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3 years ago

Solve: negative 1/2 x + 1 = –x + 8 7 1/2 14 18

Mathematics

1 answer:

Marina86 [1]3 years ago

3 0

The answer is x=14/3

so basically C., hope this helps

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Find the equation of the tangent at ( 0 , 2) to the circle with equation

erica [24]

Answer:

if this is high school i cant do it

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2 years ago

35 out of 50 students in a class wear glasses. What percentage of students in the class wear glasses?

Mashutka [201]

Answer:

70%

Step-by-step explanation:

Percentage is out of 100

35/50 change denominator

multiply both numerator and denominator by 2

70/100= 70%

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2 years ago

Prove that the triangle EDF is isosceles. Give reasons for your answer.

Gekata [30.6K]

Answer:

$\triangle EDF$ is isosceles.

Step-by-step explanation:

Please have a look at the attached figure.

We are given the following things:

$\angle EDF = y$

$\text{External }\angle DFG = 90 +\dfrac{y}{2}$

Let us try to find out $\angle E$ and $\angle DFE$ . After that we will compare them.

Finding  $\angle DFE$ :

Side EG is a straight line so $\angle GFE = 180$

$\angle GFE$ is sum of internal $\angle DFE$ and external $\angle DFG$

$\angle GFE = 180 = \angle DFE + \angle DFG\\\Rightarrow 180 = \angle DFE + (90+\dfrac{y}{2})\\\Rightarrow \angle DFE = 180 - 90 - \dfrac{y}{2}\\\Rightarrow \angle DFE = 90 - \dfrac{y}{2} ....... (1)$

Finding  $\angle E$ :

Property of external angle: External angle in a triangle is equal to the sum of two opposite internal angles of a triangle.

i.e. external $\angle DFG$ = $\angle E + \angle EDF$

$\Rightarrow 90+\dfrac{y}{2} = \angle E + y\\\Rightarrow \angle E = 90+\dfrac{y}{2} -y\\\Rightarrow \angle E = 90-\dfrac{y}{2} ....... (2)$

Comparing equations (1) and (2):

It can be clearly seen that:

$\angle DFE = \angle E =90-\dfrac{y}{2}$

The two angles of $\triangle EDF$ are equal hence $\triangle EDF$ is isosceles.

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3 years ago

Name a pair of adjacent complementary angles

Art [367]

Step-by-step explanation:

$\angle \: ABD = 30 \degree \\ and \\ \angle \:CBD = 60 \degree \\ are \: a \: pair \: of \: adjacent \: complementary \: \\ angles.$

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3 years ago

In three separate stock trades Dale los $560, gained $850, and lost $280. What was the net result of the three trades?

romanna [79]

Answer:

$10 profit

Step-by-step explanation:

560+280=840

850-840=10

5 0

2 years ago