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Tema [17]
3 years ago
10

How do I use substitution to solve a system of linear equations?

Mathematics
1 answer:
ELEN [110]3 years ago
7 0

Answer:

for example:

y=2x+4

 3x+y=9

We can substitute y in the second equation with the first equation since y = 2x+4.

  3x+(2x+4)=9

5x+4=9

5x=5

x=1

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30 drinkers were asked whether they like coffee or tea.
Keith_Richards [23]

Answer:

a)22

b)7

c)8

Step-by-step explanation: its really complicated so ill try my best.

so the say 11 like both coffee and tea so that means that they also added 11 to

the other two sections. so if we take 11 away from 18 we get 7, and that's how many people like coffee and not tea. to get answer c) we need to also subtract 11 from 15, which gets us 4. so we have 11 plus 4 plus 7. and that gets us 22.  so 30 subtract 22 gets us 8 so 8 people don't like tea or coffee. 22 is also the answer to a). did you get that? i hope so

3 0
3 years ago
Find the lateral area.<br>10 is the height.
VMariaS [17]

Answer:

The lateral surface area of a cuboid is 180 units² .

Option (c) is correct.

Step-by-step explanation:

Formula

Lateral surface area of a cuboid = 2hl + 2hb

Where h is the height , l is the length and b is the breadth.

As shown in the figure.

Length = 4 units

Breadth = 5 units

Height =  10 units

Put in the formula

Lateral surface area of a box = 2 × 10 × 4 + 2 × 10 × 5

                                                = 80 + 100

                                                = 180 units ²

Therefore the lateral area of the cuboid is 180 units² .

Option (c) is correct.

4 0
3 years ago
G(x)=(x^2+1)(3x-5) what is the value of g(4)?
MAVERICK [17]

g(x) = x^2 + 1(3x - 5)

<em><u>Replace all x's with 4.</u></em>

g(4) = 4^2 + 1(3 * 4 - 5)

g(4) = 16 + 1(12 - 5)

g(4) = 17(7)

g(4) = 119 (This is your answer.)

5 0
3 years ago
What is the greatest commen factor for 32 and 72
ladessa [460]
8 is the greatest component.
8 0
4 years ago
Read 2 more answers
Equivalent Fractions
TEA [102]

Answer:

What is the question????

5 0
3 years ago
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