mary correctly drew the bar diagram below to model a problem which problem does the bar diagram represent A. mary answered 12 out of 30 questions correctly what percent correct did she earn B. mary answered 30 percent of 12 questions correctly how many questions did she answer correctly C. mary answered 12 questions correctly on a test this is 30 percent of the test how many questions were on the test D. there were 12 questions on a test and mary answered 30 percent of them correctly how many questions did she answer correctly

4.867 × 10^24 kg

0.815 M⊕4.867 × 10^24 4.867 × 10^24 kg

0.815 M⊕4.867 × 10^24 kg

0.815 M⊕

0.815 M⊕

g

Step-by-step explanation:

4.867 × 10^24 kg kg

0.815 M⊕4.867 × 10^24 4.867 × 10^24 kg

0.815 M⊕4.867 × 10^24 kg

0.815 M⊕

0.815 M⊕

g

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