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STatiana [176]
3 years ago
11

What addition expression is equivalent to 3-(-7)?

Mathematics
2 answers:
Lesechka [4]3 years ago
4 0

Answer:

3 - (-7)

= 3 + 7.

Step-by-step explanation:

A double negative  is equivalent to a plus.

Varvara68 [4.7K]3 years ago
4 0

Subtraction a negative number is the same thing as adding a positive number.

3 - (-7) = 3 + 7

An addition expression is equivalent to 3 - (-7) is \Large\boxed{\mathsf{3~+~7}}

Hope This Helped! Good Luck!

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The height (in feet) of a certain rocket t seconds after it leaves the ground is modeled by
wolverine [178]

Answer:

The answer is 1/2 second

Step-by-step explanation:

Hope this helps

7 0
3 years ago
Set A of six numbers has a standard deviation of 3 and set B of four numbers has a standard deviation of 5. Both sets of numbers
Alenkinab [10]

Given:

\sigma_A=3

n_A=6

\sigma_B=5

n_B=4

\overline{x}_A=\overline{x}_B

To find:

The variance. of combined set.

Solution:

Formula for variance is

\sigma^2=\dfrac{\sum (x_i-\overline{x})^2}{n}      ...(i)

Using (i), we get

\sigma_A^2=\dfrac{\sum (x_i-\overline{x}_A)^2}{n_A}

(3)^2=\dfrac{\sum (x_i-\overline{x}_A)^2}{6}

9=\dfrac{\sum (x_i-\overline{x}_A)^2}{6}

54=\sum (x_i-\overline{x}_A)^2

Similarly,

\sigma_B^2=\dfrac{\sum (x_i-\overline{x}_B)^2}{n_B}

(5)^2=\dfrac{\sum (x_i-\overline{x}_B)^2}{4}

25=\dfrac{\sum (x_i-\overline{x}_B)^2}{4}

100=\sum (x_i-\overline{x}_B)^2

Now, after combining both sets, we get

\sigma^2=\dfrac{\sum (x_i-\overline{x}_A)^2+\sum (x_i-\overline{x}_B)^2}{n_A+n_B}

\sigma^2=\dfrac{54+100}{6+4}

\sigma^2=\dfrac{154}{10}

\sigma^2=15.4

Therefore, the variance of combined set is 15.4.

7 0
3 years ago
Which equation represents a function that is nonlinear?
Alenkasestr [34]

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7 0
3 years ago
Order: Claforan 50 mg/kg IV every 8 hours for infection. The infant weigh 14 kg Supply: Claforan 1g / 10 * m * L The package ins
o-na [289]

Answer:

The infant should be given 700 mg of Claforan every 8 hours.

Step-by-step explanation:

This question involves proportional measures, and asks how many mg of Claforan the infant should be given every 8 hours.

For each kg, the infant should be given 50 mg of Clarofan. The infant weighs 14 kg, so he should be given 14*50 = 700 mg of Claforan every 8 hours.

7 0
3 years ago
Will give brainliest!!
Harlamova29_29 [7]

Answer:

39

Step-by-step explanation:

105 times 0.38

multiply and get 39.9

you can't have a decimal of a person, so round down

4 0
3 years ago
Read 2 more answers
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