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Firdavs [7]
3 years ago
14

Solve each substitution ( I need help )

Mathematics
1 answer:
lozanna [386]3 years ago
5 0
In each of the problems, one of the equations is solved for y. Just plug in what y is equal to into the other equation.

1.) Plug -3 in for y.
-3 = 7x - 10
7x = 7
x = 1

2.) Plug -8 in for y.
-8 = -2x - 12
-2x = 4
x = -2

9.) Plug -8x in for y.
2x + 4(-8x) = 0
2x - 32x = 0
-30x = 0
x = 0

10.) Plug 2x in for y.
6x + 7(2x) = 20
6x + 14x = 20
20x = 20
x = 1


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The drawing shows a stack of alternating cups. The cups are 9.2 cm high. How many cups will fit in a door that is 211.77 cm high
KIM [24]

Answer:

The total number of whole cups that we can fit in the dispenser is 25

Step-by-step explanation:

It is given that the height of each cup is 20 cm.

But when we stack them one on top of the other, they only add a height of 0.8 to the stack.  

The stack of cups has to be put in a dispenser of height 30 cm.

So we need o find out how many cups can fit in the dispenser.

Since the first cup is 20 cm high, the height cannot be reduced. So the space to fit in the remaining cups in the stack is only 30-20 cm as that’s the remaining space in the dispenser

So,

30 - 20 = 10 cm

To stack the other cups we have 10 cm of height remaining

As we know that addition of each adds 0.8 cm to the stack, the total number of cups that can be fit in the dispenser can be calculated by the following equation. Let the number of cups other than the first cup be denoted by ‘x’.

10 + 0.8x = 30

0.8x = 20

x = 25

The total number of cups that we can fit in dispenser is 25

7 0
3 years ago
Please help me in a rush
vova2212 [387]

5.89 x 5 = 29.45

Hope this helps you!

Always remember you are a Work Of Art!

- Nicole :) <3

3 0
4 years ago
Read 2 more answers
20 points+Will give brilliant:
creativ13 [48]
1. No
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4 0
3 years ago
Could you please answer Number 2? This is for geometry
katrin [286]
Answer: 108 degrees

============================================================

Explanation:

Angle ABC is given to be 90 degrees. By the converse of Thales Theorem, we know that AC is a diameter of the circle. 
If we draw a line from A to C, it will pass through the center of the circle.

Therefore, arc AC is 180 degrees as this is half the distance around the circle.

minor arc AD = 72
minor arc CD = x
(minor arc AD) + (minor arc CD) = arc AC
72+x = 180
72+x-72 = 180-72
x = 108

minor arc CD is 108 degrees
7 0
4 years ago
To get from North to East, you walk 12 meters south and 16 meters east, as shown
Pavlova-9 [17]

Answer:

ur pito is to small

Step-by-step explanation:

it to little

5 0
3 years ago
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