Answer:
B
Step-by-step explanation:
x + 3y = 7 → (1)
3x + 2y = 0 → (2)
Multiplying (1) by - 3 and adding to (2) will eliminate x
- 3x - 9y = - 21 → (3)
Add (2) and (3) term by term to eliminate x
0 - 7y = - 21
- 7y = - 21 ( divide both sides by - 7 )
y = 3
Substitute y = 3 into either of the 2 equations and solve for x
Substituting into (1)
x + 3(3) = 7
x + 9 = 7 ( subtract 9 from both sides )
x = - 2
solution is (- 2, 3 ) → B
15f-38g
.................
246 rule -10
246, 236, 226, 216, 206...
The answer is A, 236
Answer:
The correct answer is a grid model with 25 squares where 10 squares are shaded.
Step-by-step explanation:
To solve this problem, we should convert each of the scenarios presented into fractions. To do this, we can use the following formula: (squares shaded/total number of squares). This gives us the following fractions:
10/25, 8/25, 10/40, 14/40
We are looking for a fraction that is equivalent to 40%. We should convert this percentage to a decimal by dividing by 100, which gives us 40/100 = 0.4. This means that we are looking for a decimal value of 0.4. To convert the fractions we have to decimals, we must divide each numerator by the denominator. If we do this, we get:
10/25 = 0.4
8/25 = 0.32
10/40 = 0.25
14/40 = 0.35
The 10/25 scenario is the only one that is equivalent to 0.4 (or 40%), thus this is the correct answer.
Hope this helps!