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3 years ago

Eight less than three times a number is less than ten. Find all such numbers.

Mathematics

1 answer:

Sindrei [870]3 years ago

4 0

Answer:

1, 2, 3, 4 & 5

Step-by-step explanation:

3x - 8 < 10

=> 3x < 18

=> x < 6

=> x = 1, 2, 3, 4 & 5

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Bezzdna [24]

Answer:

4.77*10^5<7.47*10^5

Step-by-step explanation:

4.77*10^5=477000

7.47*10^5=747000

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3 years ago

What is 6.7 x (-2.3) round to the nearest hundredth

Vaselesa [24]

Your answer would be -15.41. If you ever need any other kind of help, just ask me.

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3 years ago

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Answer: 7 1/2 pounds

Step-by-step explanation:

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3 years ago

If a student has an average exam score between 70 and 79, he will earn a grade of C in his algebra course. Suppose he has three

goldenfox [79]

Answer:

(64,86.5)

Step-by-step explanation:

find the case where he gets 70 and the case where he gets 79

if his average is 70:

(75+62+85+2x)/5=70

(222+2x)/5=70

222+2x=350

2x=128

x=64

if his average is 79:

(75+62+85+2x)/5=79

(222+2x)/5=79

222+2x=395

2x=173

x=86.5

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3 years ago

What is the area of a triangle with vertices (1,0) (5,0) (3,4)

Aleksandr-060686 [28]

Answer:

The area of the triangle is of 8 units of area.

Step-by-step explanation:

Answer:

The area of the triangle is of 21 units of area.

Step-by-step explanation:

The area of a triangle with three vertices $(x_1,y_1),(x_2,y_2),(x_3,y_3)$ is given by the determinant of the following matrix:

$A = \pm 0.5 \left|\begin{array}{ccc}x_1&y_1&1\\x_2&y_2&1\\1_3&y_3&1\end{array}\right|$

In this question:

Vertices (1,0) (5,0) (3,4). So

$A = \pm 0.5 \left|\begin{array}{ccc}1&0&1\\5&0&1\\3&4&1\end{array}\right|$

$A = \pm 0.5(1*0*1+0*1*3+1*5*4-1*0*3-0*5*1-1*1*4)$

$A = \pm 0.5*(20-4)$

$A = \pm 0.5*16 = 8$

The area of the triangle is of 8 units of area.

3 0

3 years ago