This is really hard for me can someone please help This gives me a headache trying to do it

Mathematics

1 answer:

Papessa [141]3 years ago

8 0

1. 3x-5<19
3x-5+5<19+5
3x<24
3x/3<24/3
x<8

2. -2x+12<-4
-2x+12-12<-4-12
-2x<-16
-2x/-2>-16/-2
x>8

3. Because the numbers are positive when divided.

4. The inequality sign is reversed because the 2nd to last step is divided by by a negative number. (This is also the same for multiplication)

5. -7d+8>29
-7d+8-8>29-8
-7d/7>21/-7
d>-3

6.12-3b<9
12-12-3b<9-12
-3b/-3>-3/-3
b>1

7.z/7-6=>-5
z/7-6+6=>-5+6
z/7*7=>1*7
z=>7 (what grade are you in?!)

You might be interested in

Hey! Last day for me to do Algebra before exams so this is an emergency!! Help would definitely be appreciated and do NOT answer

il63 [147K]

Part 1 -

1. f(x) = 5(x-2)^2 + 4

axis of symmetry: x = 2

vertex: (2, 4)

2. f(x) = 12(x + 6)^2 - 5

axis of symmetry: x = -6

vertex: (-6, -5)

3. f(x) = 2x^2 + 8x - 7

axis of symmetry: x = -2

vertex: (-2, -15)

I have to go somewhere right now, but I will get back to you as soon as I can (probably within a couple of hours) to finish answering the rest of your questions.

4 0

3 years ago

Y and X vary directly. If the constant of variation is 4,then what is the value of x when y=6?

jarptica [38.1K]

$\bf \qquad \qquad \textit{direct proportional variation} \\\\ \textit{\underline{y} varies directly with \underline{x}}\qquad \qquad y=kx\impliedby \begin{array}{llll} k=constant\ of\\ \qquad variation \end{array} \\\\[-0.35em] \rule{34em}{0.25pt}\\\\ k=4\qquad \boxed{y=4x}\qquad \qquad \textit{when y=6}~\hfill 6=4x\implies \cfrac{6}{4}=x\implies \cfrac{3}{2}=x$

6 0

3 years ago

you are working as an assistant to a chef the chef has 8 cups of berries and will us 2/3 cup of berries for each dessert he make

Anna11 [10]

To complete this question, all we have to do is divide the 8 cups of berries the chef has by the 2/3 cup of berries the chef will use to make each dessert. The equation we will use is as follows:

8 / $\frac{2}{3}$ = 12.