MATHEMATICS COLLEGE

what is the rule for solving proportions? A. The sum of the means is the product of the extremes. B. The product of the means is equal to the product of the extremes. C. The product of the extremes is twice the product of the means.

Answers

Answer 1
Answer: The rule is that :
B. The product of the means is equal to the product of the extremes

Related Questions

HIGH SCHOOL

A person's systolic blood pressure, which is measured in millimeters of mercury (mm Hg), depends on a person's age, in years. The equation: P = 0.007 y 2 − 0.01 y + 122
gives a person's blood pressure, P , at age y years.

A.) Find the systolic pressure, to the nearest tenth of a millimeter, for a person of age 44 years.

B.) If a person's systolic pressure is 133.36 mm Hg, what is their age (rounded to the nearest whole year)?

Answers

Answer:

(A)The systolic pressure of a person of age 44 is 135.1 mm Hg

(B) If a person's systolic pressure is 133.36 mm Hg, their age is 41 years.

Step-by-step explanation:

Given : P = 0.007 y² - 0.01 y +122

where P is systolic pressure and y is age of a person

(A) Here age of the person, y =44

So, P =0.007 (44²) -0.01 (44) +122 = 13.552 -0.44 +122 = 135.112 =135.1 mm

∴ The systolic pressure of a person of age 44 is 135.1 mm Hg

(B) Here P = 133.36 mm Hg

So,

133.36 = 0.007 y² - 0.01 y +122

=>0.007 y² -0.01 y -11.36 =0

=> 7 y² -10 y -11360 =0

Solving the above quadratic equation using quadratic formula, we have

or

y = 41 or y = -39.57

Since age cannot be negative, y= 41

∴ If a person's systolic pressure is 133.36 mm Hg, their age is 41 years.

MIDDLE SCHOOL

The width of the rectangle is x inches and the length is (6v+7).Writen an equivalent expression to represent the perimeter of the rectangle (6v+7+v+6v+7+v.

Answers

P= 6v+7+v+6v+7+v
Perimeter equals 2 times length plus width

EQUIVALENT EXPRESSION
P= 2(length + width)
P= 2(v+6v+7)

Hope this helps! :)
MIDDLE SCHOOL

A regular #2 pencil can draw a line about 35 miles long or write roughly 45,000 words. How many words will fit in one mile?

Answers

45,000 words=35 miles
x words=1 mile
Divide 45,000 by 35 to get the unit rate for words per mile.
45000/35=1285.71429
About 1,285.71 words per mile.

Hope this helps :)
HIGH SCHOOL

This dot plot shows the number of cakes sold each day in aunt alice's cake shop last month. what is the median number of cakes sold each day?

Answers

Answer:

The median is 2.

Step-by-step explanation:

I just did the test :)

Answer:

the answer should be 2

Step-by-step explanation:

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