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2 years ago

Find the roots of this equation: (x+5)(x+9)=0

Mathematics

2 answers:

Paha777 [63]2 years ago

8 0

Answer:

x=-5 and x=-9

Step-by-step explanation:

First you use the first bracket to give you:

x+5=0

so x=-5

Then you use the second bracket to give you:

x+9=0

so x=-9

sweet-ann [11.9K]2 years ago

4 0

Answer:

x=-5, x=-9

Step-by-step explanation:

Use zero product property to set each term to 0: x+5=0, x+9=0.

x=-5, x=-9

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Following e.g. C, how do you do D? 30 points

mars1129 [50]

Answer:

x=(log(5/4))/(log(4))

Step-by-step explanation:

7 0

3 years ago

Read 2 more answers

a 400 g of a liquid of density 1.6g/cm3 is made from mixing liquids of density 1.2g/cm3 and 1.8g/cm3 find the mass of the liquid

gogolik [260]

Answer:

133.33g

Step-by-step explanation:

Let the:

Mass of 1.2g/cm³ of liquid = x

Mass of 1.8g/cm³ of liquid = y

From our Question above, our system of equations is given as:

x + y = 400........ Equation 1

x = 400 - y

1.2 × x + 1.8 × y = 1.6 × 400

1.2x + 1.8y = 640..... Equation 2

We substitute, 400 - y for x in Equation 2

1.2(400 - y) + 1.8y = 640

480 - 1.2y + 1.8y = 640

- 1.2y + 1.8y = 640 - 480

0.6y = 160

y = 160/0.6y

y = 266.67 g

Solving for x

x = 400 - y

x = 400 - 266.67g

x = 133.33g

Therefore, the mass of the liquid of density 1.2g/cm³ is 133.33g

7 0

2 years ago

A fast food restaurant sells two sizes of fries, small and large. On Friday they sold 24 fries

mihalych1998 [28]

Answer:

5:1

Step-by-step explanation:

So, we know that 20 fries were large, and 4 were small. So, we just set it up as 20:4 <em>(for every 20 large fries, there are 4 small ones)</em>. However, it needs to be simplified which results in 5:1.

Hope I helped!!

7 0

2 years ago

If f (x) = mx+c, f(4) = 11 and f (5)=13 find value of m and c

inysia [295]

m=2 and c=3

see the attachment for the detailed solution

8 0

2 years ago

Solve:<br> -2/3 a - 6 = 12 <br> what is a

Hitman42 [59]

Answer:

a = - 27

Step-by-step explanation:

- $\frac{2}{3}$ a - 6 = 12 ( add 6 to both sides )

- $\frac{2}{3}$ a = 18 ( multiply both sides by 3 to clear the fraction )

- 2a = 54 ( divide both sides by - 2 )

a = - 27

8 0

2 years ago