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natali 33 [55]
3 years ago
9

Which expresión Is true and could you explain it

Mathematics
1 answer:
Verdich [7]3 years ago
8 0
First equation 
L.H.S = 4x -0.25y 
so it doesn't equal the R.H.S 

2nd equation 
R.H.S = 15q + 3qr 
so it doesn't equal the L.H.S 

3rd equation 
R.H.S = -30m -60n 
so R.H.S doesn't equal L.H.S 

4th equation 
L.H.S = -16a +4 
so L.H.S equal R.H.S 

The answer is D
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What is 45% of 432? and how?
mr Goodwill [35]
1. We assume, that the number 432 is 100% - because it's the output value of the task. 
<span>2. We assume, that x is the value we are looking for. </span>
<span>3. If 432 is 100%, so we can write it down as 432=100%. </span>
<span>4. We know, that x is 45% of the output value, so we can write it down as x=45%. </span>
5. Now we have two simple equations:
1) 432=100%
2) x=45%
where left sides of both of them have the same units, and both right sides have the same units, so we can do something like that:
432/x=100%/45%
6. Now we just have to solve the simple equation, and we will get the solution we are looking for.

7. Solution for what is 45% of 432

432/x=100/45
<span>(432/x)*x=(100/45)*x       - </span>we multiply both sides of the equation by x
<span>432=2.22222222222*x       - </span>we divide both sides of the equation by (2.22222222222) to get x
<span>432/2.22222222222=x </span>
<span>194.4=x </span>
x=194.4

<span>now we have: </span>
<span>45% of 432=194.4</span>
6 0
4 years ago
Read 2 more answers
Sue has baked 3 different types of circular cake, all measuring 8 inches across. There are equal numbers of coffee cakes and lem
Mekhanik [1.2K]
1) suppose for purposes of calculation that the cake <span>is </span><span>inscribed in a square</span> of 8 by 8
the area of 1 cake=8*8=64 in²
the rectangular table area=576 in²-----> I assume square table 24 in x 24 in
576/64= 9----------- > Sue has baked 9 cakes

if just 1 <span>carrot cake
</span>then
(9-1)=8 ---------->  <span>coffee cakes and lemon cakes
we know that </span><span>equal numbers of coffee cakes and lemon cakes
</span>therefore
coffee cakes=8/2=4
lemon cakes=4
carrot cake=1

the answer part 1) is
<span>the dimensions of the table are 24 in x 24 in
</span>the answer part 2) is
Sue has baked 9 cakes
coffee cakes=4
lemon cakes=4
carrot cake=1

part 3) distribution of the cakes in the table 24  in x 24 in
answer

let
Z------->carrot cake
C------->coffee cakes
L------->lemon cakes

Z-C-L  or      C-L-C
C-L-C           Z-C-L
L-C-L           C-L-C



8 0
4 years ago
Which of the following is equal to 7 1/4?
marysya [2.9K]

Answer:

C

Step-by-step explanation:

7^{\tfrac 14} = \sqrt[4]{7}

4 0
3 years ago
Which of the lines below is a line of symmetry?​
natulia [17]

Answer:

d. both

Step-by-step explanation:

rectangle have 2 lines of symmetry

3 0
4 years ago
Simplify the expression below. (10x+1)3x+5(5x)
Katen [24]

Answer:

38x

Step-by-step explanation:

{(10x+1)3x}+5(5x)

10x+3x+25x=38x

5 0
3 years ago
Read 2 more answers
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