Answer:
Step-by-step explanation:
Length (L)= 2x - 3 cm
Breadth (b) = x + 7 cm
Area of the rectangle
= L * b
= ( 2x - 3)(x+ 7)
= 2x(x + 7) - 3(x + 7)
= 2x² + 14x - 3x - 21
=( 2x² + 11x - 21) cm²
hope it helps
<span>Cone Volume = (<span>π<span> • r² •<span> h) ÷ 3
radius^2 = 3 * cone volume / PI * height
</span></span></span></span><span>radius^2 = 3 * 423.9 / 3.14159 * 5
</span>radius^2 =
<span>
<span>
<span>
80.9590048351
</span>
</span>
</span>
radius =
<span>
<span>
<span>
8.9977222026
</span>
</span>
</span>
rounds to 9
Answer
33
Step-by-step explanation:
11 of the faces is a square.
\begin{aligned} \text{Area of a square} &= \text{side} \cdot \text{side}\\\\ &= 3 \cdot 3\\\\ &= {\blueD{9}} \\\\ \end{aligned}
Area of a square
=side⋅side
=3⋅3
=9
Hint #22 / 4
444 of the faces are triangles. Each triangle has the same base and height.
\begin{aligned} \text{Area of a triangle} &= \dfrac12 \cdot \text{base} \cdot \text{height}\\\\ &= \dfrac12 \cdot 3 \cdot 4\\\\ &= 6 \\\\ \end{aligned}
Area of a triangle
=
2
1
⋅base⋅height
=
2
1
⋅3⋅4
=6
The total area of these 444 triangles is 4 \cdot 6 = \greenD{24}4⋅6=244, dot, 6, equals, start color #1fab54, 24, end color #1fab54.
Hint #33 / 4
Let's add the areas we found to find the surface area.
\begin{aligned} \text{Surface area} &= \blueD{9}+ \greenD{24}\\\\ &= 33\\\\ \end{aligned}
Surface area
=9+24
=33
Hint #44 / 4
The surface area of this square pyramid is 333333 units^2
2
squared.
- 5 1/4 <span>÷ 2 3/4 =
= - 21/4 </span><span>÷ 11/4
= - 21/4 * 4/11
= - 21/11
= - 1 10/11
</span>
Answer:
10
Step-by-step explanation:
7-(-3)
=7+3
=10
Hope this is helpful
