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Define x :
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Let the numbers be x, x+2 and x+4
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Construct equation :
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The sum of these number is 69
x + x + 2 + x + 4 = 69
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Solve x:
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x + x + 2 + x + 4 = 69
3x + 6 = 69
3x = 63
x = 21
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Find the numbers :
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x = 21
x+ 2 = 23
x + 4 = 25
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Answer: The third number in the sequence is 25.
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To get the answer you should solve the following equation:
So, the 8 batteries cost
$13.84.
Answer:
7 in.
Step-by-step explanation:
When 7 in. is used this is what happens
2(7) + 2(w) = 16 in.
14 + 2w = 16 in.
Because the 7 in. option leaves room for the value of the width unlike the others.
Answer:
the third one ; C i think not sure tho!!
Step-by-step explanation:
Let
a and b----------> the bases <span>of an isosceles trapezoid
c------------------> </span>the legs of an isosceles trapezoid
we know that
<span>if one of the legs is 2/3 of the sum of the bases
</span>so
c=(2/3)*(a+b)
see the attached figure to better understand the problem
[the area of an isosceles trapezoid]=(1/2)*[a+b]*h
A=45 cm²
h=5 cm
45=(1/2)*[a+b]*5--------> 90=[a+b]*5-------> 18=[a+b]------> equation 1
[the perimeter of an isosceles trapezoid]=[a+b]+2*[(2/3)*(a+b)]
[the perimeter of an isosceles trapezoid]=(a+b)+(4/3)*(a+b)---> (7/3)*(a+b)
remember equation 1
[a+b]=18
then
[perimeter]=(7/3)*18-----> 42 cm
the answer isthe perimeter is 42 cm