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Yuliya22 [10]
3 years ago
6

Which of the following expressions is equal to -4x^2-36

Mathematics
1 answer:
liubo4ka [24]3 years ago
6 0

Answer:

Step-by-step explanation:

-4x^2-36 can be rewritten as -4(x^2 + 9).  The quantity in parentheses does not have real roots, but does have the imaginary roots ±3i.

Next time, please share the possible answer choices.

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Lin uses an app to graph the charge on her phone.
exis [7]

Answer:

  • See below

Step-by-step explanation:

<u>Use the graph to answer the following questions:</u>

When did she start using her phone?

  • At 2 afternoon

When did she start charging her phone?

  • At 8 afternoon

While she was using her phone, at what rate was Lin’s phone battery dying?

<u>From 100% to 40% between 2PM and 4 PM:</u>

  • (100 - 40)/(4 - 2) = 60/2 = 30% per hour
8 0
2 years ago
Read 2 more answers
A new mixture of​ self-tanning &amp; moisturizing lotions for everyday use is being developed. This mixture is made by mixing 70
777dan777 [17]

Answer:

450 ounces

Step-by-step explanation:

We know that the cost of the mixture C_m must be the cost of the everyday moisturizing lotion C_e plus the cost of the self-tanning lotion C_s, which means C_m=C_e+C_s.

The cost of any substance will be the cost per ounce of the substance (c), multiplied by the number of ounces (n), which means C=nc, so we have from the previous formula that we have:

n_m c_m=n_e c_e + n_s c_s

But we also know that the number of ounces of the mixture must be the sum of the number of ounces of the everyday moisturizing lotion with the number of ounces of the self-tanning lotion, so we have

n_e c_e + n_s c_s=n_m c_m=(n_e+n_s) c_m=n_e c_m+n_s c_m

We want to calculate the number of ounces of the​ self-tanning lotion (n_s), so we solve for that variable:

n_e c_e + n_s c_s=n_e c_m+n_s c_m

n_s c_s-n_s c_m=n_e c_m-n_e c_e

n_s (c_s-c_m)=n_e(c_m-c_e)

n_s=\frac{n_e (c_m-c_e)}{(c_s-c_m)}

And substitute our values in this formula, to get:

n_s=\frac{(700\ ounces) (\$1.6-\$0.7)}{(\$3-\$1.6)}=450\ ounces

7 0
3 years ago
(-7)(-5)(2)? Its just like that so...
MAVERICK [17]

Answer:

70

Step-by-step explanation:

-7 × -5 = 35

35 × 2 = 70

8 0
3 years ago
Read 2 more answers
City A is 25% less than population of city B so city A's population is what % of city B
omeli [17]

Answer:

75%

Step-by-step explanation:

we have

A ----> population of the city A

B ----> population of the city B

we know that

25% of B is equal to

(25/100)B=0.25B

so

A=B-0.25B

A=0.75B

0.75*100=75\%

That means ----> population of city A is 75% of population city B

7 0
3 years ago
For the function F(x)=2x+15x−2, evaluate F(−6)
Sholpan [36]
F(-6) = 2(-6)+15(-6)-2 = -12-90-2 = -104
7 0
3 years ago
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