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3 years ago

What would you do to solve the system?

1 answer:

6 0

Answer:

Explanation:

12x = 48 - 8y
10x + 8y = 38
———————
12x + 8y = 48
10x + 8y = 38
———————
12x + 8y = 48
-1(10x + 8y = 38)
————————
12x + 8y = 48
-10x - 8y = -38
————————
2x = 10
x = 10/2 = 5

If x = 5 then:
10x + 8y = 38
10(5) + 8y = 38
50 + 8y = 38
8y = 38 - 50
8y = -12
y = -12/8
y = -3/2

Therefore, x = 5 and y = -3/2

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the speed of the current in a creek is 2 mph. A person can kayak 4 mi upstream in the same time that it takes him to kayak 8 mi

grin007 [14]

Answer:

I think 6 mph

Step-by-step explanation:

I needore characters so ingnor this sentence.

4 0

3 years ago

Find the segment length indicated. Assume that lines which appear to be tangent are tangent.

Triss [41]

Answer:

Part 1) The segment length indicated is $6.4\ units$

Part 2) The segment length indicated is $19\ units$

Step-by-step explanation:

Let

x------> the segment length indicated

Part 1)

Applying the Pythagoras Theorem

$(13+x)^{2}=13^{2}+14.4^{2}\\ \\ (169+26x+x^{2})=169+207.36\\ \\x^{2}+26x-207.36=0$

Solve the quadratic equation by graphing

The solution is $x=6.4\ units$

see the attached figure N 1

Part 2)

Applying the Pythagoras Theorem

$x^{2} =11.4^{2}+(7.6+7.6)^{2}\\ \\ x^{2}=129.96+231.04\\ \\x^{2}=361\\ \\x=19\ units$

5 0

4 years ago

What is the measure of <br> < B?

iogann1982 [59]

Answer:

c(<B=73)

Step-by-step explanation:

The two congruent sides have equal base angles

$34 + 2x = 180$

$2x = 180 - 34$

$2x = 146$

$\frac{2x}{2} = \frac{146}{2}$

$x = 73$

hope it was helpful

8 0

3 years ago

I need help please?!!!!):

notsponge [240]

Answer:

k=38

Step-by-step explanation:

add 22 to itself to cancel it out and add it to the 16 as well and you will get k

4 0

3 years ago

Read 2 more answers

IWhat is the equation of a line that passes through the points (3, 6) and (8, 4)?

Rzqust [24]

Answer:

$(x_1 =2, y_1 = 6), (x_2 = 2, y_2 = 4)$

$m =\frac{y_2 -y_1}{x_2 -x_1}$

And replacing we got:

$m=\frac{4-6}{8-3}= -\frac{2}{5}$

And for this case we can use the first point to find the intercept like this:

$6 = -\frac{2}{5}(3) +b$

And solving we got:

$b = 6 +\frac{6}{5}= \frac{36}{5}$

And then the line equation would be given by:

$y = -\frac{2}{5}x +\frac{36}{5}$

Step-by-step explanation:

For this case we have the following two points given:

$(x_1 =2, y_1 = 6), (x_2 = 2, y_2 = 4)$

And for this case we want an equation for a line with the two points given by:

$y = mx+b$

Wher m is the slope and b the y intercept. We can find the slope with this formula:

$m =\frac{y_2 -y_1}{x_2 -x_1}$

And replacing we got:

$m=\frac{4-6}{8-3}= -\frac{2}{5}$

And for this case we can use the first point to find the intercept like this:

$6 = -\frac{2}{5}(3) +b$

And solving we got:

$b = 6 +\frac{6}{5}= \frac{36}{5}$

And then the line equation would be given by:

$y = -\frac{2}{5}x +\frac{36}{5}$

5 0

3 years ago