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elena-s [515]
3 years ago
9

Write an equation in point-slope form of the line that passes through the point (4,7) and has a slope of -1

Mathematics
1 answer:
monitta3 years ago
8 0

Answer:

3x+y=9 has slope -3. A line in the plane and parallel to the given equation's line also has slope -3. To also pass through a point (4,-7), the equation for this line is y%2B7=-3%28x-4%29, in the point-slope form.

Step-by-step explanation:

i hope this helps P. S Im still a Elementary hindi ko po alam lahat sorry

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Solve the system of equations using substitution
Andru [333]

Answer:

x = 136/11 , y = 68/11

Step-by-step explanation:

Solve the following system:

{6 x - y = 68

2 y = x

Hint: | Choose an equation and a variable to solve for.

In the second equation, look to solve for x:

{6 x - y = 68

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Hint: | Reverse the equality in 2 y = x in order to isolate x to the left hand side.

2 y = x is equivalent to x = 2 y:

{6 x - y = 68

x = 2 y

Hint: | Perform a substitution.

Substitute x = 2 y into the first equation:

{11 y = 68

x = 2 y

Hint: | Choose an equation and a variable to solve for.

In the first equation, look to solve for y:

{11 y = 68

x = 2 y

Hint: | Solve for y.

Divide both sides by 11:

{y = 68/11

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Hint: | Perform a back substitution.

Substitute y = 68/11 into the second equation:

{y = 68/11

x = 136/11

Hint: | Sort results.

Collect results in alphabetical order:

Answer: {x = 136/11 , y = 68/11

7 0
3 years ago
If the radius of a circle is 16 units, what is its area? (Use pie for it)
krok68 [10]

Answer:

804.25unit^2

Step-by-step explanation:

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Answer:

B

Step-by-step explanation:

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B. 49 + (-12) = 49-12. They're the same thing  because 49 minus 12 can also be written as 49 plus negative 12

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D. 12- 49 = -37 which isn't equivalent to 49-12.

Hope this helps!!!

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0 A maker of a certain brand of low-fat cereal bars claims that the average saturated fat content is 0.5 gram. In a random sampl
balandron [24]

Answer:

<em>The first step is to determine the average </em>

x= \frac{0,6+0,7+ 0,7+0,3+0,4+ 0,5+ 0,4 +0,2}{8}\\\ x= 0,475

<em>The exercise says it’s a normal distribution: (n=8)</em>

s^{2}= \frac{1}{n-1} ((0,6.x)^2+2(0,7-x)^2+(0.3-x)^2+2(0.4-x)^2+(0.5-x)^2+(0.2-x)^2)\\\ \frac{1}{7}*0,235 = 0,0336 \\\\ s= 0183

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<em />

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<em>The variable t has 7 grade to liberty, we calculate the p-value as: </em>

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This value is very high, therefore the hypothesis is not rejected

7 0
3 years ago
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