1) 3/4 - 1/2 = 3/4 - 2/4 = 1/4. Vanessa's brothers ate half of the cake.
2) 1.75 + 2.4 = 4.15. 6.5 - 4.15 = 2.35. 4.15 = 2.35 = 1.8. Chad hiked 1.8 ore miles in the morning than in the afternoon.
4x=20
4/4x=20/4
x=5
u want to isolate the variable to solve these equations
By knowing the <em>blood</em> pressure and applying the <em>quadratic</em> formula, the age of a man whose normal <em>blood</em> pressure is 129 mm Hg is 40 years old.
<h3>How to use quadratic equations to determine the age of a man in terms of blood pressure</h3>
In this problem we have a <em>quadratic</em> function that models the <em>blood</em> pressure as a function of age. As the latter is known, we must use the quadratic formula to determine the former:
129 = 0.006 · A² - 0.02 ·A + 120
0.006 · A² - 0.02 · A - 9 = 0

A = 1.667 + 38.733
A = 40
By knowing the <em>blood</em> pressure and applying the <em>quadratic</em> formula, the age of a man whose normal <em>blood</em> pressure is 129 mm Hg is 40 years old.
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Answer:
B.22
Step-by-step explanation:
4+4+7+7=22
Answer:
784 in² of wood
Step-by-step explanation:
Sarah needs two supports by shelf, and she will build 4 shelves
then she will need 8 supports
Now each support is a right isosceles triangle.
Area of a triangle is
A(t) = 1/2 *b*h where b is the base and h is the heigh of the triangle.
A right isosceles triangle has two sides ( base and heigh equals) and in our particular case are equals to 14 in, therefore
A(t) = 1/2*14*14
A(t) = 98 in²
Sarah needs 8 pieces of 98 in² she needs
A = 8*98
A = 784 in² of wood