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Gre4nikov [31]
2 years ago
7

Solve [y] = -18. Help pls

Mathematics
2 answers:
Natalka [10]2 years ago
8 0

Answer: hm shouldn’t that just be -18?

Step-by-step explanation:

777dan777 [17]2 years ago
7 0

Answer:

[y]=-18 so y belongs to (-18,-17)

Step-by-step explanation:

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Solve the inequality.
borishaifa [10]
2>8-4h/3  subtract 8 from both sides

-6>-4h/3  multiply both sides by 3

-18>-4h  divide both sides by -4 (and reverse sign because of division by a negative value)

4.5<h or by convention...

h>4.5
8 0
3 years ago
The area of a rectangle is 56 cm. The length is 2cm more than x and width is 5 cm less than twice x. Solve for x. Round to the n
ra1l [238]
Area = Length * Width = l * w
l = x + 2
w = 2x - 5
Area = (x + 2)(2x - 5) = 56
Area = 2x^2 -x  - 10 = 56
Area = 2x^2 - x - 66 = 0 Now you have to factor this thing.
Area = (2x + 11)( x - 6) = 0 This is more or less done by guessing. 
2x + 11 = 0 can't work. x would be negative.
x - 6 = 0
x = 6.

Check
=====
l = x + 2
l = 6 + 2
l = 8

w = 2*x - 5
w = 2*6 - 5
w = 12 - 5
w = 7

l*w = 8*7 = 56. It checks.
If this is the best answer you get, could you consider a Brainly? I need 2 of them to move up.
3 0
3 years ago
There were 100 questions on a math test. If Jamal got 4 times as many right as he got wrong, what was Jamals score?
IgorLugansk [536]

Jamal's score is 80

<u>Explanation:</u>

Given:

Number of questions = 100

Let w be the number of wrong answers

Let r be the number of right answers

According to question,

r = 4w

r + w = 100

Solving both the equations we get:

4w + w = 100

5w = 100

w = 20

If w = 20 then r = 4 X 20 = 80

Therefore, Jamal's score is 80

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3 years ago
Hey can you plz help me with math work?
irinina [24]

Answer:

78.5 in ^2

Step-by-step explanation:

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A = 25π

= 78.5

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3 years ago
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