4a + 6b = 10
2a - 4b = 12...multiply by -2
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4a + 6b = 10
-4a + 8b = - 24 (result of multiplying by -2)
------------------add
14b = - 14
b = -14/14
b = -1
2a - 4b = 12
2a - 4(-1) = 12
2a + 4 = 12
2a = 12 - 4
2a = 8
a = 8/2
a = 4
so 12a = 12(4) = 48 <==
Answer:
498
Step-by-step explanation:
6 × 83
Using distiributive property
We can solve the expression by using a method called decomposing the multiplier.
= 6 × (80 + 3)
= 6 × 80 + 6 × 3
= 480 + 18
= 498
Answer:
The dentist can make 6 packages using all toothbrushes and tubes of toothpaste
Hope this helps:)
Answer:
y=-x-7
Step-by-step explanation:
Read Fiss's answer, they did it correctly
Answer:
13 feet
Step-by-step explanation:
you can use the Pythagorean Theorem to solve this problem because the man standing on the ground forms a 90 degree angle
5² + 12² = c²
25 + 144 = c²
169 = c²
c = √169 which is 13
