Combine like terms pls

Answer:

x=5

Step-by-step explanation:

7x - 4y = 23 and x + y = 8

Multiply the second equation by 4

4x + 4y = 32

Add this to the first equation

7x - 4y = 23

4x + 4y = 32

------------------------

11x    = 55

Divide each side by 11

11x/11 = 55/11

x = 5

Answer:

[tex]\huge\boxed{x=5}[/tex]

Step-by-step explanation:

[tex]\left\{\begin{array}{ccc}7x-4y=23\\x+y=8&|\text{subtract}\ x\ \text{from both sides}\end{array}\right\\\left\{\begin{array}{ccc}7x-4y=23&(1)\\y=8-x&(2)\end{array}\right\\\\\text{substitute (2) to (1):}\\\\7x-4(8-x)=23\qquad|\text{use the distributive property}\\\\7x+(-4)(8)+(-4)(-x)=23\\\\7x-32+4x=23\qquad|\text{combine like terms}\\\\(7x+4x)-32=23\qquad|\text{add 32 to both sides}\\\\11x-32+32=23+32\\\\11x=55\qquad|\text{divide both sides by 11}\\\\\dfrac{11x}{11}=\dfrac{55}{11}\\\\x=5[/tex]

Answer:

WHEN YOU COMPARE THE TEMPERATURE ON MONDAY TO THE TEMPERATURE ON TUESDAY, THE TEMPERATURE ON TUESDAY IS COLDER.

Answer:

Hi, there the answer C because in the inequality there is a line underneath it means the dot has to be closed

Step-by-step explanation:

Answer:

2nd one

Step-by-step explanation:

Answer:

y = 13

Step-by-step explanation:

y = 3x + 2

y = - 3 ( 5 ) + 2 ( given :- x = 5)

y = - 15 + 2

y = 13

Answer:

-13

Step-by-step explanation:

y=-3x+2

Let x = 5

y=-3*5+2

  = -15+2

   = -13

Answer:

w = 5.2

Step-by-step explanation:

4(2.25w + 3.1) - 2.75w = 44.9

9w + 12.4 - 2.75w = 44.9

6.25w + 12.4 = 44.9

6.25w = 32.5

w = 5.2

4(2.25w+3.1)-2.75w=44.9

9w+12.4-2.75w=44.9

9w-2.75w+12.4=44.9

44.9-12.4=32.5

9w-2.75w=32.5

6.3w/6.3=32.5/6.3

=5 10/63

Answer:

well it's technically 23.66, but I guess you can round it up to 24

that's the answer

Step-by-step explanation:

[tex]slope = \frac{y2 - y1}{x2 - x1} \\ = \frac{3 - - 5}{ - 9 - - 3} = \frac{8}{ - 6} \\ \frac{y - 3}{x - - 9} = \frac{8}{ - 6} \\ - 6(y - 3) = 8(x - - 9) \\ - 6y + 18 = 8x + 72 \\ - 6y = 8x + 72 -18 \\ - 6y = 8x + 54 \\ \frac{ - 6y}{ - 6} = \frac{8x}{ - 6} + \frac{54}{ - 6} \\ y = \frac{8x}{ - 6} - 9 [/tex]

Step-by-step explanation:

I think it is either 28⅛ or 60

Answer:

8:6

Step-by-step explanation:

If 8 out of 14 students are boys then the remaining number of students must be girls

So

14-8= 6

There are 6 girls out of the 14

So as a ratio of boys to girls

8:6

Answer:

8 : 6 <or> 4 : 3

Step-by-step explanation:

8 : 6 <or> 4 : 3

Since there are 8 boys out of 14, if you minus them , the answer will be the number of girls out of 14.

Answer:

-5, -3

Step-by-step explanation:

===================================================

Work Shown:

A = probability of landing on an odd number

A = 5/9 because there are 5 odd numbers out of 9 total

B = probability of getting heads

B = 1/2

C = landing on 3 on the spinner

C = 1/9

Multiply the values of A,B,C

A*B*C = (5/9)*(1/2)*(1/9) = (5*1*1)/(9*2*9) = 5/162

Note: The fraction 5/162 converts to the approximate decimal 0.03086 which then converts to 3.086%, when rounding to the nearest tenth of a percent we get 3.1%

Answer:

1, 2, 3

Step-by-step explanation:

Answer:

9 !!

Step-by-step explanation:

Hope this helps! <3

Answer:

1.8 hours

hope that helps<3

Answer:

1.8 hours is the answer

Answer:

Hong 12 bill 7

Step-by-step explanation:

answer is in photo above

Answer:

option 3

Step-by-step explanation:

[tex]Formula : a^{-x} = \frac{1}{a^x}[/tex]

[tex]3^7 \times 3^{-4} = 3^7 \times \frac{1}{3^4}[/tex]

Answer:

10 + 7z

Step-by-step explanation:

the product of z and 7 is

7z

adding 10 to the expression would be

10 + 7z

The required expression is the binomial 7z+10

Polynomial is made up of two terms, namely Poly (meaning “many”) and Nominal (meaning “terms.”). A polynomial is an expression composed of variables, constants, and exponents, combined using mathematical operations such as addition, subtraction, multiplication, and division (No division operation by a variable). Based on the number of terms present in the expression, it is classified as monomial, binomial, and trinomial. For example P(x) = x2-5x+11

Given here: The statement " Product of z and 7 added to 10"

Now the product of z and 7 is given by 7z

Now adding 10 to the monomial we get

7z+10

Thus the result is a binomial

Hence, The required expression is the binomial 7z+10

Learn more about the polynomial expression here:

https://brainly.com/question/11536910

#SPJ2

Answer:

1 / 2 or 0.5

Step-by-step explanation:

use the formula ; m = y2 - y1 / x2 - x1

where y2 = 10

y1 = 9

x2 = 5

x1 = 3

Answer:

El costo total es 4 $.

Step-by-step explanation:

Sabemos que el metro de alambre grueso cuesta 4 pesos y el metro de alambre delgado cuesta 5 pesos.

Entonces:

Costo de alambre grueso

[tex]0.5\: m*4\frac{\$}{m}=2\: $[/tex]

Costo de alambre delgado

[tex]0.4\: m*5\frac{\$}{m}=2\: $[/tex]

Por lo tanto, el costo total es 4 $.

Espero te haya sido de ayuda!

Answer:

c

Step-by-step explanation:

m=28g

m=28(20)

m=560

Answer:

All are true

Step-by-step explanation:

You’re welcome

Answer:

if this was a equation you would first subtract 12 from the other number then divide it by 3

Answer:

3(x+4)

Step-by-step explanation:

Check 3(x+4), when you use the distributive property, you get 3x + 12, so this is correct. (sorry, I'm really bad at explaining...)

Answer:

dont know you know

Step-by-step explanation:

maybe try ask some one else i dont know

Answer:

The event of rolling a multiple of two occurs three times: rolling a two, four, or six.

Step-by-step explanation:

Plato/edmentum sample answer

9514 1404 393

Answer:

  C.  y = 10x

Step-by-step explanation:

Two points are marked on the graph of Bike B. One of them is ...

  (time, distance) = (x, y) = (6, 60)

It should be pretty easy to see that the value of y is 10 times the value of x. This is represented in the equation ...

  y = 10x

Answer:

140 trees

Step-by-step explanation:

Number of trees planted on one side of the road = length of the road / intervals

1000m = 1km

0.28 x 1000 = 280m

280 / 4 = 70

number of trees planted on both sides of the roads = 70 x 2 = 140 trees

Answer:

B. 3 gallons

Step-by-step explanation:

If two gallons cover 800, divide in half to get one gallon. One gallon would be 400. 400 goes into 1200 three times, so thats how many gallons you need.