All categories

3 years ago

I need help i dont understand this

Mathematics

1 answer:

Nata [24]3 years ago

5 0

Answer:

Step-by-step explanation:

Given the 2 equations

4x + 8y = 21 → (1)

y = - $\frac{1}{2}$ x + 3 → (2)

Substitute y = - $\frac{1}{2}$ x + 3 into (1)

4x + 8(- $\frac{1}{2}$ x + 3 ) = 21 ← distribute parenthesis on left side

4x - 4x + 24 = 21 ( subtract 24 from both sides )

0 = - 3 ← not possible

This indicates the system has no solutions

You might be interested in

Evaluate the expression when, c=3. c²-5c+2 Thank you! :)

11111nata11111 [884]

Answer:

-4

Step-by-step explanation:

$c^2-5c+2\\=3^2-5(3)+2\\=9-15+2\\=(-6)+2\\=-4$

7 0

3 years ago

Read 2 more answers

What is the value of y in the equation 4y – 2(1 – y) = –44? –23 –15 –14 –7

user100 [1]

Answer:

-7

Step-by-step explanation:

4 0

3 years ago

68.397384 rounded to the nearest hundredth

Evgen [1.6K]

Answer:

the answer is 68.397

Step-by-step explanation:

becasue you round 3 down on the 4 digit after the decimal

4 0

3 years ago

Read 2 more answers

Which represents the solution to the inequality 4x + 7(3x - 3) ≤ 9 - 5x in interval notation

Nuetrik [128]

Answer:

Isolate the variable by dividing each side by factors that don't contain the variable.

Inequality Form:

x < 1

Interval Notation:

( − ∞, 1)

3 0

3 years ago

Which expressions are equivalent to_____? Check all that apply.

Alinara [238K]

Option 1. $(-2)(5x) + (-2)(-\frac{3}{4})$ and option 4. $-10x + \frac{3}{2}$ are equivalent to $-2(5x-\frac{3}{4} ).$

Step-by-step explanation:

Step 1:

The given expression is expanded as follows.

The -2 is multiplied with the 5x and then the -2 is multiplied with the $-\frac{3}{4}$ .

So the expression becomes as follows;

$-2(5x-\frac{3}{4} ) = (-2)(5x) + (-2)(-\frac{3}{4}).$

This is the first option given so the first expression is equivalent.

Step 2:

$-2(5x-\frac{3}{4} ) = (-2)(5x) + (-2)(-\frac{3}{4}) = -10x + \frac{6}{4} = -10x + \frac{3}{2} .$

Of the other four options, only the fourth expression has the fraction $\frac{3}{2}$ so the fourth expression is also equivalent.

Expressions 1 and 4 are equivalent to the given expression.

5 0

3 years ago

I need help i dont understand this​

I need help i dont understand this