1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
sergiy2304 [10]
3 years ago
14

Which expressions are equivalent to -56z+28? Choose 2 answers:

Mathematics
2 answers:
nata0808 [166]3 years ago
4 0

Answer:

(-1.4z+0.7) x40 and (8z-4)(-7)

Step-by-step explanation:

Let's use the distributive property to expand each expression and see if it is equivalent to -56z+28−56z+28minus, 56, z, plus, 28.

Hint #22 / 7

Expression: \dfrac{1}{2}\cdot(-28z+14)  

2

1

​  

⋅(−28z+14)start fraction, 1, divided by, 2, end fraction, dot, left parenthesis, minus, 28, z, plus, 14, right parenthesis

Let's distribute the \blueD{\dfrac{1}{2}}  

2

1

​  

start color #11accd, start fraction, 1, divided by, 2, end fraction, end color #11accd to each of the terms inside of the parentheses.

\begin{aligned} \blueD{\dfrac{1}{2}}\cdot(-28z+14)&\stackrel{?}=-56z+28\\\\ \left(\blueD{\dfrac{1}{2}}\times-28z\right)+\left(\blueD{\dfrac{1}{2}}\times14\right)&\stackrel{?}=-56z+28\\\\ -14z+7&\neq -56z+28\end{aligned}  

2

1

​  

⋅(−28z+14)

(  

2

1

​  

×−28z)+(  

2

1

​  

×14)

−14z+7

​  

 

=

?

−56z+28

=

?

−56z+28



​  

=−56z+28

​  

 

No, \dfrac{1}{2}\cdot(-28z+14)  

2

1

​  

⋅(−28z+14)start fraction, 1, divided by, 2, end fraction, dot, left parenthesis, minus, 28, z, plus, 14, right parenthesis is not equivalent to -56z+28−56z+28minus, 56, z, plus, 28.

Hint #33 / 7

Expression: (-1.4z+0.7)\times40(−1.4z+0.7)×40left parenthesis, minus, 1, point, 4, z, plus, 0, point, 7, right parenthesis, times, 40

Let's distribute the \blueD{40}40start color #11accd, 40, end color #11accd to each of the terms inside of the parentheses.

\begin{aligned} (-1.4z+0.7)\times\blueD{40}&\stackrel{?}=-56z+28\\\\ \blueD{40}(-1.4z+0.7)&\stackrel{?}=-56z+28\\\\ (\blueD{40}\times-1.4z)+(\blueD{40}\times0.7)&\stackrel{?}=-56z+28\\\\ -56z+28&\stackrel{\checkmark}{=} -56z+28\end{aligned}  

(−1.4z+0.7)×40

40(−1.4z+0.7)

(40×−1.4z)+(40×0.7)

−56z+28

​  

 

=

?

−56z+28

=

?

−56z+28

=

?

−56z+28

=

✓

−56z+28

​  

 

Yes, (-1.4z+0.7)\times40(−1.4z+0.7)×40left parenthesis, minus, 1, point, 4, z, plus, 0, point, 7, right parenthesis, times, 40 is equivalent to -56z+28−56z+28minus, 56, z, plus, 28.

Hint #44 / 7

Expression: (14-7z)\cdot(-4)(14−7z)⋅(−4)left parenthesis, 14, minus, 7, z, right parenthesis, dot, left parenthesis, minus, 4, right parenthesis

Let's distribute the \blueD{-4}−4start color #11accd, minus, 4, end color #11accd to each of the terms inside of the parentheses.

\begin{aligned} (14-7z)\cdot(\blueD{-4})&\stackrel{?}=-56z+28\\\\ \blueD{-4}(14-7z)&\stackrel{?}=-56z+28\\\\ (\blueD{-4}\times14)+(\blueD{-4}\times-7z)&\stackrel{?}=-56z+28\\\\ -56+28z&\neq -56z+28\end{aligned}  

(14−7z)⋅(−4)

−4(14−7z)

(−4×14)+(−4×−7z)

−56+28z

​  

 

=

?

−56z+28

=

?

−56z+28

=

?

−56z+28



​  

=−56z+28

​  

 

No, (14-7z)\cdot(-4)(14−7z)⋅(−4)left parenthesis, 14, minus, 7, z, right parenthesis, dot, left parenthesis, minus, 4, right parenthesis is not equivalent to -56z+28−56z+28minus, 56, z, plus, 28.

Hint #55 / 7

Expression: (8z-4)(-7)(8z−4)(−7)left parenthesis, 8, z, minus, 4, right parenthesis, left parenthesis, minus, 7, right parenthesis

Let's distribute the \blueD{-7}−7start color #11accd, minus, 7, end color #11accd to each of the terms inside of the parentheses.

\begin{aligned} (8z-4)(\blueD{-7})&\stackrel{?}=-56z+28\\\\ \blueD{-7}(8z-4)&\stackrel{?}=-56z+28\\\\ (\blueD{-7}\times8z)+(\blueD{-7}\times-4)&\stackrel{?}=-56z+28\\\\ -56z+28&\stackrel{\checkmark}{=} -56z+28\end{aligned}  

(8z−4)(−7)

−7(8z−4)

(−7×8z)+(−7×−4)

−56z+28

​  

 

=

?

−56z+28

=

?

−56z+28

=

?

−56z+28

=

✓

−56z+28

​  

 

Yes, (8z-4)(-7)(8z−4)(−7)left parenthesis, 8, z, minus, 4, right parenthesis, left parenthesis, minus, 7, right parenthesis is equivalent to -56z+28−56z+28minus, 56, z, plus, 28.

Hint #66 / 7

Expression: -2(-28z-14)−2(−28z−14)minus, 2, left parenthesis, minus, 28, z, minus, 14, right parenthesis

Let's distribute the \blueD{-2}−2start color #11accd, minus, 2, end color #11accd to each of the terms inside of the parentheses.

\begin{aligned} \blueD{-2}(-28z-14)&\stackrel{?}=-56z+28\\\\ (\blueD{-2}\times-28z)+(\blueD{-2}\times-14)&\stackrel{?}=-56z+28\\\\ 56z+28&\neq -56z+28\end{aligned}  

−2(−28z−14)

(−2×−28z)+(−2×−14)

56z+28

​  

 

=

?

−56z+28

=

?

−56z+28



​  

=−56z+28

​  

 

No, -2(-28z-14)−2(−28z−14)minus, 2, left parenthesis, minus, 28, z, minus, 14, right parenthesis is not equivalent to -56z+28−56z+28minus, 56, z, plus, 28.

Hint #77 / 7

The following expressions are equivalent to -56z+28−56z+28minus, 56, z, plus, 28:

(-1.4z+0.7)\times40(−1.4z+0.7)×40left parenthesis, minus, 1, point, 4, z, plus, 0, point, 7, right parenthesis, times, 40

(8z-4)(-7)(8z−4)(−7)left parenthesis, 8, z, minus, 4, right parenthesis, left parenthesis, minus, 7, right parenthesis

gavmur [86]3 years ago
3 0

Answer:

(-1.4z+0.7) x 40 and (8z-4)(-7)

Step-by-step explanation:

You might be interested in
Can someone please help me I got this question wrong
lana66690 [7]

Answer: Answer is C, Associative and Distributive


Step-by-step explanation:

On step one to step two it shows that llz is added to 6z (Both have Z) and from step 2 to 3, 5 is distributed (Multiplied) by 17z which equals 85z and also Distributed (Multiplied) by 29 which gives you 145. Which makes final equation... 85z + 145

6 0
3 years ago
Read 2 more answers
Answer this please !
SpyIntel [72]

Answer:

6

Step-by-step explanation:

\frac{y}{2} =x^{2} -7

\frac{a}{2} =2^{2} -7

\frac{a}{2} =-3

a=-6

\frac{b}{2} =1^{2} -7

\frac{b}{2} =-6

b=-12

From the calculations above, we learn that line l and the curve intersect at (2, -6) and (1, -12). Next, we will set up a system of linear equations to solve for the slope and the y-intercept of line l.

-6=2m+b        

-12=m+b

-24=2m+2b

18=-b

b=-18

-12=m-18

m=6

Therefore, the slope of line l is 6.

3 0
1 year ago
Read 2 more answers
X+3=2X+6(x+4)<br> Please Answer!
nataly862011 [7]
X=10
-3 on both sides
Then -6(x+4)+3 to the other side
4 0
2 years ago
How much greater is the mass of Can A than Can B? cola cola B Con A: 20 grams Can B: 480 grams 360 grams 340 grams 240 grams 260
yarga [219]

Answer:

I would say 340 grams........

Step-by-step explanation:

340 grams

3 0
2 years ago
Pls help with Question 11.<br> I need to submit it by tmr
Wewaii [24]

Answer: 81.85 km/hr

Converting m/sec into km/hr, 25 m/sec = 90 km/hr

Average =

Time = 50/90  =  5/9 hr

next 120 km at an average speed of 80km/h

=> Time = 120/80  = 3/2  hr

last part of its journey at an average speed of 90km/h in 35 Minutes

time = 35 minutes = 35/60 hr = 7/12 hr

Distance covered = 90 * 7 /12  = 105/2  km

Total Distance = 50 + 120  + 105/2  = 435/2 km

Total time = 5/9 + 3/2 + 7/12   =  ( 20 + 54 + 21) /36  = 95/36

Average speed =   (435/2)/(95 /36)  = 432 * 18  /95 = 81.85 km/hr

8 0
3 years ago
Other questions:
  • If sin(theta°) = 0.5, and we know that cos (theta°) &lt; 0, then what is the smallest possible positive value of theta?
    15·1 answer
  • The cost of painting the circular traffic sign shown below is $3.50 per square foot. How much to the nearest dollar, will it cos
    9·1 answer
  • How to find the area of a triangle with given coordiantes? #5-50
    7·1 answer
  • Solve for r.<br> 7(r + 1) = 20.3
    5·2 answers
  • What's 15+15 imp bored I know<br> the answer just
    13·1 answer
  • Determine the solutions to the following equation.
    6·2 answers
  • Please!!!!!!!
    15·1 answer
  • Alexa has $300 in her bank account. Each week for 5 weeks she spends 18 dollars on things. How much money does she have after 5
    6·2 answers
  • Solve for x<br> a. 25<br> b. 180<br> c. 120<br> d. 20
    12·1 answer
  • The sum of a number and 3 times it’s reciprocal is 7/2. Find the numbers
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!