Answer:
Tens digit, x = 3
Unit digit, y = 8
Number = 38
Step-by-step explanation:
Let the 2 digit number = xy
y = x + 5 - - - (1)
10x + y = 4(x + y) - 6
10x + x + 5 = 4(x + x + 5) - 6
11x + 5 = 4(2x + 5) - 6
11x + 5 = 8x + 20 - 6
11x + 5 = 8x + 14
11x - 8x = 14 - 5
3x = 9
x = 9/3
x = 3
From (1)
y = x + 5
y = 3 + 5
y = 8
If f(x) = 2x -6+4
Then
f(-2) = 2(-2) -2
f(-2) = -6
Answer:
That'd be 6 miles per course.
Step-by-step explanation:
Let c represent the length of the entire course. Then (3/5)c = 3 3/5 miles.
Solve for c by mult. both sides of this eqn. by (5/3): c = (5/3)(18/5) = 6 miles
<span><span><span>7p</span>−<span>(<span><span>3p</span>+4</span>)</span></span>=<span><span>−<span>2<span>(<span><span>2p</span>−1</span>)</span></span></span>+10
</span></span><span><span><span><span>7p</span>+<span><span>−1</span><span>(<span><span>3p</span>+4</span>)</span></span></span>=<span><span>−<span>2<span>(<span><span>2p</span>−1</span>)</span></span></span>+10</span></span>(Distribute the Negative Sign)
</span><span><span><span><span>7p</span>+<span><span>−1</span><span>(<span>3p</span>)</span></span></span>+<span><span>(<span>−1</span>)</span><span>(4)</span></span></span>=<span><span>−<span>2<span>(<span><span>2p</span>−1</span>)</span></span></span>+10
</span></span><span><span><span><span><span><span>7p</span>+</span>−<span>3p</span></span>+</span>−4</span>=<span><span>−<span>2<span>(<span><span>2p</span>−1</span>)</span></span></span>+10
</span></span><span><span><span><span><span><span><span>7p</span>+</span>−<span>3p</span></span>+</span>−4</span>=<span><span><span><span>(<span>−2</span>)</span><span>(<span>2p</span>)</span></span>+<span><span>(<span>−2</span>)</span><span>(<span>−1</span>)</span></span></span>+10</span></span>(Distribute)
</span><span><span><span><span><span><span>7p</span>+</span>−<span>3p</span></span>+</span>−4</span>=<span><span><span>−<span>4p</span></span>+2</span>+10
</span></span><span><span><span><span>(<span><span>7p</span>+<span>−<span>3p</span></span></span>)</span>+<span>(<span>−4</span>)</span></span>=<span><span>(<span>−<span>4p</span></span>)</span>+<span>(<span>2+10</span>)</span></span></span>(Combine Like Terms)
</span><span><span><span>4p</span>+<span>−4</span></span>=<span><span>−<span>4p</span></span>+12
</span></span><span><span><span>4p</span>−4</span>=<span><span>−<span>4p</span></span>+12
</span></span><span>Add 4p to both sides.
</span><span><span><span><span>4p</span>−4</span>+<span>4p</span></span>=<span><span><span>−<span>4p</span></span>+12</span>+<span>4p
</span></span></span><span><span><span>8p</span>−4</span>=12
</span>Add 4 to both sides.
<span><span><span><span>8p</span>−4</span>+4</span>=<span>12+4
</span></span><span><span>8p</span>=16
</span><span>Divide both sides by 8
p=2 <----final answer :)
</span><span />
1: C
2: B
I think, sorry if it is incorrect. :(