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erastovalidia [21]
3 years ago
6

Simplify 5 + 2{x - 4[3x + 7(2 - x)]}.

Mathematics
2 answers:
spin [16.1K]3 years ago
7 0

the answer is 

Remove unnecessary parentheses.<span><span>5+2x+16x−56</span><span>5+2x+16x-56</span></span>
Subtract <span>5656</span> from <span>55</span> to get <span><span>−51</span><span>-51</span></span>.<span><span>2x+16x−51</span><span>2x+16x-51</span></span>
Add <span><span>2x</span><span>2x</span></span> and <span><span>16x</span><span>16x</span></span> to get <span><span>18x</span><span>18x</span></span>.<span>18x−<span>51</span></span>
Thepotemich [5.8K]3 years ago
5 0

Answer:

34x - 107

Step-by-step explanation:


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Ben and Josh went to the roof of their 40-foot tall high school to throw their math books off the edge.
krok68 [10]

Answer:

  • Josh's book lands first
  • Ben's lands about 0.648 seconds later

Step-by-step explanation:

Using the given equation for v=60 and s=40, the height of Ben's book is ...

  h(t) = -16t² +60t +40

We want to find t when h(t) = 0, so we're looking for the solution to ....

  0 = -16t² +60t +40

Using the quadratic formula, we find the positive value of t to be ...

  t = (-60 -√(60² -4(-16)(40)))/(2(-16)) = (15 +√385)/8 ≈ 4.3277

__

Similarly, the height of Josh's book is ...

  0 = -16t² +48t +40

  t = (-48 -√(48² -4(-16)(40)))/(2(-16)) = (12 +√304)/8 ≈ 3.6794

__

The time before Josh's book lands is shorter by ...

  4.3277 -3.6794 ≈ 0.6482 . . . . . seconds

Josh's book reaches the ground first, by about 0.648 seconds.

3 0
3 years ago
Please someone actually help with this I don't understand how.​
tigry1 [53]

Answer:

Scatter plot

Step-by-step explanation:

Answer is 5

8 0
3 years ago
Kayla’s dollhouse has 15.15 square feet downstairs and 6.45 square feet upstairs. What is the estimated total area if you round
Hitman42 [59]

  • The area of Kayla's dollhouse upstairs = 15.15 square feet

  • The area of Kayla's dollhouse downstairs = 6.45 square feet

  • To find the estimated Total area of Kayla's dollhouse, we would apply the Addition Operation

  • The estimated total area is calculated using the formula :

Area of the dollhouse upstairs + Area of the dollhouse downstairs

Rounding to the decimals to the nearest tenth

  • The area of Kayla's dollhouse upstairs to the nearest tenth = 15.2 square feet

  • The area of Kayla's dollhouse downstairs to the nearest tenth = 6.5 square feet

15.2 square feet + 6.5 square feet = 21.7 square feet

The estimated total area of Kayla's dollhouse is  21.7 square feet

To learn more, visit the link below:

brainly.com/question/11118181

8 0
3 years ago
Solve for X. Please solve all four. First person to do so will get brainliest.
natali 33 [55]

Answer:

x=-12

x=10

x=-8

x=-5

Step-by-step explanation:

6 0
3 years ago
Read 2 more answers
10x+7=12x-5<br> what is x
Monica [59]
10x+7=12x-5
X equals 6
4 0
3 years ago
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