Answer: She lined up the front numbers instead of the decimal places.
Step-by-step explanation:
A correct addition or subtraction in decimals should be lining up decimal places in order to make sure that you are adding or subtracting in the same place.
1.56 + 13.47=15.03
Hope this helps!! :)
Set up the division problem in long division format.<span><span>66</span><span>22</span><span>99</span></span>Move the decimal the same amount of places in both numbers until the divisor is a whole number.<span><span>66</span><span>22</span><span>99</span></span>Divide <span>2929</span> by <span>66</span> to get <span>44</span>. Place this next digit in the quotient on top of the division symbol.<span><span>44</span><span><span>66</span><span>22</span><span>99</span></span></span>Multiply the newest quotient digit (<span>44</span>) by the divisor <span>66</span>.<span><span>44</span><span><span>66</span><span>22</span><span>99</span></span><span><span>−-</span><span>22</span><span>44</span></span></span>Subtract <span>2424</span> from <span>2929</span> to get <span>55</span>.<span><span>44</span><span><span>66</span><span>22</span><span>99</span></span><span><span>−-</span><span>22</span><span>44</span></span><span>55</span></span>The result of division of <span><span>296</span><span>296</span></span> is <span>44</span> with a remainder of <span>55</span>.<span>44</span> <span>rr</span> <span>5</span>
Answer:
220.8 in.²
Step-by-step explanation:
Area of the pyramid = area of the square + 4(area of the triangle)
Area of square = s²
s = 9.2 in.
Area of the square = 9.2² = 84.64 cm²
✔️Area of the 4 triangles = 4(½*bh)
b = 9.2 in.
h = 7.4 in.
Area = 4(½*9.2*7.4) = 136.16 in²
✅Surface area = 84.64 + 136.16 = 220.8 in.²
She forgot to distribute the 2 fully.
ie. After the 3 to the 9x.
It should have been,
2(3 + 9x) - 2x
6 + 18x - 2x
6 + 16x
Equation 1) 10x + 2y = 30
Equation 2) 4x + y = 4
Multiply all of equation 2 by 2.
2) 2(4x + y = 4)
2) 8x + 2y = 8
1) 10x + 2y = 30
Subtract equations from each other.
-2x = -22
Divide both sides by -2.
x = -22/-2
x = 11
B) x = 11
~Hope I helped!~