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3 years ago

If ZDCE is an obtuse angle. CF bisects ZDCE.MZDCF = 2? + 4 and m DCE = 3z? – 7x, what is the value of x?

Mathematics

1 answer:

lord [1]3 years ago

5 0

Answer:

x=2.345208,−2.345208

Step-by-step explanation:

x²+4=3x²−7

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Miss tate travels from st. louis to indianapolis and back 12 times each year . the total distance of each round trip is 484 mile

Maurinko [17]

Answer:

12x484=5808

Take 484x12 should be answer

5 0

4 years ago

-3 2/7 times .14 as a decimal and a fraction

LenaWriter [7]

Answer:

-0.46 or -23/50

Step-by-step explanation:

We note that 0.14 is easily divisible by 7, so we can do this using the distributive property:

(-3 2/7)(0.14) = (-1)(3 + 2/7)(0.14)

= (-1)(3×0.14 +2/7×0.14)

= (-1)(0.42 +0.04)

= -0.46 . . . . . decimal form

= -46/100 . . . . place value

= -23/50 . . . . remove common factor of 2; fraction form

The product is -0.46 or -23/50.

3 0

4 years ago

I dont know what to do.

Scorpion4ik [409]

Slope= $\frac{ y_{2}- y_{1} }{ x_{2} - x_{1} }$

(3,5) and (1,9)
x1=3
y1=5
x2=1
y2=9

Slope= $\frac{ y_{2}- y_{1} }{ x_{2} - x_{1} }$
Slope= $\frac{ 9- 5 }{ 1 - 3}$
Slope= $\frac{4}{ -2}$
Slope= $-\frac{4}{2} or -2$

Answer:Slope=-2

3 0

4 years ago

M(7, 5) is the midpoint of line RS The coordinates of S are (8, 7). What are the coordinates of R?

Shtirlitz [24]

Answer:

The coordinates of point R are (6 , 3)

Step-by-step explanation:

* Lets revise the rule of the mid-point

- The mid point (x , y)of a line whose end points are $(x_{1},y_{1})$

and $(x_{2},y_{2})$ is $(\frac{x_{1}+x_{2}}{2},\frac{y_{1}+y_{2}}{2})$

∵ M is the mid point of line RS

∵ The coordinates of point M are (7 , 5)

∴ x = 7 and y = 5

∵ The coordinates of point R are $(x_{1},y_{1})$

∵ The coordinates of point S are (8 , 7)

∴ $(x_{2},y_{2})$ = (8 , 7)

∴ $x_{2}=8$ and $y_{2}=7$

- By using the rule above

∵ $x=\frac{x_{1}+x_{2}}{2}$

∵ $7=\frac{x_{1}+8}{2}$

- Multiply both sides by 2

∴ $14=x_{1}+8$

- Subtract both sides by 8

∴ $x_{1}=6$

∴ the x-coordinate of point R is 6

∵ $y=\frac{y_{1}+y_{2}}{2}$

∵ $5=\frac{y_{1}+7}{2}$

- Multiply both sides by 2

∴ $10=y_{1}+7$

- Subtract both sides by 7

∴ $y_{1}=3$

∴ the y-coordinate of point R is 3

* The coordinates of point R are (6 , 3)

6 0

3 years ago

Please help me with this kahn assignment!<br> Thank you

Maru [420]

Answer:

$7^{8}$

Step-by-step explanation:

When you multiply exponential numbers with the same base number, you have to add the exponents. So add 2 and 6 because the numbers share 7 as base.

please give brainliest if it helped:)

4 0

3 years ago