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guajiro [1.7K]
3 years ago
13

Find the product of (t + 8) and (3t-7)

Mathematics
1 answer:
Amanda [17]3 years ago
8 0
3t^2+17t-56 is the answer
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A formula for the normal systolic blood pressure for a man age A, measured in mmHg, is given as P=0.006A2−0.02A+120. Find the ag
Ahat [919]

Answer:

33 years

Step-by-step explanation:

Given the quadratic model :

P=0.006A2−0.02A+120

P = blood pressure ; A = Age

Given a blood pressure value of 126 mmHg ; the age, A will be ;

The equation becomes :

126 = 0.006A2−0.02A+120

0.006A² - 0.02A + 120 - 126 = 0

0.006A² - 0.02A - 6 = 0

Using the quadratic formula :

-b ± (√b²-4ac) / 2a

a = 0.006 ; b = - 0.02 ; c = - 6

Using calculator :

The roots are :

a = 33.333 or a = - 30

Age cannot be negative, hence, the age, A will be 33.333

Total the nearest year ; Age = 33 years

4 0
3 years ago
A bag has 6 RED marbles and 9 Blue marbles in it. What is the ratio probability of pulling a Red marble out of the bag ?
finlep [7]

Answer:

6:9

Step-by-step explanation:

5 0
4 years ago
Read 2 more answers
Current estimates are that about 25% of all deaths are due to cancer, and of the deaths that are due to cancer, 30% are attribut
Aliun [14]

Answer:

(a) P (T|C) = 0.30, P (T|D) = 0.40 and P (O|C) = 0.30

(b) The probability that a death is due to cancer and tobacco is 0.075.

Step-by-step explanation:

Let us denote the events as follows:

C = death is due to cancer

T = cause of cancer was tobacco

D = cause of cancer was diet

O = cause of cancer was other issue

The provided information is:

P (C) = 0.25

P (T|C) = 0.30

P (T|D) = 0.40

P (O|C) = 0.30

(a)

The conditional probability of an event <em>A</em> given that another event <em>B</em> has already occurred is denoted by, P (A|B).

This implies that the occurrence of event B is affected by the previously occurred event A.

Causes of cancer are tobacco, diet and other issues. If a death is caused by cancer then the probability that the cause of cancer was tobacco or diet or something else are conditional events.

The conditional probabilities are:

0.40 for diet, 0.30 for tobacco and 0.30 for other causes.

(b)

Conditional probability formula is:

P (A|B)=\frac{P(A\cap B)}{P(B)}

Compute the probability that a death is due to cancer and tobacco as follows:

P (T|C)=\frac{P(C\cap T)}{P(C)}\\P(C\cap T)=P(T|C)\times P(C)\\=0.30\times0.25\\=0.075

Thus, the probability that a death is due to cancer and tobacco is 0.075.

8 0
3 years ago
The ratio of the areas of two similar polygons is 64:36. if the perimeter of the first polygon is 35 cm, what is the perimeter o
konstantin123 [22]
105/4
because the ratio of the perimeter of the first to second is 4/3
5 0
3 years ago
Will drank 3⁄4 of a cup of milk at breakfast and 5⁄6 of a cup of milk at lunch. How much milk did he drink in total?
coldgirl [10]

Answer:

1  7/12   cups

Step-by-step explanation:

3/4 + 5/6

LCM of 4 and 6 is 12 so we have

9/12 + 10/12

=19 / 12

= 1  7/12 cups of milk


5 0
3 years ago
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