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4 years ago

Solve the following system by graphing.

Mathematics

2 answers:

dmitriy555 [2]4 years ago

7 0

Answer:

Step-by-step explanation:

3 - -1 = 4

3 + -1 = 2

saul85 [17]4 years ago

4 0

Answer:

A. (3,-1)

Step-by-step explanation:

x - y = 4

x + y = 2

2x = 6

x = 3

3 - y = 4

y = -1

Draw two straight lines passing through:

1) (0,-4) and (4,0)

2) (0,2) and (2,0)

You'll see that the two intersect at: (3,-1)

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What number can cancel 15 and 10

Lena [83]

Answer:

Step-by-step explanation:

5 can cancel

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3 years ago

I've got two of these kinds of problems and no clue how to do them, help please!

Bogdan [553]

Hello,

$3x^3+2x^2-3x-2=0\\

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4 years ago

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A set designer builds a model of the stage and the different pieces of furniture on it. He uses a scale of 5 cm to 1 m. What is

Akimi4 [234]

5-1

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3 years ago

Two lighthouses are located 60 miles from one another on a north-south line. If a boat is spotted S 21o E from the northern ligh

jasenka [17]

Answer:

(A)The northern lighthouse is 8.2 miles closer than the southern lighthouse.

Step-by-step explanation:

The triangle attached represents the given problem.

First, let us determine the distance of the Boat from each of the lighthouse.

In Triangle ABC,

∠A+∠B+∠C=180 degrees

21+∠B+16=180

∠B=180-37=143 degrees.

Using Law of Sines

$\frac{a}{Sin A}=\frac{b}{Sin B}\\\frac{a}{Sin 21^0}=\frac{60}{Sin 143^0} \\\text{Cross Multiply}\\a*sin143=60*sin21\\a=60*sin21\div sin143\\a=35.73 miles$

Similarly

$\frac{c}{Sin C}=\frac{b}{Sin B}\\\frac{c}{Sin 16^0}=\frac{60}{Sin 143^0} \\\text{Cross Multiply}\\c*sin143=60*sin16\\c=60*sin16\div sin143\\c=27.48 miles$

Difference in Distance =35.73-27.48=8.25 miles

Therefore, the northern lighthouse is 8.2 miles closer than the southern lighthouse.

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4 years ago

What are the x- and y- intercepts of the graph of 6x-4y=-12?

krek1111 [17]

Y intercept: 3
x intercept: -2

plug in a 0 for x when finding the y intercept, then solve. do the opposite for finding the x intercept. hope this helps!

5 0

4 years ago

Read 2 more answers