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wolverine [178]
2 years ago
9

Fourteen subtracted from 2 times a number is 28. Write an equation?

Mathematics
1 answer:
Alecsey [184]2 years ago
5 0

Step-by-step explanation:

let the unknown number be x

1St step: twice the number is 2(x) =2x

2nd step: 2x -14

3rd step: 2x - 14=28...

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Which equation does not represent a line with an x-intercept of 3?
Gwar [14]

Answer: D. y=3x-1 does not =3

Step-by-step explanation:

To find the x-intercept, we let y=0 and solve for x. 

Using choice A: 

0=-2x+6 

2x=6 

x=3 

Using choice B: 

0=− 1/3x + 1

1/3x = 1

x = 3

Using choice C: 

0= 2/3x−2 

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x=3 

Using choice D: 

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x=−1/3

So, the correct answer is choice D. Does NOT = 3

5 0
1 year ago
Read 2 more answers
The base of a solid oblique pyramid is an equilateral triangle with an edge length of s units.
Assoli18 [71]

Answer:

Option B is correct.i.e.,

Step-by-step explanation:

Given: Pyramid with equilateral triangle as base

           Length of side of equilateral triangle = s unit

to find: height of equilateral triangle

Here we use a property of equilateral triangle.

Perpendicular from a vertex on a side and median of that side of a triangle is same in equilateral triangle.

All heights are of equal length. So, we just need to find one height or length of 1 altitude.

Figure of base triangle is attached

In Δ ABC

AB = BC = AC = s unit

AD is height

BD = \frac{BC}{2}\:=\:\frac{s}{2}\:units

Now, In Δ ABD

using pythagoras theorem

BD² + AD² = AB²

(\frac{s}{2})^2+AD^2=s^2

\frac{s^2}{4}+AD^2=s^2

AD^2=s^2-\frac{s^2}{4}

AD^2=\frac{4s^2-s^2}{4}

AD^2=\frac{3s^2}{4}

AD=\sqrt{\frac{3s^2}{4}}

AD=\frac{\sqrt{3}s}{2}

AD=\frac{s}{2}\sqrt{3}

Therefore, Option B is correct.i.e., \frac{s}{2}\sqrt{3}

4 0
3 years ago
Read 2 more answers
X-y=11 if x=4 wat is y
Nata [24]
Let's see this original ewuation:
x-y=11
1) Substitute 4 in for x: 4-y=11
2)Subtract 4 from both sides. This cancels out four. (4-4)-y=11-4
3)Cancel: -y=7
4)Multiply both sides by negative 1:-1*-y=11*-1 \\ y=-11

y=-11
4 0
3 years ago
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