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MissTica
3 years ago
12

How to do this problem

Mathematics
1 answer:
zhuklara [117]3 years ago
3 0

Answer:

What is the problem?

Step-by-step explanation:

Please upload.

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Do y’all the answer?
Strike441 [17]

Length = 12 m and width = \frac{7}{2} m.

Solution:

Let the width of the rectangle be w.

Length of the rectangle = 2w + 5

Area of the rectangle given = 42 m²

<em>Area of the rectangle = length × width</em>

length × width = 42

(2w + 5) × w = 42

2w^2+5w=42

Subtract 42 from both sides, we get

2w^2+5w-42=0

Using quadratic formula,

$x=\frac{-b \pm \sqrt{b^{2}-4 a c}}{2 a}

Here, a=2, b=5, c=-42

$w=\frac{-5 \pm \sqrt{5^{2}-4 \cdot 2(-42)}}{2 \cdot 2}

$w=\frac{-5 \pm \sqrt{25+336}}{4}

$w=\frac{-5 \pm \sqrt{361}}{4}

$w=\frac{-5 \pm19}{4}

$w=\frac{-5+19}{4}, w=\frac{-5-19}{4}

$w=\frac{14}{4}, w=\frac{-24}{4}

$w=\frac{7}{2}, w=-6

Dimension cannot be in negative, so neglect w = –6.

Width of the rectangle = \frac{7}{2} m

$L=2(\frac{7}{2} )+5=12 \  m

Hence length = 12 m and width = \frac{7}{2} m.

4 0
3 years ago
Taylor had a bag of 28 marbles. 5 red, 9 blue, 8 yellow, and 6 black. If Taylor pulled out a yellow one and DID NOT put it back
Archy [21]

Answer: 1/3

Step-by-step explanation:

Number of red marbles = 5

Number of blue marbles = 9

Number of yellow marbles = 8

Number of and black marbles = 6

Total number of marbles = 28

If Taylor pulled out a yellow one and didn't replce it, there'll be 27 marbles left since one has been removed, then the probability of picking blue marbles will be:

= Number of blue marbles / Total marbles

= 9 / 27

= 1/3

The probability of picking a blue marble is 1/3.

5 0
3 years ago
Wazi has sixty three 5 $ bills he takes the 5 $ bills to bank to exchange for 20$ how many 20$ bills does Wes I get
dmitriy555 [2]
15

63 x 5 = 315
315/20 = 15.75
hence, 15 $20 bills
4 0
3 years ago
In a trivia contest, players from teams and work together to earn as many points as possible for their team. Each team can have
seropon [69]

Answer:

The inequality for each quantity described is given as follows;

0 ≤ A + B + C + D + E ≤ 50

Step-by-step explanation:

The given information are;

The number of players each team can have = between 3 and 5

The maximum number of points a player can score in each round of the game = 10 points

The number of players in Elena's team = Elena + 4 = 5 players

The total number of points Elena's team earns at the end of the round is given as follows;

0 ≤ A + B + C + D + E ≤ 5 × 10

Where the variables A, B, C, D, and E are the points each of Elena and are  makes such that the minimum points is 0 + 0 + 0 + 0 + 0 = 0 and the maximum point is 10 + 10 + 10 + 10 + 10 = 5 × 10 = 50, which gives;

0 ≤ A + B + C + D + E ≤ 50.

8 0
3 years ago
Find the equation of a line that is parallel to the line -3x+2y=10 and goes through the point (0,7).
Delvig [45]

Answer:

  3x -2y = -14

Step-by-step explanation:

The parallel line will have a new constant that can be found by substituting the given point for x and y.

  -3x +2y = -3(0) +2(7) = 14

An equation for the parallel line is ...

  -3x +2y = 14

__

In standard form, the leading coefficient is positive, so the standard form equation is ...

  3x -2y = -14

6 0
3 years ago
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