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2 years ago

Please help me with Q 7 c

Mathematics

2 answers:

frez [133]2 years ago

8 0

Answer:

11.25 km h^-2

Step-by-step explanation:

Acceleration = increase in velocity / time

= 90 - 0 / 8

= 11.25 km h^-2.

DIA [1.3K]2 years ago

4 0

$v_{i} = 0 \: (from \: rest) \\ v_{f} = 90 \: km \: per \: hr \\ t_{i} = 0 \\ t_{f} = 8 \: hr \\ a = \frac{(v_{f} - v_{i})}{(t_{f} - t_{i})} \\ a = \frac{90}{8} \\ a = \frac{45}{4} km/ {hr}^{2}$

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A handyman is tiling a bathroom l. He needs 34 rows of 18 tiles to cover the floor. How many total tiles does he need to cover t

olchik [2.2K]

Answer:

A handyman need 34 rows of 18 tiles.

How many total tiles does he need?

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and there are supposed to be 34 rows

so you can multiply the number of tiles in each row (18) by the number of rows (34)

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2 years ago

Which of the following represents the zeros of f(x) = x3 − 3x2 − 2x + 6?

Mrac [35]

D. {3, √ 2, -√ 2}.
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2 years ago

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Consider the function f(x) = 3x2 + 7x + 2.

Llana [10]

Answer:

Step-by-step explanation:

This function I believe has one x intercept which is (-2/13,0)

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3 years ago

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Find the area, in square feet, of a triangle whose base is 42⁄3 feet and whose altitude is 84⁄7 feet. A. 135⁄21 B. 20 C. 40 D. 2

CaHeK987 [17]

Answer:

Option B. $20\ ft^{2}$

Step-by-step explanation:

we know that

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$A=\frac{1}{2}bh$

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$h=8\frac{4}{7}\ ft$

Convert mixed numbers to an improper fractions

$b=4\frac{2}{3}\ ft=\frac{4*3+2}{3}=\frac{14}{3}\ ft$

$h=8\frac{4}{7}\ ft=\frac{8*7+4}{7}=\frac{60}{7}\ ft$

substitute the values

$A=\frac{1}{2}(\frac{14}{3})(\frac{60}{7})\\ \\A=\frac{14*60}{2*3*7}\\ \\A=\frac{840}{42} \\ \\A=20\ ft^{2}$

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2 years ago

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Please help me:) I don’t know what to do

Cloud [144]

Answer:

8 family members. Average of 2.6 fish per person.

Step-by-step explanation:

How many family members caught fish? Count only those members who caught at least 1 fish (that's all of them, because nobody caught 0 fish!).

3 + 1 + 0 + 4 = 8 family members.

Average number of fish caught per person. This is the total number of fish caught divided by the total number of people.

This is a little bit tricky because, for example, 4 people caught 4 fish, making 4 x 4 = 16 fish caught.

Multiply number of fish (column 1) by the number of people (column 2):

1 x 3 + 2 x 1 + 3 x 0 + 4 x 4 = 3 + 2 + 0 + 16 = 21 fish caught.

21 fish. 8 people. On average, that is 21 / 8 = 2.625 which rounds to 2.6 fish per person.

Hint: the word "per" means divide, so "fish per person" tells you to divide the total number of fish by the total number of people.

Good Luck!

5 0

1 year ago