All categories

3 years ago

Help plzzz....………………….…....................................

Mathematics

1 answer:

Nookie1986 [14]3 years ago

5 0

Answer:

Step-by-step explanation:

You automatically know that it is not A. The dot is filled in on the number line, so it must have a line under the inequality mark.

The number line says that x is greater than or equal to 2.5

Key:

gtoet means greater than or equal to

ltoet means less than or equal to.

3x + 2 gtoet 17

3x gtoet 15

x gtoet 5

This is incorrect. X is not gtoet 5.

12 + 4x gtoet 22

4x gtoet 10

x gtoet 2.5

This is correct. X is gtoet 2.5

-6x - 15 gtoet 0

-6x gtoet 15

(The sign switches in this one because you are dividing by a negative)

x ltoet 2.5

Incorrect. X is not ltoet 2.5

You might be interested in

When do we use d=(x2-x1)+(y2-y1)

stiks02 [169]

Answer:

to find the distance between two points on a coordinate plane

Step-by-step explanation:

yes

8 0

2 years ago

Y=x^2-2x-1 and y=-3x+5 solved algebraically

eduard

Answer:

Step-by-step explanation:

y=x²-2x-1

and y=-3x+5

x²-2x-1=-3x+5

x²+x-6=0

x²+3x-2x-6=0

x(x+3)-2(x+3)=0

(x+3)(x-2)=0

x=-3,2

when x=-3

y=-3×-3+5=9+5=14

when x=2

y=-3×2+5=-6+5=-1

so solutions are (-3,14) and (2,-1)

3 0

3 years ago

Solve for r and t:<br> 6r - 3t = 6<br> 6r + 8t = -16

MAVERICK [17]

Multiply the first equation with (-1)
you should get this

-6r + 3t = -6
6r + 8t = -16

start to eliminate

11t = -22

divide by 11

t = -2

substitute

6r - 3(-2) = 6
6r + 6 = 6
6r = 6 - 6
6r = 0
r=0

8 0

3 years ago

In ΔCDE, \overline{CE}

abruzzese [7]

Answer:

$m\angle CDE=14^o$

Step-by-step explanation:

we know that

An exterior angle of a triangle is equal to the sum of the opposite interior angles.

see the attached figure to better understand the problem

∠DEF=∠ECD+∠CDE

substitute the given values

$(4x+5)^o=(x+9)^o+(x+8)^o$

solve for x

Combine like terms

$(4x+5)^o=(2x+17)^o$

Group terms

$4x-2x=17-5$

$2x=12$

$x=6$

Find the measure of angle CDE

$m\angle CDE=(x+8)^o$

substitute the value of x

$m\angle CDE=(6+8)=14^o$

8 0

3 years ago

NO LINKS OR ANSWERING WHAT YOU DON'T KNOW?

snow_lady [41]

Answer:

1. D. 1

2. B. y=a³/x

3. A. y=1/x

Step-by-step explanation:

too long to give te explanations but they're there in the attachments

7 0

2 years ago