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3 years ago

Can anyone help me with my homework

Mathematics

1 answer:

aleksley [76]3 years ago

7 0

Answer:

x = the number

Step-by-step explanation:

15.) 2x + 9 = 25

16.) 3x - 6 = 21

17.) 7x = 12 + 3x

18.) 4x = 18 + x

19.) 2x + 24 = 8x

20.) 30 - x = 4x

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Solve for x.<br><br> −4/5x+3/10<8/10

Genrish500 [490]

Answer:

for (−4/5)x + 3/10 < 8/10: solution is x > -5/8

for −4/(5x) + 3/10 < 8/10: solution is x > -8/5

Step-by-step explanation:

I'm not exactly sure if you mean -4 divided by 5x or (-4/5)x, so I've done both! :)

$-\frac{4}{5}x+ \frac{3}{10} < \frac{8}{10}$

subtract 3/10 from both sides: $-\frac{4}{5}x < \frac{5}{10}$

Divide both sides by 4/5: $-x < \frac{5}{8}$

Divide both sides by -1 (reverse sign): $x > -\frac{5}{8}$

$-\frac{4}{5x}+ \frac{3}{10} < \frac{8}{10}$

subtract 3/10 from both sides: $-\frac{4}{5x} < \frac{5}{10}$

Multiply both sides by 5x: $-4 < \frac{5}{2}x$

Divide both sides by 5/2: $x>- \frac{8}{5}$

6 0

2 years ago

Read 2 more answers

Determine which consecutive integers do not have a real zero of f(x) = x^3+5x^2 -x -6 between them.

Verdich [7]

Answer:

(-6, -5).

Step-by-step explanation:

If there is a zero between the integers there will be a change of sign of f(x).

x^3 + 5x^2 - x - 6

f(1) = 1 + 5 - 1 - 6 = -1

f(-1) = -1 + 5 + 1 - 6 = -1

f(2) = 8 + 20 - 2 -6 = 20

There' a change of sign between f(1) and f(2) so there is a zero between (1, 2).

f(-2) = -8 + 20 + 2 - 6= 6

So there is also a zero between -1 and -2. (-2, -1)

F(-4) = 14, f(-5) = -1 = change of sign so there is also a zero in (-5,-4)

f(-6) = -36 - no change in sign between -5 and -6.

7 0

3 years ago

Directions: Type the correct answer in each box. Use numerals instead of words. If necessary, use / for the fraction bar(s).. Th

Anuta_ua [19.1K]

Answer

Find out the The numerical value of A - B and the numerical value of B - A .

To prove

As given

The expression 113.47 - (43.72 - 26.9) represents A.

The expression 113.47 - (26.9 - 43.72) represents B .

Thus

A - B = 113.47 - (43.72 - 26.9) - ( 113.47 - (26.9 - 43.72))

First solving the bracket terms.

A - B = 113.47 - (43.72 - 26.9) - 113.47 + (26.9 - 43.72)

= 113.47 - 16.82 - 113.47 - 16.82

= 113.47 - 113.47 - 16.82 - 16.82

= -33.64

Therefore the value of A- B is -33.64 .

Thus

B - A = 113.47 - (26.9 - 43.72) - (113.47 - (43.72 - 26.9))

First solving the bracket terms.

B - A = 113.47 - (26.9 - 43.72) - 113.47 + (43.72 - 26.9)

= 113.47 + 16.82 - 113.47 + 16.82

= 33.64

Therefore the value of the A - B is -33.64 and B - A is 33.64 .

6 0

3 years ago

Read 2 more answers

1. The perimeter of a rectangular garden is 690 ft. The short sides are each 55 ft. long. What's the length the other 2 sides? W

Nikolay [14]

1) C
2) I don't understand the question<span />

8 0

3 years ago

Brainliest, hurry! Thank you so much! :D

Free_Kalibri [48]

Answer: 20/4.

Step-by-step explanation: As we can see, the number line is cut up into fourths. 4 fourths make a whole, so 20 fourths make 5. Therefore, 5 in a fractional form for this number line is 20/4.

Have a great day! :)

5 0

2 years ago

Read 2 more answers