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sergey [27]
3 years ago
11

−4.2(−2.8+4.5)​ I think I know what the answer is but I just want to be 100% sure. Please solve this and tell me your answer. I

would really appreciate it. Thanks!
Mathematics
1 answer:
Talja [164]3 years ago
7 0

Answer:

-7.14

Step-by-step explanation:

Evaluate

−4.2(−2.8 + 4.5)​

Open parenthesis

(-4.2 * -2.8) + (-4.2 * 4.5)

= (11.76) + (- 18.9)

= 11.76 - 18.9

= -7.14

NOTE:

Negative (-) × negative (-) = positive (+)

Positive (+) × positive (+) = positive (+)

Negative (-) × positive (+) = negative (-)

Positive (+) × negative (-) = negative (-)

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Whats the answer please help
lbvjy [14]
The answer would be 6.
8 0
3 years ago
A simplifie 6 × ( - 24 ) ÷ ( -4 )​
kumpel [21]

\huge\textbf{Hey there!}

\huge\boxed{\mathsf{6\times(-24)\div (-4)}}\\\huge\boxed{= \mathsf{\dfrac{6(-24)}{-4}}}\\\huge\boxed{\mathsf{= \dfrac{\bold{-144}}{-4}}}\\\huge\boxed{\mathsf{\dfrac{-144\div-4}{-4\div-4}}}\\\huge\boxed{= \mathsf{\dfrac{\bold{36}}{1}}}\\\huge\boxed{\mathsf{= 36\div1}}\\\huge\boxed{\mathsf{= 36}}\\\\\\\huge\text{\bf Therefore, your answer is: \boxed{\mathsf{36}}}\huge\checkmark

\huge\text{\bf Good luck on your assignment and enjoy}\\\huge\text{\bf your day!}

~\frak{Amphitrite1040:)}

8 0
2 years ago
No copy and paste answers.
miss Akunina [59]

Answer:

  2.5 miles

Step-by-step explanation:

The relation between time, speed, and distance is ...

  distance = speed × time

We can define t to be Stanley's swimming time. Then t+0.5 was his running time, and 2(t+0.5) was his biking time. His total distance covered is ...

  64 = 9(t +0.5) +16(2(t +0.5)) +2.5(t)

  64 = 43.5t +20.5 . . . . . . . simplify

  43.5 = 43.5t . . . . . . . . . subtract 20.5

  t = 1 . . . . . . . . . . . . . . divide by the coefficient of t

Stanley swam for 1 hour, so the distance he covered while swimming was ...

  (2.5 mi/h)(1 h) = 2.5 mi

Stanley covered 2.5 miles while swimming.

_____

<em>Additional comment</em>

Stanley ran for 1.5 hours, covering 9×1.5 = 13.5 miles. He biked for 3 hours, covering 16×3 = 48 miles. His total distance was 2.5 +13.5 +48 = 64 miles, as given.

6 0
2 years ago
The apple pie baked from 8:25 P.M. until 8:55 P.M. How much time did it take the pie to bake?
maw [93]

Answer:

30 minutes.

Step-by-step explanation:

8:55 - 8:25 is 30 minutes.

If you add 30 to 8:25, you would get 8:55.

Therefore, it's 30 minutes.

8 0
3 years ago
Read 2 more answers
The ratio of the number of boys to the number of girls inn math club is 4 to 3 there are 36 girls in math club how many boys are
Kay [80]

Answer:

48 boys

Step-by-step explanation:

Since the ratio of Boys to Girls is 4/3, set this equal to X number of boys/36. Cross multiply so 36*4=144, and 3*x= 3x. So now you have 144=3x, divide by 3 to get x=48 boys.

4 0
3 years ago
Read 2 more answers
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