowl and two cups weigh 700 grams. Find the weight of the bowl and the cup
antoniya [11.8K]

Answer:

\large \boxed{\textbf{Bowl = 300 g; cup = 200 g}}  

Step-by-step explanation:

 Let b  = the mass of a bowl  

and c = the mass of a cup  

We have two conditions:  

\begin{array}{lrcl}(1) &2b + c  & = & 800\\(2) & b + 2c & = & 700\\\end{array}

Calculations:  

\begin{array}{lrcll}(3) & 4b + 2c &=  & 1600&\text{ Multiplied (1) by 2}\\& 3b & = & 900&\text{Subtracted (2) from (3)}\\(4) & b & = & \mathbf{300}&\text{Divided each side by 3}\\ & 600 + c & = & 800&\text{Substituted (4) into (2}\\ & c & = & \mathbf{200}\\\end{array}\\\text{The mass of a bowl  is $\large \boxed{\textbf{300 g}}$ and that of a cup is $\large \boxed{\textbf{200 g}}$}

Check:

\begin{array}{rlcrl}2(300) + 200& =800 & & 300 + 2(200) & = 700\\600 + 200 & = 800& & 300 + 400 & = 700\\800 & = 800& & 700 & = 700\\\end{array}

OK.

6 0
3 years ago
PLZZZZZZZZZZZZZZZZZZZZZZZZZ HELP WILL GIVE BRAINLIEST
motikmotik

Answer:

Vertical I believe. #Hopethishelps

Step-by-step explanation:


3 0
4 years ago
Read 2 more answers
BRAINLIEST, hurry please!!
tester [92]
The answer i D because 11-6=5
8 0
2 years ago
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