Answer:
MRS. White graded 51 papers.
Step-by-step explanation:
85/100= 0.85
0.85 x 60 = 51
<span>=<span><span>(<span><span>4x</span>+<span>−5</span></span>)</span><span>(<span><span>3x</span>+2</span>)</span></span></span><span>=<span><span><span><span><span>(<span>4x</span>)</span><span>(<span>3x</span>)</span></span>+<span><span>(<span>4x</span>)</span><span>(2)</span></span></span>+<span><span>(<span>−5</span>)</span><span>(<span>3x</span>)</span></span></span>+<span><span>(<span>−5</span>)</span><span>(2)</span></span></span></span><span>=<span><span><span><span>12<span>x2</span></span>+<span>8x</span></span>−<span>15x</span></span>−10</span></span><span>=<span><span><span>12<span>x2</span></span>−<span>7x</span></span>−<span>10</span></span></span>
Answer: x = 28
Step-by-step explanation:
3x+10+3x+2=180
6x+12=180
6x=168
x = 28
First you make it so that both the equations are in standard form which is ax+by=c. Then solve for each variable by substitution or elimination. The answer would be C. x=3