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AlekseyPX
4 years ago
7

Use the quadratic formula to solve x2 + 7x + 8 = 0. Estimate irrational solutions to the nearest tenth.

Mathematics
1 answer:
QveST [7]4 years ago
6 0
<span>x2 + 7x + 8
a = 1
b = 7
c = 8
x = [-b +-sq root (b^2 -4ac)] / 2a
x = [-7 +- sq root (49 -4*1*8)] / 2*1
</span><span>x = [-7 +- sq root (49 -32)] / 2
x = [-7 +sq root (17)] / 2

</span>x1 = <span>[-7 +sq root (17)] / 2
x2 = </span><span>[-7 -sq root (17)] / 2
</span>
x1 = -1.4384
x2 = -5.5616


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Help please idk how to do it and plz show work
exis [7]
Ok well first of all let's calculate how many cartons there are of each size:

There are 264 cartons in total and 1/6 of these are small, 2/3 are medium and the rest are large, thus:
Number of small cartons = (1/6)*264 = 44
Number of medium cartons = (2/3)*264 = 176
Number of large cartons = 264 - (44 + 176)
= 264 - 220
= 44

Now we can calculate how many eggs are needed to fill each type of carton:

Each small carton holds 8 eggs, thus the number of eggs needed equals:
8*44 = 352 eggs
Each medium carton holds 12 eggs, thus the number of eggs needed equals:
12*176 = 2112 eggs
Each large carton holds 18 eggs, thus the number of eggs needed equals:
18*44 = 792 eggs

Thus the total number of eggs needed = 352 + 2112 + 792 = 3256
7 0
3 years ago
Write an equation of the line in slope-intercept form.
Pachacha [2.7K]

Answer:

y = 2x+3

Step-by-step explanation:

You can see that the line crosses the y-axis at (0,3), so the y-intercept is 3.

To find the slope, compare the coordinates of the two points marked on the line,  (0,3) and (-3,-3).

slope = Δy/Δx = ((-3)-3)/((-3)-0) = (-6)/(-3) = 2

Slope-intercept equation for line of slope 2 and y-intercept 3:

y = 2x+3

8 0
3 years ago
1. Ruth Lockwood earns $2,917 a month as a supervisor for Acme
soldi70 [24.7K]

Answer:

a. 25%

b. $1560

c. $130

Step-by-step explanation:

a.

If 75% is paid by company, the rest is paid by Ruth.

Out of 100%, 75% is paid by company, so Ruth pays 100 - 75 = 25%

b.

Per year, the total amount paid is 6240, but Ruth pas 25% of this. So,

25% = 0.25

To get the answer, we multiply 0.25 with 6240.

0.25 * 6240 = 1560

So, $1560 is paid by Ruth annually.

c.

Since 1560 is paid annually (in 12 months), each month Ruth has to pay:

1560/12 = $130

Hence, $130 is deducted each month from her paycheck

6 0
3 years ago
Domain and range of (4,-4),(2,-3),(-5,1),(4,-1)
aniked [119]

(x; y)


The domain is x.

The range is y.


Therefore

(4; -4) → x = 4; y = -4

(2;-3) → x = 2; y = -3

(-5; 1) → x = -5; y = 1

if is (-4; -1) not (4; -1) then

(-4; -1) → x = -4; y = -1


The DOMAIN = {-5; -4; 2; 4}

The RANGE = {-4; -3; -1; 1}


If is (4; -4) and (4; -1) then it is not a function.

4 0
3 years ago
Can you solve this plz -8(6x+3)
Kay [80]
-48x - 24 is the answer
3 0
3 years ago
Read 2 more answers
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