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Alex787 [66]
3 years ago
7

Evaluate. x-y/7 for x= 18 and y=4 x-y/7= __ ​(Simplify your​ answer.)

Mathematics
1 answer:
Alik [6]3 years ago
7 0
First I plug everything in so 18-4/7
then I solve the first part of the equation 18-4= 14
then I solve the second part which would be 14/7= 2
so your answer is 2
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I have nooooo clue, please help
Aleksandr-060686 [28]

Answer:

case a) x^{2}=3y ----> open up

case b) x^{2}=-10y ----> open down

case c) y^{2}=-2x ----> open left

case d) y^{2}=6x ----> open right

Step-by-step explanation:

we know that

1) The general equation of a vertical parabola is equal to

y=a(x-h)^{2}+k

where

a is a coefficient

(h,k) is the vertex

If a>0 ----> the parabola open upward and the vertex is a minimum

If a<0 ----> the parabola open downward and the vertex is a maximum

2) The general equation of a horizontal parabola is equal to

x=a(y-k)^{2}+h

where

a is a coefficient

(h,k) is the vertex

If a>0 ----> the parabola open to the right

If a<0 ----> the parabola open to the left

Verify each case

case a) we have

x^{2}=3y

so

y=(1/3)x^{2}

a=(1/3)

so

a>0

therefore

The parabola open up

case b) we have

x^{2}=-10y

so

y=-(1/10)x^{2}

a=-(1/10)

a

therefore

The parabola open down

case c) we have

y^{2}=-2x

so

x=-(1/2)y^{2}

a=-(1/2)

a

therefore

The parabola open to the left

case d) we have

y^{2}=6x

so

x=(1/6)y^{2}

a=(1/6)

a>0

therefore

The parabola open to the right

3 0
3 years ago
Which number sentence shows the correct placement of the decimal point in the product, based on the two factors?
Lana71 [14]

2.52 * 27.94 = 70.4088, so not that one

94.1 * 2.5 = 235.25, so not that one

1.83 * 2.9 = 5.307, so not that one

25.07 * 5.4 = 135.378, so that one

Answer:

D. 25.07 * 5.4 = 135.378

3 0
3 years ago
Read 2 more answers
Please help!!!!!!! How many inches would a point on the outer edge of the large gear travel in a 150º rotation? (The gear has a
damaskus [11]
In a full rotation, 360°, a point on the edge of a gear would travel a distance equal to its circumference.  The circumference of a circle is:

C=2πr, and since we are only traveling 150°, we need to set up an appropriate ratio for circumference to the distance the point travels:

d/C=150/360

d=5C/12 and since C=2πr

d=10πr/12

d=5πr/12, and since r=4in

d=5*4π/12 in

d=20π/12 in

d=5π/3 in

d≈5.24 in (to nearest hundredth of an inch)
4 0
3 years ago
The length of a rectangle is equal to tripled the width period the perimeter of the rectangle is 96 cm. What are the dimensions
Sladkaya [172]
738366338928292928bahajsjsjkajww
6 0
3 years ago
(x+2)(x+5) find the following products by using distributive property
nika2105 [10]

Answer:

To multiply these two terms you multiply each individual term in the left parenthesis by each individual term in the right parenthesis.

(

x

+

5

)

(

x

+

2

)

becomes:

(

x

×

x

)

+

(

x

×

2

)

+

(

5

×

x

)

+

(

5

×

2

)

x

2

+

2

x

+

5

x

+

10

We can now combine like terms:

x

2

+

(

2

+

5

)

x

+

10

x

2

+

7

x

+

10

Step-by-step explanation:

7 0
3 years ago
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