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zhuklara [117]
3 years ago
8

Which of the following is equivalent to4−(−5∗9−1)÷2+(5)2−7?

Mathematics
2 answers:
Gala2k [10]3 years ago
8 0

Answer:

-20

Step-by-step explanation:

Follow the PEDMAS order (from top to bottom):

Parentheses

Exponents

Division and Multiplication

Addition and Subtraction

(-5 × 9 - 1) ÷ 2 + (5)2 - 7

(-45 - 1) ÷ 2 + 10 - 7

-46 ÷ 2 + 10 - 7

-23 + 10 - 7

-13 - 7

-20

juin [17]3 years ago
5 0

Answer:

-20

Step-by-step explanation:

=> (-5 * 9-1)/2+(5)2-7

Expanding parenthesis

=> (-45-1)/2+10-7

=> -46/2 + 3

=> -23 + 3

=> -20

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What is the surface area of the rectangular prism?<br> lenth 16 with 4 and hight 4
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Answer:

272

Step-by-step explanation:

The formula is 2(LxW) + 2(LxH) + 2(WxH)

2(16 x 4) = 128

2(16 x 4) = 128

2(4 x 4) = 16

16 + 128 + 128 = 272

5 0
3 years ago
H + 12 = 31<br> equal what equation h=
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Move 12 to the other side, making it negative
h=31-12
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A scientist uses 3 gallon of liquid for every 6 hours he uses (blank) of a gallon each hour he works
adelina 88 [10]

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Step-by-step explanation:

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3 years ago
Read 2 more answers
Find four consecutive numbers whose sum equals 218
Softa [21]

Answer: 53, 54, 55, and 56

Step-by-step explanation: This problem states that the sum of 4 consecutive numbers is 218 and it asks us to find the numbers.

4 consecutive numbers can be represented as followed.

X ⇒ <em>first number</em>

X + 1 ⇒ <em>second number</em>

X + 2 ⇒ <em>third number</em>

X + 3 ⇒ <em>fourth number</em>

Since the sum of our 4 consecutive numbers is 218, we can set up an equation to represent this.

X + X + 1 + X + 2 + X + 3 = 218

On the left side of the equation, we can combine our x's and our numbers.

4x + 6 = 218

      -6     -6   ← <em><u>subtract 6 from both sides of the equation</u></em>

4x = 212

÷4    ÷4   ← <u><em>divide both sides of the equation by 4</em></u>

 <u>X = 53</u>

<u />

X ⇒ <em>first number   = 53</em>

X + 1 ⇒ <em>second number   = 54</em>

X + 2 ⇒ <em>third number   = 55</em>

X + 3 ⇒ <em>fourth number   = 56</em>

<em />

<em>Therefore, our 4 consecutive numbers are </em><em>53</em><em>, </em><em>54</em><em>, </em><em>55</em><em>, and </em><em>56</em><em>.</em>

4 0
3 years ago
Help me to choose the right answer
irga5000 [103]

Answer:

its B

Step-by-step explanation:

8 0
2 years ago
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