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kifflom [539]
3 years ago
14

Two fifth of a certain number plus two is equal to ten​

Mathematics
1 answer:
Fed [463]3 years ago
3 0

Answer:

that no. is 20

Step-by-step explanation:

let us take that certain no. as x

so

2/5. x +2=10

2x/5 = 10-2

2x = 8×5

x= 40/2

x= 20

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A number has been round to 7700.what might the number
ankoles [38]
7699......................
3 0
3 years ago
Write an equation of the line that passes through (2,−5) and is parallel to the line 2y=3x+10
LenaWriter [7]

Step-by-step explanation:

Divide two on both sides to get rid of it and the make the equation in the form y = mx + c

\frac{2}{2} y = \frac{3}{2} x +  \frac{10}{2}

y = 3/2x + 5

since both lines are parallel they must have the same gradient which is 3/2

y = 3/2x + c

All you have to do now is to replace x and y with (2, -5) to find c

x = 2

y = -5

-5 = 3/2 × 2 + c

-5 = 3 + c

c = -5-3

c = -8

y  = \frac{3}{2} x  - 8

8 0
3 years ago
PLEASE HELP !!!!
My name is Ann [436]
1day=24 hours
10 days=240hours

60mins=1hr
30mins=1/2hr

total is 240hr+21hr+0.5hr=261.5hr


total is 261.5hr
7 0
3 years ago
What is 15 divided by 390
Anna11 [10]
So,

15/390 = 5/130 = 1/26

In decimal form, that is 0.03846153846...
4 0
3 years ago
Read 2 more answers
What is the y-value of the vertex of the function f(x) = –(x + 8)(x – 14)?
maxonik [38]

we have

f(x)=-(x+8)(x-14)

Convert to vertex form

f(x)=-(x+8)(x-14)\\f(x)=-( x^{2}-14x+8x-112) \\f(x)=-( x^{2}-6x-112)\\f(x)=-x^{2}+6x+112

we know that

the equation of a vertical parabola in vertex form is equal to

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

where

(h,k) is the vertex

f(x)=-x^{2}+6x+112

Group terms that contain the same variable, and move the constant to the opposite side of the equation

f(x)-112=-(x^{2}-6x)

Complete the square. Remember to balance the equation by adding the same constants to each side

f(x)-112-9=-(x^{2}-6x+9)

f(x)-121=-(x^{2}-6x+9)

Rewrite as perfect squares

f(x)-121=-(x-3)^{2}

f(x)=-(x-3)^{2}+121

the vertex is the point (3,121)

therefore

<u>the answer is </u>

The y-value of the vertex is 121

8 0
3 years ago
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