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3 years ago

Which expression is equivalent to -4(w-1)4w-44w-4w+4 -5wNone of the above

Mathematics

2 answers:

aliina [53]3 years ago

6 0

Answer:

-4w+4 Is te correct answer

dimulka [17.4K]3 years ago

5 0

Answer:

-4w+4

Step-by-step explanation:

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If an arrow is shot upward on Mars with a speed of 56 m/s, its height in meters t seconds later is given by y = 56t − 1.86t2.

Zina [86]

Answer: (a) (i)50.42 m/s (ii) 51.35 m/s (iii) 52.094 m/s (iv) 52.2614 m/s (v) 52.27814 m/s

(b) 54.14 m/s

Step-by-step explanation:

The average speed over the given time interval [a,b]: = $\frac{y(b)-y(a)}{b-a}$

Given: If an arrow is shot upward on Mars with a speed of 56 m/s, its height in meters t seconds later is given by $y = 56t − 1.86t^2.$

(a)

(i) average speed = $\frac{y(2)-y(1)}{2-1}$

$=\frac{56(2)-1.86(2)^2-(56(1)-1.86(1)^2)}{1}$

$=50.42$ m/s

(ii) average speed = $\frac{y(1.5)-y(1)}{1.5-1}$

$=\frac{56(1.5)-1.86(1.5)^2-(56(1)-1.86(1)^2)}{0.5}$

$=51.35$ m/s

(iii) average speed = $\frac{y(1.1)-y(1)}{1.1-1}$

$=\frac{56(1.1)-1.86(1.1)^2-(56(1)-1.86(1)^2)}{0.1}$

$=52.094$ m/s

(iv) average speed = $\frac{y(1.01)-y(1)}{1.01-01}$

$=\frac{56(1.01)-1.86(1.01)^2-(56(1)-1.86(1)^2)}{0.01}$

$=52.2614
$ m/s

(v) average speed = $\frac{y(1.001)-y(1)}{1.001-01}$

$=\frac{56(1.001)-1.86(1.001)^2-(56(1)-1.86(1)^2)}{0.001}$

$=52.27814
$ m/s

(b) $y(1)=56(1)-1.86(1)^2$

$=56-1.86$

$= 54.14$ m/s

3 0

3 years ago

The ratio of yellow to red flowers are 4:7 how many red flowers are there if there is 8 flowers

hram777 [196]

Ratio 4:7
If there are 8 red then number of yellow, y = 8 ×7/4=14

6 0

3 years ago

A map has a scale of 1.5 in : 26 mi. If the distance between city A and City

alekssr [168]

Answer:

The real distance is 260 miles

Step-by-step explanation:

From the question;

1.5 inches in map is 26 miles

Thus;

15 inches will be x miles

To get the value of x, we do a cross-multiplication

we have this as:

15 * 26 = 1.5 * x

x = (15 * 26)/1.5

x = 10 * 26 = 260 miles

6 0

3 years ago

The cost of 8 pounds of watermelon is $19.60. How many pounds of watermelon can a

umka21 [38]

Answer:

22 pounds of watermelon

Step-by-step explanation:

First find cost per pound
19.60/8=2.45
$2.45 per pound
Then divide $53.90 by $2.45 to determine how many pounds you can buy
53.90/2.45=22
22 pounds of watermelon

3 0

2 years ago

There are two similar triangles on the graph below use the graph to answer the questions you must answer each question and expla

Alona [7]

Answer:

we can use similarity of triangles in this case there will be formation of 2 pairs of equal (eg:-angle formed by the y- axis on the parallel lines) angles between triangles formed as the y- axis lines are parallel. So,slope of the graph between points A and B is the same as the slope of the graph between points A and B.

Step-by-step explanation:

6 0

3 years ago