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Ira Lisetskai [31]
2 years ago
14

5x + 4 = -6 please step by step explanation

Mathematics
2 answers:
adoni [48]2 years ago
7 0
5x + 4 = -6
-4 -4
5x = -10
— —
5 5
x = -2
Setler79 [48]2 years ago
3 0

Answer:

x=-2

Step-by-step explanation:

5x+4=-6 so basically what you want to do is try to get x by itself

step 1 subtract 4 from each side

5x=-10

step 2 divide each side by 5

x=-2

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James determined that these two expressions were equivalent expressions using the values of x = 4 and x = 6. Which statements ar
GaryK [48]

Answer:

The expressions 7x + 4 and 3x + 5 + 4x = 1 are equivalent for every value of x.

Step-by-step explanation:

Expressions - 7x + 4 and 3x + 5 + 4x = 1.

1. When x = 2, both expressions have a value of 18. Let's find out:

1st expression : 7(2) + 4 = 14+4 = 18

2nd expression : 3(2) + 5 + 4(2) = 1

or 6 + 5 + 8 - 1 = 18

Values of both the expressions is 18, hence it is correct statement.

2.The expressions are only equivalent for x = 4 and x = 6.

This is incorrect statement as we just calculated above that the expressions are equivalent for x = 2. Hence, it is incorrect.

3. The expressions have equivalent values for any value of x.

Say, x = 0, then,

7x + 4 = 7 (0) + 4 = 4 and,

3x + 5 + 4x - 1 =  3(0) + 5 + 4(0) - 1  = 5-1 = 4

The statement holds.

Let's try again for x = 12,

7x + 4 = 7(12) + 4 = 88 and,

3x + 5 + 4x - 1 =  3(12) + 5 + 4(12) - 1  = 36 + 5 + 48 -1 =  88

Let's try again for x = 13,

7x + 4 = 7(13) + 4 = 95 and,

3x + 5 + 4x - 1 =  3(13) + 5 + 4(13) - 1  = 39 + 5 + 52 -1 =  95

Clearly, it holds for every value of x, whether it is odd or even. Hence, it is correct statement.

_______________________________________________________

Trick: 7x + 4 = 0....(1) and,

3x + 5 + 4x = 1

Rearranging the terms of above expression, we get,

(3x + 4x) + (5 - 1) =0

or 7x + 4 = 0...(2)

clearly both (1) & (2) are equivalent.

_____________________________________________________

4 0
2 years ago
Please help me, thanks if you do
Olenka [21]

Answer:

y= -28

Step-by-step explanation:

x -y = 11

if x= -17 then substitute x for -17

-17 -y = 11; add 17 to both sides

-17 + 17 -y = 11+ 17; combine like terms

-y = 28; multiply both sides by -1

y= -28

3 0
2 years ago
Read 2 more answers
A cyclist rides her bike at a rate of 15 miles per hour. What is this rate in kilometers per hour? How many kilometers will the
zubka84 [21]

Answer:

The cyclist will have traveled 72 kilometers with-in 3 hours.

Step-by-step explanation:

1 mile (s) = 1.60934 kilometer(s)

15 miles = 24.1402// 24 kilometers

by 3 hours:

45 miles = 72/72.4205 kilometers

5 0
3 years ago
Factorise 2x^2-9x-5 By Splitting The Middle Term.​
laiz [17]

▪▪▪▪▪▪▪▪▪▪▪▪▪  {\huge\mathfrak{Answer}}▪▪▪▪▪▪▪▪▪▪▪▪▪▪

The required expression is ~

\boxed{(2x + 1)(x - 5)}

▪▪▪▪▪▪▪▪▪▪▪▪▪  {\huge\mathfrak{Answer}}▪▪▪▪▪▪▪▪▪▪▪▪▪▪

let's solve ~

  • 2 {x}^{2}  - 9x - 5

  • 2 {x}^{2}  - 10x + x - 5

  • 2x(x - 5) + 1(x - 5)

  • (2x + 1)(x - 5)

5 0
2 years ago
257<br> What names apply to this number
LenaWriter [7]

Answer:

Step-by-step explanation:

Whole, integer, rational, real

4 0
3 years ago
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