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3 years ago

In a class of 25 students, 15 of them have a cat,

Mathematics

1 answer:

igor_vitrenko [27]3 years ago

7 0

Answer: 9/25

Step-by-step explanation:

Since 3 of them have neither a cat or a dog, that means 22 (25-3) of them have a dog, a cat, or both.

16 + 15 = 31, which is 9 more than 22. That means 9 of them have both a dog and a cat.

Out of the 25 people, 9 have both a cat and dog, which means the probablity a student chosen at random has both is 9/25.

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What is the value of x???

damaskus [11]

X equals five. hope this helps, and have a very brainly day!

3 0

4 years ago

The real estate term lake frontage refers to the distance along the edge of a piece of property that touches a lake.

nataly862011 [7]

Answer:

The lake frontage of lot A is 50.9yd

The lake frontage of lot B is 58.4yd

The lake frontage of lot C is 64.7yd

d) The prices of the other lots, from least to greatest, are 286,836.94 and 317,779.96

Step-by-step explanation:

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3 years ago

Solve the system of equations by the substitution method.

marishachu [46]

Answer:

B. There is no solution.

General Formulas and Concepts:

Pre-Algebra

Order of Operations: BPEMDAS

Brackets
Parenthesis
Exponents
Multiplication
Division
Addition
Subtraction

Left to Right

Equality Properties

Algebra I

Solving systems of equations using substitution/elimination
Solving systems of equations by graphing

Step-by-step explanation:

Step 1: Define systems

y = x + 9x + 5

y = -x + 11x + 29

Step 2: Simplify systems

y = 10x + 5

y = 10x + 29

Step 3: Solve for x

Substitution

Substitute in y: 10x + 5 = 10x + 29
Subtract 10x on both sides: 5 ≠ 29

Here we see that 5 does not equal 29.

∴ The systems has no solutions.

Step 4: Graph systems

Check the solution set (if applicable).

We see that the 2 lines are parallel and will never intersect. Therefore, this proves that our systems has no solution.

5 0

3 years ago

The length of a rectangle is 5 m greater than the width. The perimeter is 150 m. find the width

Elza [17]

P = perimeter

Perimeter of a rectangle = l + l + w + w

or P = 2l + 2w

You know:

P = 150 m

l = w + 5 [length is 5 m greater than the width]

P = 2l + 2w Plug in what you know

150 = 2(w + 5) + 2w Simplify, distribute/multiply 2 into (w + 5)

150 = 2w + 10 + 2w

150 = 4w + 10 Subtract 10 to both sides of the equation

140 = 4w Divide 4 on both sides

35 = w

PROOF l = w + 5 ---> l = 40

P = 2l + 2w

150 = 2(40) + 2(35)

150 = 80 + 70

150 = 150

4 0

4 years ago

(8x to the second power plus 17x)+6xto the second power

Phoenix [80]

$8x^2+17x+6x^2=14x^2+17x$

3 0

3 years ago