Someone Help me solve these by substitution please !

Answer:

6  ≥ 4 + x

Step-by-step explanation:

it wouldn't be any of those

Answer:

$33.75

Step-by-step explanation:

First, find the cost for each door. 3 hinges times $0.75 a hinge, that's $2.25 per door. Then, multiple that by 15, for each door. That comes out to $33.75.

Answer:

the answer is 1.

Answer:

0.18

Step-by-step explanation:

Answer:

d=8

r=d/2

r=4

a=πr^2

=22/7×4×4

=50.28

Answer:

[tex]y= 8x - 17[/tex]

Step-by-step explanation:

to find the y-intercept plug 8 and (2, -1) into [tex]y=mx +b[/tex]

[tex]y= mx+b[/tex]

[tex]-1= 8(2)+b[/tex]

[tex]-1= 16+b\\ -16= -16[/tex]

[tex]-17=b[/tex]

Step-by-step explanation:

2(3x-7)=4

6x - 14 = 4

add 14 to both sides

6x = 18

divide by 6

x = 3

Answer:

Step-by-step explanation:

if the angles form a linear pair, that means their sum=180

10x-63+8x=180

18x=180+63

x=243/18=13.5  choice c

Answer:

a. 0.133 pushups/s b. 8 pushups/s c. 1200 pushups/s

Step-by-step explanation:

To write the rate in 3 different ways, we have to use seconds, minutes and hours respectively for the time.

So, a. Number of pushups per second

rate, R₁ = number of pushups per second

= number of pushups/ total time in seconds

= 40 pushups/(5 × 60) s

= 40 pushups/300 s

= 0.133 pushups/s

b. Number of pushups per minute

rate, R₂ = number of pushups per minute

= number of pushups/ total time in minutes

= 40 pushups/5 min

= 8 pushups/s  

c. Number of pushups per hour

rate, R₃ = number of pushups per hour

= number of pushups/ total time in seconds

= 40 pushups/(5 ÷ 60) s

= 40 pushups/(1/30) h

= 40 × 30 pushups/s

= 1200 pushups/s

Answer:

Not equivalent

Step-by-step explanation:

They are not equivalent because if you multiply both sides of the ratio 8 : 7, you get 16 : 14. This is not equivalent to 15 : 14.

Hope this helped! :)

No, The given ratios are not equivalent.

A ratio indicates how many times one number contain in another number. The ratio of two number is written as x : y, which is equivalent to x/y. Where, x and y are individual amount of two quantities. And, Total quantity gives after combine as x + y.

Given that;

The ratios are,

⇒ 8 : 7 and 15 : 14

Now,

Since, The ratios are,

⇒ 8 : 7 and 15 : 14

Hence, From first ratio,

⇒ 8 : 7 = 8 / 7

           = 8×2/7×2

           = 16 / 14

           ≠ 15/14

Thus, Both ratio are not equivalent.

Learn more about the ratio visit:

https://brainly.com/question/12024093

#SPJ2

Answer:

11

it's is an icoceles triangle because base angles are equal i.e. 45°

Answer:

just took the test

Step-by-step explanation:

Step-by-step explanation:

Lets FOIL it out:

6+4i+3bi+2bi²=13i

6-4i-13i+3bi+2bi²=0

6-9i+3bi+2bi²=0,but i²=-1

3bi-2b=9i-6

b(3i-2)=9i-6

Divide both sides by (3i-2)

b=(9i-6)/(3i-2)

Rationalize the expression by multiplying through by the conjugate of (3i-2) which is (3i+2)

b=(27i²+18i-18i-12)/(9i²+6i-6i-4),again i²=-1

b=27i²-12/9i²-4

b=-27-12/-9-4

b=-39/-13

b=3

Answer:

Step-by-step explanation:

-2 -5

got it right on edge

Answer:

14:30 or 14/30

Step-by-step explanation:

Answer:

kkffkyeurkyerkurkurumeukulruor

Answer:

10 lbs

Step-by-step explanation:

Answer:

I think that it's +2, but seeing as I don't know what type of formula you need (several ways depending on what you are learning, solving for x, solving quadratic, etc?)

Step-by-step explanation:

Answer:

(-8,7)

Step-by-step explanation:

Answer:

[tex]18x^3y[/tex]

Step-by-step explanation:

The area of a trapezium is [tex]\frac{a+b}{2}h[/tex] (where [tex]a,b[/tex] are the parallel sides and [tex]h[/tex] is the perpendicular height)

Area of trapezoid [tex]= \frac{4xy+8xy}{2}3x^2[/tex]

[tex]=6xy(3x^2)[/tex]

[tex]=18x^3y[/tex]

∴ The area of the trapezoid is [tex]18x^3y[/tex]

Hope this helps :)

Answer:

a) 3 cm

b) 140 cm²

General Formulas and Concepts:

Pre-Algebra

Order of Operations: BPEMDAS

Equality Properties

Geometry

Step-by-step explanation:

Step 1: Define

C = 21 cm

Step 2: Find Radius r

Step 3: Find Surface Area

Answer:

15x²y + 21xy²

Step-by-step explanation:

Given

3xy(5x + 7y) ← distribute by 3xy

= 15x²y + 21xy²

Answer:

15x^2+21x^21x

is your ans I hope it helps mate

#Captainpower:)

have a great day

Answer:

i have. no idea lmaao

Step-by-step explanation:

Answer:

circumference

Step-by-step explanation:

Star 9,6

Lightning 6,10

Circle 2,9

Heart 9,4

Cross 3,2

Triangle 2,6

Moon 2,3

Square 6,8

Dimond 1,8

Music Note 5,7

Answer:

You should divide both sides by 4

Step-by-step explanation:

Answer:

71.33

Step-by-step explanation:

Use SohCahToa to figure this out. I used sin because I had the opposite and hypotenuse. Divide 36 by 38 and get 0.94737 after that find the sin^-1 of 0.94737

sin(?) = 36/38

so

? = sin⁻¹(36/38) ≈ 71.3°

Answer:

7 meters

Step-by-step explanation:

circumference of path=88m

⇒2πr=88

⇒2.  

7

22

​  

.r=88

⇒r=14m

circumference of plot=44m

⇒2πr  

′

=44

⇒2.  

7

22

​  

.r  

′

=44

⇒r  

′

=7m

therefore width of path=r−r  

′

=14−7

=7m

Answer:

-19/18 or  -1 1/18 or -1.055

Step-by-step explanation:

All same answer, just which ever you choose

Answer:

-19/18

Step-by-step explanation:

Answer:

the correct answer is 8/9

Answer:

c. divide both sides by 6

Step-by-step explanation:

6x= -12

6x/6= -12/6

x = -2