First answer will be marked brainlest

if two angles are complementary angles they can be

a. obtuse angles

b. supplementary angles

c. acute angles

d. linear pairs

Option C: acute angles

Step-by-step explanation:

Option A: Obtuse angles

Obtuse angle is an angle which is more 90° and less than 180°. Complementary angles are angles whose sum is 90°. Hence, Obtuse angles is not a correct answer.

Option B: Supplementary angles

Supplementary angle is an angle whose sum is 180°. Complementary angles are angles whose sum is 90°. Hence, Supplementary angles is not a correct answer.

Option C: Acute angle

Acute angle is an angle which is less than 90°. Complementary angles are angles whose sum is 90°. Hence, Acute angle is the correct answer.

Option D: Linear pairs

Two angles are said to be linear if the sum of two angles is 180°. Complementary angles are angles whose sum is 90°. Hence, Obtuse angles is not a correct answer.

Hence, If two angles are complementary angles they can be acute angles.

5x + 3y = - 4

step-by-step explanation:

the equation of a line in standard form is

ax + by = c ( a is a positive integer and b, c are integers )

express the line first of all in slope- intercept form

y = mx + c ( m is the slope and c the y-intercept )

to calculate m use the gradient formula

m = ( y₂ - y₁ ) / ( x₂ - x₁ )

with (x₁, y₁ ) = (7, - 3) and (x₂, y₂ ) = (4, - 8)

m = = -

y = - x + c ← is the partial equation

to find c substitute either of the 2 points into the partial equation

using (4, - 8 ), then

- 8 = - + c ⇒ c = -

y = - x - ← in slope-intercept form

multiply all terms by 3 to eliminate the fractions

3y = - 5x - 4 ( add 5x to both sides )

5x + 3y = - 4 ← in standard form