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KatRina [158]
3 years ago
9

Expressions can be written using a combination of numbers and letters. Those values can also be described using words. Choose AL

L expressions that are correctly described in words.
which is it

Mathematics
2 answers:
Alexxx [7]3 years ago
8 0

Answer:

A: 3a + 9: the sum of three times a and nine

C:15b − 10: ten less than the product of fifteen and b

Step-by-step explanation:

I just answer this question in US, and I got C right but choose the wrong answer for A.

These are the right answers.

Serga [27]3 years ago
7 0

WQJAbnuhajle hove ukleg disklhdnd obisolsyhdgo fibpiouhod09ziusvcevn Step-by-step explanation:

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A phone company offers two monthly plans. Plan A costs $10 plus an additional $0.15 for each minute of calls. Plan B costs $30 p
Mkey [24]

First, you need to write to expressions to model each situation:

Plan A: 10+0.15x

Plan B: 30+0.1x


Next, set the expressions equal to each other and solve for x:

10+0.15x=30+0.1x

<em>*Subtract 0.1x from both sides to isolate the variable*</em>

10+0.05x=30

<em>*Subtract 10 from both sides*</em>

0.05x=20

<em>*Divide both sides by 0.05*</em>

x=400


The plans would have the same cost after 400 minutes of calls.


To find how much money the plans cost at 400 minutes, plug 400 into either expression.  We'll use Plan A:

10+0.15(400)

10+60

70


The plans will cost $70.


Hope this helps!

3 0
3 years ago
4a + 3 = 15<br> What does (a) equal
olga2289 [7]
4a + 3 = 15
- 3
4a = 12
÷ 4
a = 3
I hope this helps!
5 0
3 years ago
Read 2 more answers
What is 450 increased by 18%
Blababa [14]
450*(1+0.18)=531 hence 450 increased by 18% is 531
6 0
3 years ago
Read 2 more answers
Twelve percent of the population is left handed. Approximate the probability that there are at least 20 left-handers in a school
DochEvi [55]

Answer:

Step-by-step explanation:

We would assume a binomial distribution for the handedness of the population. Let x be a random variable representing the type of handedness in the population. The probability of success, p is that a randomly chosen person is left handed only. Then probability of failure is that a chosen person is not left handed only(right handed only or both).

p = 12/100 = 0.12

number of success, x = 20

n = 200

the probability that there are at least 20 left-handers is expressed as P(x ≥ 20)

From the binomial probability calculator,

P(x ≥ 20) = 0.84

8 0
3 years ago
Write 3 more than twice a number is 7 , as a word a statement.
cupoosta [38]
Three plus a number times two.
6 0
3 years ago
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