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
Mandarinka [93]
3 years ago
7

Simplify -4(x-5)+3(9-7)

Mathematics
1 answer:
otez555 [7]3 years ago
5 0
-4x+20+27-21
is used distributive property to simplify your problem
x turns into -4x because the number is invalid
5 turns into 20 because -4x-5 equals a positive number
9 turns into 27
and 7 turns into 21
You might be interested in
Who started the problem correctly? The problem form is (-5) - (-1 3/4).
Veronika [31]

Answer:

Shane started the problem correctly

Step-by-step explanation:

We are given problem (-5) - (-1 3/4).

Mariah started the problem as (-5) + 1 - 3/4

Shane started the problem as (-5) + 1 + 3/4

We need to find who started the problem correctly.

The problem should be started by converting the mixed fraction into improper fraction i,e

-5-(-1\frac{3}{4})\\=-5-(-1-\frac{3}{4} )\\=-5-(-\frac{7}{4})

Now we will solve bracket by multiplying -1 with term inside the bracket i.e

=-5+\frac{7}{4}

= \frac{-13}{4}

Let's compare both the procedures now:

Mariah:

(-5) + 1 - \frac{3}{4}

=(-5) - \frac{1}{4}

=\frac{-21}{4}

Therefore, Mariah did not start the problem correctly.

Shane:

(-5) + 1 + \frac{3}{4}

= -5 + \frac{7}{4}

= \frac{-13}{4}

Therefore, Shane started the problem correctly.

6 0
2 years ago
Because of high production-changeover time and costs, a director of manufacturing must convince management that a proposed manuf
7nadin3 [17]

Answer:

See explanation below

Step-by-step explanation:

Here, a director of manufacturing must convince management that a proposed manufacturing method reduces costs before the new method can be implemented. The current production method operates with a mean cost of $220 per hour.

a) The alternative and null hypotheses would be:

H0: μ ≥ 220

Ha: μ < 220

b) Comment on the conclusion when H0 cannot be rejected:

When we fail to reject the null hypothesis H0, there is not enough evidence to conclude that the mean cost can be reduced from $220. Therefore the manager's proposed method cannot be implemented.

c) Comment on the conclusion when H0 can be rejected:

When the null hypothesis, H0 is rejected, there is enough evidence to conclude that the mean cost can be reduced from from $220. Therefore the manager's proposed method can be implemented.

3 0
3 years ago
a model plane has a scale of 1 in: 2 ft. if the real plane is 12 ft tall then how tall is the model plane.
adelina 88 [10]

Answer:

6ft tall

Step-by-step explanation:

Given we know that the scale is 1 in 2ft.

Using this information we know we could divide 12/2=6. We also know that we could multiply 2×6=12. Therefore, we know that the model plane is 6ft tall.

I hope this helps!

3 0
3 years ago
Read 2 more answers
Help find the domain pls i’ll rate beainliest
kvv77 [185]

Answer: D (-∞, ³⁄₂)

1. Find non - negative values for radicals. x ≤ ³⁄₂

2. Find undefined (singularity) points. x = ³⁄₂

3. Combine real regions and undefined points for final domain.

Final answer: x < ³⁄₂

6 0
3 years ago
A baker purchases flour each week from a wholesale warehouse. The chart shows the quantities and prices available this week. If
scZoUnD [109]

The chart showing the quantities and prices is;

Best Deal 1

Quantity of Flour Price

3 pounds $5.25

5 pounds $9.75

7 pounds $12.60

10 pounds $14.20

12 pounds $18.24

Answer:

difference between last weeks best deal = $0.3

Step-by-step explanation:

Let's calculate the unit price for each of the quantities in the chart.

For quantity of 3 pounds;

We have; unit price = 5.25/3 = $1.75

For 5 pounds;. Unit price = 9.75/5 = $1.95

For 7 pounds; unit price = 12.6/7 = $1.8

For 10 pounds; unit price = 14.2/10 = $1.42

For 12 pounds; unit price = 18.24/14 = $1.3

Thus, last weeks best deal is the lowest = $1.3

Thus; difference between last weeks best deal is given as;

= this weeks best deal - last weeks best deal

This gives;

$1.6 - $1.3 = $0.3

6 0
2 years ago
Other questions:
  • Two spinners are spun 20 times. A sum of 7 is landed on 5 times. What is the experimental probability of spinning a sum of 7?
    12·1 answer
  • Please help me out!!!!!
    7·1 answer
  • PLEASE HELP!!!!!!
    9·2 answers
  • Which of the following equations is equivalent to x - y = 8?
    5·2 answers
  • PLSS PLS PLS HELP ME I NEED THE ANSWER<br><br> question: solve for this solution using substitution.
    8·2 answers
  • Sarah bought 18 boxes of 65 pens at $12 a box. She sold 378 of them at 3 for $1.00 and the rest at 4 for $1.00. Find her total p
    10·1 answer
  • Help i need it fast and i did not listen​
    5·1 answer
  • A researcher is interested in investigating whether people perform better at dexterity tests while listening to classical music
    14·1 answer
  • What is the slope of a line through (-3, 4) and<br> (5, 6)?
    12·1 answer
  • How would I solve for x on this question
    7·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!