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fiasKO [112]
3 years ago
13

Write an equation for the following word problem: "the difference of twice a number and 3 is -21"

Mathematics
1 answer:
murzikaleks [220]3 years ago
4 0

Answer:

-9

Step-by-step explanation:

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When given an algebraic expression involving subtraction, why is it best to rewrite the expression using addition before identif
Ray Of Light [21]
Usually when you do expressions involving subtraction you can do Keep, Change ,Change
That means you keep the sign of the first number and change the other two signs.
It is best you rewrite the expression to addition because a lot of people don't do well with subtracting .
4 0
3 years ago
15 workers working 8hrs a day can complete a piece of work in 20 days. In how many days will 10 workers do it,working 6 hrs a da
mel-nik [20]

Answer:

40 days

Step-by-step explanation:

w1*h1*d1=w2*h2*d

15*8*20=10*6*d

2400=60d

d=2400/60

d=40

6 0
2 years ago
a shop sell 200 chocolate ; vanilla and strawberry ice cream 45% of the ice cream sold are vanilla and 35% are strawberry. how m
Oksanka [162]

The number of chocolate ice creams sold is 50.

<h3>How many chocolate ice creams are sold?​</h3>

There exist three kinds of flavors.

45% of the ice creams exist as vanilla

30% of the ice creams exist as strawberry

x percent of the ice creams exist chocolate

The total amount of ice cream exists 200 which equals 100%.

Therefore,

45% + 30% + x = 100%

To estimate the value of x, bring the variable to the left side and bring all the remaining values to the right side. Simplify the values to estimate the result.

Solving for x, then the value of x is,

x = 25%

Then the number of chocolate ice creams are:

25%(200) = 50.

The number of chocolate ice creams sold is 50.

To learn more about the value of x refer to:

brainly.com/question/9965443

#SPJ2

6 0
2 years ago
Question 5
geniusboy [140]

Answer:

\frac{4}{9}

Step-by-step explanation:

To find this probability, we have to know:

  • How many numbers are there in between 5 and 8 inclusive?
  • How many total numbers are there?

We simply divide the first answer by the second one and get our probability.

So, the numbers are 5,6,7,8 ----- that is 4 numbers

How many numbers are there in total?  That is:

0, 1, 2, 3, 4, 5, 6, 7, 8, or 9  ------- 9 numbers

Thus, the probability is 4/9

7 0
3 years ago
Assessment timer and count Assessment items Item 5 Louise bought 114 pounds of roast beef at $2.00 per pound and ​ 212 ​pounds o
nikklg [1K]

Answer:

228+318=556

Step-by-step explanation: in conclusion that's alot of meat

7 0
3 years ago
Read 2 more answers
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