All categories

3 years ago

Evaluate the numerical expression 2.5(−4.4 − 3.5)

Mathematics

1 answer:

Sophie [7]3 years ago

6 0

2.5(−4.4 − 3.5)
=−4.4 − 3.5=-7.9
=2.5(-7.9)
=-19.75

You might be interested in

The length of a rectangle is three times its width. One way to write an expression to find the perimeter would be

navik [9.2K]

It could be written as 8w the simplified version of the example.

Or you could write it as 2(3w + w) which is 2 time the length and width.

5 0

2 years ago

X÷2=6 need help Alguem me ajuda necesito ayuda

Ganezh [65]

Divide both sides by 2

X=3

8 0

2 years ago

Read 2 more answers

The music store sold 12 trumoets and 19 clarinets last month. If clariners sell for $139.95 and the store made $4,578.45 from sa

Kamila [148]

Answer:

$159.95

Step-by-step explanation:

Let price of trumphet be defined by $x$

price of clarinet = $139.95

Number of clarinets sold = 19

Earning through clarinets' sale = $19*139.95 = 2659.05$

Total earning of store = $4578.45

Earning through trumphets' sale = $4578.45 - 2659.05 = 1919.40$

price of one trumohet = $\frac{1919.40}{12} = 159.95$

price of clarinet = $159.95

7 0

3 years ago

Help! I will give brainliest!

alekssr [168]

Answer:

B 24

Step-by-step explanation:

3/5 is 54°

1/3 is 30°

54-30 = 24

8 0

3 years ago

Sarah answered 24 questions on her test correctly and earned an 80%. How many questions were on the test?

MaRussiya [10]

Answer:

43 questions in total

Step-by-step explanation:

the original equation with the unknown (total number of questions on the test) will look like this

$\frac{total \: number \: of \: questions \: on \: exam}{24 \: answered \: questions} = 80\%$

we know this because to work out a percentage in the 1st place you need the total ÷ number (in this case it's ÷ how many questions out of the total she did answer)

now you rearrange.

you need to move the 24 to get the total on it's own here's how you do it

$\frac{tot \: num \: of \: qs}{24} \times 24 = 80\% \times 24$

what you do to one side of equation you have to do to the other. the 24 and 24 on the left will cancel because 24÷24=1 and we don't write

got mum of Q's x 1= 80 x 24

now you convert % to decimal

$80\% \times 100 = 0.80$

replace

$tot \: num \: qs \: = 24 \times 0.80 = 19$

now you take the original and + the 19

$24 + 19 = 43$

therefore there are a total of 43 questions on the exam

5 0

3 years ago