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VladimirAG [237]
2 years ago
11

Help please

Mathematics
1 answer:
bearhunter [10]2 years ago
4 0

Answer:

1. 7.66 x 10^4

2. 2.415×10²

Step-by-step explanation:

2. 8×105-5.7×105=241.5

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frozen [14]
I’ll answer right now let me get a paper real quick
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Y = x^2+ 7x - 5 can be written in the form y = (x + a)^2+b
BARSIC [14]

Answer:

see explanation

Step-by-step explanation:

The equation of a parabola in vertex form is

y = (x - h)² + k (h, k) are the coordinates of the vertex

Given y = x² + 7x - 5

To express in vertex form use the method of completing the square

add/subtract ( half the coefficient of the x- term )²

y = x² + 2( \frac{7}{2} )x +\frac{49}{4} - \frac{49}{4} - 5

y = (x + \frac{7}{2} )² - \frac{49}{4} - \frac{20}{4}

y = (x + \frac{7}{2} )² - \frac{69}{4}

Hence

a = \frac{7}{2} and b = - \frac{69}{4}

8 0
2 years ago
Help I guess? sorry I'm asking a lot of questions today
valina [46]

Answer:

63 houses have been sold this year.

Step-by-step explanation:

There are 81 houses in the community. If 7/9 are sold this year, then all you have to do is multiplication.

In this case, you would multiply 81 by 7/9 to get your answer.

81/1 x 7/9:

Cancel out the 9 and the 81. Then the denominator will be 1 x 1 and the numerator would be 7 x 9. It would be 63 (7x9=63) over 1 (1x1=1) which is just 63. Make sure to include units.

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The product of the reaction between ethanal and ammonia are what. ​
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Answer:

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Step-by-step explanation:

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3 years ago
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Answer:

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Step-by-step explanation:

1)18.69-5.25=13.44

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2)13.44/1.68=8

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2 years ago
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