Determine which of the ordered pair is a solution for the equation 2x-3y=7 a. (7,7) b. (-4,-5) c. (-9,10) d. (9,4)

We could use a graphing calculator to solve this easily, but let's just solve it by looking at the equation.

We'll need to turn this standard form equation into a slope-intercept form equation to be able to easily solve it.

Isolate y.

2x - 3y = 7

Add 3y to both sides.

2x = 3y + 7

Subtract 7 from both sides.

3y = 2x - 7

Divide both sides by 3.

y = 2/3x -7/3

Now, we can plug each x value in the answer choices into x to find the corresponding y value.

y = 2/3(7) - 7/3 = 2.34

As this y value does not match, A is not the answer.

y = 2/3(-4) - 7/3 = -5

This y value does match, so B is the correct answer.

y = 2/3(-9) - 7/3 = -8.34

This y value doesn't match either, so C is not the answer.

y = 2/3(9) - 7/3 = 3.67

This y value doesn't match either, so D is not the answer.

answer: 0.95, d

step-by-step explanation:

first, you have to combine the percentages of costumers ordering pizza or salad. 25% (percent of salads ordered) plus 70% (percent of pizzas ordered) is equal to 95%. then, turn 95% into a fraction: 95/100. lastly, divide 95 by 100 and you will get 0.95, d.

constant acceleration- a

constant velocity- c

no velocity or acceleration- b

explanation:

for body moving with a constant acceleration, the rate of change of displacement changes over time. this is proven by the increasing gradient of the curve (a) against time.

a body that is moving at constant velocity covers equal distances over equal periods of time, thus the straight line with a constant gradient c.

a stationary body   covers no displacement as time elapses. thus the flat line with   zero gradient.