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Yuri [45]
3 years ago
10

22.5 + 7(n−3.4) simplified

Mathematics
1 answer:
NARA [144]3 years ago
7 0
-1.3+7n is the answer
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What is the positive solution to the equation 0 = –x2 + 2x + 1? Quadratic formula: x = StartFraction negative b plus or minus St
Vladimir [108]

Answer:

See attached for a "Neat" quadratic formula.

a = -1

b = 2

c = 1

x = [-2 +- sqr root( 4 -4*-1*1)] / -2

x = [-2 +- sqr root( 4 -4*-1*1)] / -2

x = [-2 +- sqr root(8)] / -2

x1 = (-2 +2.8284271247)  / -2

x1 = .8284271247 / -2

x1 = -0.41421

x2 = (-2 -2.8284271247)  / -2

x2 = ( -4.8284271247)  / -2

x2 = 2.4142135624

So the equation has the positive solution of

2.4142135624

Step-by-step explanation:

3 0
3 years ago
Pls help. will give brainliest :)
fomenos

Answer:

its option B

Step-by-step explanation:

8 0
2 years ago
Read 2 more answers
Mean, standard deviation and variance of 7,12,15,10,16
Lyrx [107]
Mean =12
Standard devation= 3.2863
variance???
4 0
3 years ago
What is the area of this figure? <br><br> Enter your answer in the box.
ale4655 [162]

Answer:

42 units squared

Step-by-step explanation:

break it up into smaller shapes. if you split the big shape at y = 2 and at y=-2, you'll get two triangles and one rectangle.

so the area of the rectangle = l x w

= 4 x 7

= 28

the area of the triangle is ( l x w )/2

= (7 x 2)/2

= 7

the other triangle is the same too

so the area of that is also 7.

now add all areas,

7+7+28 = 42

8 0
3 years ago
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Three salesmen work for the same company, selling the same product. And, although they are all paid on a weekly basis, each sale
Rom4ik [11]

Answer:

12 sales

Step-by-step explanation:

Let x represent the number of sales each man had.

For Salesman A, he earns $65 per sale; this is 65x.

For Salesman B, he earns $40 per sale; this is 40x.  We also add to this his weekly salary of $300; this gives us 40x+300.

Since their pay was equal, set the two expressions equal:

65x = 40x+300

Subtract 40x from each side:

65x-40x = 40x+300-40x

25x = 300

Divide both sides by 25:

25x/25 = 300/25

x = 12

5 0
3 years ago
Read 2 more answers
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