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Studentka2010 [4]
3 years ago
13

How do you do this problem?

Mathematics
2 answers:
Snowcat [4.5K]3 years ago
7 0
By the use of substitution:for x,

2x-3y=21 ;

will equal 2x-3 (3-x)=21

2x-9+3x=21

5x=30

x=6.

for y:

since y equals 3-x;

y=3-6=-3
astra-53 [7]3 years ago
5 0
By substitution is how to solve

2x-3y=21
y=3-x

2x-3(3-x)=21 
2x-9+3x=21
5x=30
x= 6

now substitute our x value into y=3-x
so we get 

y=3-6 = -3

so x=6 and y=-3  hope this helps!!!!! Thank you!
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What is the value of the slope of the graph of distance versus time, and what does the slope represent?
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A. -4,0,2<br> B. -2,0,4<br> C. -5,0,17<br> D. -17,0,5
Lostsunrise [7]

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You have three

-4,0, and 2 or the answer choice A

Step-by-step explanation:

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2 years ago
Kara did a survey to determine to study the types of pets that students in her school had. She surveyed 300 students and found t
julsineya [31]

Answer:

(C)81

Step-by-step explanation:

Total Number of Students =300

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Percentage who had neither cats nor dogs, n(C \cup D)' =45%

Now:

Universal Set, U = n(C)+n(D)-n(C \cap D)+n(C \cup D)'

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3 0
3 years ago
Item 16
alexdok [17]

Answer:

Step-by-step explanation:

Given that the dresser is in shape of a rectangular prism

Note that, a rectangular prism has a shape of a cuboid

So, area of the rectangular prism is same as area of a cuboid

A = (2LB + 2LH + 2BH)

Where

L is length

B is breadth

H is height

Then, given the dimension of the rectangular prism to be

2ft by 2ft by 6ft

Then, you can assume that,

Length L = 2ft

Breadth B = 2ft

Height H = 6ft.

NOTE: you can take you assumption anyhow, there is no standard, you will get the same answer.

Then,

A = (2LB + 2LH + 2BH)

A = (2×2×2 + 2×2×6 + 2×2×6)

A = (8 + 24 + 24)

A = 56 ft²

The total surface area of the dresser is 56ft²

8 0
3 years ago
Read 2 more answers
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