Sum means add
sum of twice a number and 19 means 2b+19
at least means greater than or equal to
2b+19≥-27
to solve
minus 19 both sides
2b≥-46
divide both sides by 2
b≥-23
de number is at least -23
The answer is 3283
in word form its three thousand, two hundred, eighty three
The second option, 7 rolls of quarters and 4 rolls of dimes.
7*10=70
4*5=20
70+20=90
Answer is <span>16y + 7z
</span><span><span><span><span>9y</span>+<span>11z</span></span>+<span>7y</span></span>−<span>4z
</span></span><span>=<span><span><span><span><span>9y</span>+<span>11z</span></span>+<span>7y</span></span>+</span>−<span>4z
</span></span></span>Combine Like Terms:
<span>=<span><span><span><span>9y</span>+<span>11z</span></span>+<span>7y</span></span>+<span>−<span>4z
</span></span></span></span><span>=<span><span>(<span><span>9y</span>+<span>7y</span></span>)</span>+<span>(<span><span>11z</span>+<span>−<span>4z</span></span></span>)
</span></span></span><span>=<span><span>16y</span>+<span>7z</span></span></span><span>
</span>