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Citrus2011 [14]
3 years ago
15

What’s the product (5r+2)(3r-4)

Mathematics
2 answers:
WINSTONCH [101]3 years ago
8 0
   5r + 2 
x 3r  - 4
------------
              -20r -8
15r^2      6r
------------------------
15r^2    + 14r -8 
Marrrta [24]3 years ago
3 0
(5r+2)(3r-4) =15r^2-20r+6r-8=15r^2-14r-8
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kolezko [41]
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So it is 134 R7

But if it’s rounded to the nearest then it is C.
4 0
3 years ago
If f(x) = x square - 4x + 6, find f(1) - f(-1)
VikaD [51]

Answer:

- 8

Step-by-step explanation:

Evaluate f(1) and f(- 1) by substituting x = 1 and x = - 1 into f(x)

Given

f(x) = x² - 4x + 6, then

f(1) = 1² - 4(1) + 6 = 1 - 4 + 6 = 3

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Thus

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8 0
4 years ago
Read 2 more answers
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sergey [27]

Step-by-step explanation:

5.

angle STQ is the supplementary angle (together they are 180° below line MQ) to 2x + 8.

above ST we have a group of 3 angles that combine to 180° :

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90°

71 - x

so, to get x first :

2x + 8 + 90 + 71 - x = 180

x + 169 = 180

x = 11

so, the angle MTS =

2x + 8 = 2×11 + 8 = 22 + 8 = 30°.

6.

therefore, the angle STQ is

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7 0
2 years ago
The Johnsons spent a total of ​$69.96 for dinner at their favorite restaurant last night. If this cost included a ​20%​ tip, how
enyata [817]
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Alisiya [41]

Answer:

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Step-by-step explanation:

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Since this value is positive it was an increase. Now we need to find the percentage at which it was increased, to do that we can use a rule of three in a way that the original value is 100% and the value we want to know is the percentage for the absolute increase. We do this as follows:

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12*x = 2400

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It was an increase of 200%.

8 0
4 years ago
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