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Black_prince [1.1K]
3 years ago
6

How To Solve these? ​

Mathematics
1 answer:
Inessa [10]3 years ago
5 0

Answer:

a. 15/23

b. 13/27

c. 400g

Step-by-step explanation:

a. When the denominators are the same, you can just sum the numerators.

Which becomes, 13+2=15--> 15/23

b. Same, when the denominator is the same, you can just minus the numerators. Which becomes, 25-12=13--> 13/27

c. 1kg=1000g. 1000/5=200✖️2=400

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Lelu [443]

Answer:

The inequality f>40 represents the length of the femur for which the woman had a height greater than 160cm.

Step-by-step explanation:

The given equation is

h=60+2.5f

Where, h is woman's height in centimeters and f is length of the femur in centimeters.

If woman's height is greater than 160cm, then

h>160

60+2.5f>160

Substract 60 from both sides.

2.5f>100

Divide both sides by 2.5.

f>40

Therefore the inequality  f>40 represents the lengths of the femur for which the woman had a height greater than 160cm.

5 0
3 years ago
No links or wrong answers please!! 55 points
juin [17]

The areas of the figures are 4(x + 1), 7(d + 4) and y(y + 3)

<h3>How to determine the total areas?</h3>

<u>The figure 1</u>

In this figure, we have

Length = x + 1

Width = 4

The area is calculated as:

Area = Length * Width

So, we have

Area = 4(x + 1)

<u>The figure 2</u>

In this figure, we have

Length = d + 4

Width = 7

The area is calculated as:

Area = Length * Width

So, we have

Area = 7(d + 4)

<u>The figure 3</u>

In this figure, we have

Length = y + 3

Width = y

The area is calculated as:

Area = Length * Width

So, we have

Area = y(y + 3)

Hence, the areas of the figures are 4(x + 1), 7(d + 4) and y(y + 3)

Read more about areas at:

brainly.com/question/24487155

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4 0
1 year ago
What is the value of the discriminant of the quadratic equation −1 = 5x2 −2x, and what does its value mean about the number of r
Zepler [3.9K]
For the equation:
-1=5 x^2 - 2 x
5 x^2 - 2 x + 1 = 0,           then we substitute: a=5,  b=-2,  c =1
to discriminant formula: D= b^2 - 4 a c = (-2)^2 - 4 * 5 * 1 = 4 - 20 = - 16
Answer:
The discriminant is equal to -16 which means the equation has no real number solutions. 
7 0
3 years ago
Read 2 more answers
Francisco is making an effort to drink more water, and has set a goal of 222 liters per day. He wants to know the volume of the
OlgaM077 [116]

V = 1,005.7 rounded off to one decimal place

Because:

Volume of a cylinder = πr²h

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V = 1,005.7

3 0
3 years ago
If u = -8i + 7j, what is the magnitude of -5u? Simplify any radicals.​
lubasha [3.4K]

Answer:

- 5 \sqrt{113}

Step-by-step explanation:

Find the magnitude of the complex number

Notice the magnitude is equal to

u = \sqrt{ {a}^{2}  +  {b}^{2} }

where a is the real number and b is the imaginary number.

Substitute

u =  \sqrt{ - 8 {}^{2}  + 7 {}^{2} }

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u =  \sqrt{113}

Multiply this by -5

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7 0
2 years ago
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