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3 years ago

I didn't get them all right. Can someone help please?

Mathematics

1 answer:

Tomtit [17]3 years ago

7 0

Answer:

$\sqrt{2.56}$

$6.828...$

$1.75$

$14/3$

$-40$

Step-by-step explanation:

A rational number is any number that can be expressed as a ratio.

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Ten children in a kindergarten class own a dog. Fourteen children in the class do not own a dog. Find the ratio of the number of

Bond [772]

5/7 which means for every 7 kids, one owns a dog

3 0

3 years ago

Machine at a manufacturing plant can make 16 of item A per hour or 20 of item B per hour. The machine runs for 24 hours a day. Y

irina [24]

Answer:

A + B = 24

16A + 20B = 434

Step-by-step explanation:

To write a system of equations for this scenario, let's say that A represents the number of hours machine A ran, and B represents the number of hours machine B ran.

The first equation will be:

A + B = 24

because the total number of hours ran is 24.

The second equation will be:

16A + 20B = 434

because the total number of items made is 434.

A + B = 24

16A + 20B = 434

First solve for one variable, and let's just do A.

Using the first equation, A + B = 24, A is equal to 24 - B.

Substitute this value to the second equation.

16 (24 - B) + 20B = 434

384 - 16B + 20B = 434

4B = 50

B = 12.5

Now use this value of B to find the value of A.

A + 12.5 = 24

A = 11.5

Machine A ran for 11.5 hours, and Machine B ran for 12 hours.

6 0

3 years ago

Factor the polynomial.

Iteru [2.4K]

3x4+6x3+9x2
Factored: (3x2)(x2+2x+3)

Answer:
C) 3x2(x2+2x+3)

Hope this helps! :)

7 0

3 years ago

Read 2 more answers

In triangle ABC, AB = 90 in., BC = 80 in., and angle B measures 50°. What is the approximate perimeter of the triangle?

Monica [59]

Answer:

The answer to your question is Perimeter = 287.3 in

Step-by-step explanation:

AB = 90 in

BC = 80 in

∠B = 50

Perimeter = ?

Process

1.- We need to find AC using Law of sines

$\frac{sin A}{80} = \frac{sin 50}{90}$

$sin A = \frac{80}{90} sin 50$

$sin A = 0.68$

A = 42.9 ≈ 43

The sum of the internal angles in a triangle equals 180°

A + B + C = 180°

43 + B + 50 = 180

B = 180 - 43 - 50

B = 87°

$\frac{AC}{Sin 87} = \frac{90}{sin 50}$

$AC = 90 \frac{sin 87}{sin 50}$

AC = 117.3

2.- Find the perimeter

Perimeter = AB + BC + AC

Perimeter = 90 + 80 + 117.3

Perimeter = 287.3 in

5 0

3 years ago

Read 2 more answers

A rectangle. one side is 2x + 7 and the other is x+3

saveliy_v [14]

$\large{\green}\fcolorbox{purple}{pink}{\bf{\underline{\red{\color{red}Answer}}}}$

6x + 20

Step-by-step explanation:

To find :-

Perimeter of rectangle

Given :-

Length = 2x + 7

Breadth/width = x + 3

Solution :-

We know that

$\mathfrak {perimeter \: of \: rectangle =2(length + breadth) }$

Now we will substitute the values of length and breadth

$\sf \longmapsto perimeter = 2 \{(2x + 7) + (x + 3) \} \\ \\ \\ \sf \longmapsto perimeter = 2 \{3x + 10 \} \\ \\ \\ \sf \longmapsto perimeter = 6x + 20$

6 0

2 years ago