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soldier1979 [14.2K]
3 years ago
5

Evaluate the expression below if b=4 and c= -7. 2b -(c + b)

Mathematics
2 answers:
kow [346]3 years ago
6 0
The answer is 11 b/c
The equation is ~ 2(4)-(-7+4) =11
KIM [24]3 years ago
4 0
(-7c + 4b) + 2b (-7c - 6b) = -1
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Find x if a] 5^x=625 root 5 b] 3^2x-1 = 243
katen-ka-za [31]

x=3, you can find this by using finding common bases for equation b because 243=3^5. Because of that you can get rid of three on both sides to get the equation 2x-1=5 and then just solve for x to get x=3. For the first equation 5^3=625 so that also proves x=3.

Sorry if my explanation is a little disorganized if you need more help feel free to ask

6 0
3 years ago
Quadrilateral PQRS is a square whos side length is 10. Let X and Y be points outside the square so that XQ = YS = 6 and XP = YR
erik [133]

Answer:

392

Step-by-step explanation:

Triangles XQP and YRS are right triangles because triples 6, 8, 10 are Pythagorean triples.

Extend lines XQ, YR, YS and XP and mark their intersection as A and B.

Quadrilateral XAYB is a square because all right triangles PXQ, QAR, RYS and SBP are congruent (by ASA postulate) and therefore

  • all angles of the quadrilateral XAYB are right angles
  • all sides of XAYB are congruent and equal to 6 + 8 = 14 units.

Segment XY is the diagonal of the square XAYB, by Pythagorean theorem,

XY^2=XA^2+AY^2\\ \\XY^2=14^2+14^2\\ \\XY^2=196+196\\ \\XY^2=392  

3 0
3 years ago
A cereal brand is on sale $2 for 32 oz. If Sally spent $8 on the cereal, how many ounces did she purchase?
Lelechka [254]

Answer:

it would be 128 because 8 divded 2 is 4. 4 is the number of cereal boxes now multiply 4 x32 which would be 128

3 0
3 years ago
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Estimate 428,731 - 175,842 = i have no idea
Mariulka [41]
428,731 - 175,842 = 252,889
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DerKrebs [107]

Answer:

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Step-by-step explanation:

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Y = -2 +4/3x

Y = 4/3 x -2

Y = 4/3 x -2

so slope or gradient is coefficient of x

4/3 is gradient.

6 0
3 years ago
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