Seven seems right. hope this helped!
Area of a trapezoid, A = 1/2 × (a + b) h, where a = 19 cm, b = 23 cm & h = 14 cm.
By substitution, we have
A = 1/2 × (19 + 23)14
= 1/2 × 14(19 + 23)
= 1/2 × 14(42)
= 7(42)
= 294 sq. cm
<span> 3( x + 1 ) = - 2 ( x - 1 ) + 6 </span>
<span>1) Clear the parentheses by distributing the 3 and the - 2 </span>
<span>When you have done that, this is what you will get: </span>
<span>3x + 3 = - 2x + 2 + 6 </span>
<span>2) Combine the like terms on the right </span>
<span>You will get this: </span>
<span>3x + 3 = - 2x + 8 </span>
<span>3) Add 2x to both sides to collect all the x terms together on the same side </span>
<span>When you finish doing that, you will have </span>
<span>5x + 3 = 8 </span>
<span>4) Subtract 3 from both sides to isolate the 5x term alone on one side </span>
<span>You will get </span>
<span>5x = 5 </span>
<span>5) Divide both sides by 5 to isolate x </span>
<span>x = 1 <-- answer</span>
4/3 • pie r^3 is what my math teacher says