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3 years ago

2x+7 + 3x+1 +x what’s the answer

Mathematics

2 answers:

egoroff_w [7]3 years ago

8 0

Answer:6 + 8

Step-by-step explanation:

Add the numbers

Combine like terms

kondor19780726 [428]3 years ago

6 0

Answer:

the answer is: 6x+8

Step-by-step explanation:

also can I have brainliest please? :)

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A ratio comparing a number to 100

katen-ka-za [31]

"Percent" - For details read the explanation given below.

percentages compare numbers in the numerator to 100 and the ratio that compares a number to 100 is logically called percent.

5 0

3 years ago

A thermometer is taken from a room where the temperature is 24oc to the outdoors, where the temperature is −15oc. After one minu

kap26 [50]

Solution:

Use Newton's Law of Cooling.

T = T_s + (T_0 - T_s)*e^(-kt)

where

T = temperature at any instant

T_s = temperature of surroundings

T_0 = original temperature

t = elapsed time

k = constant

Now, we need to find this constant. We are given that after one hour, the temperature drops to 13° C in a 7°C Environment.

T = 14, T_0 = 24, T_s = -15, t = 1, k = ?

T = T_s + (T_0 - T_s)*e^(-kt)

==> 14 = -15 + (24 - 7)*e^(-k)

==> 14 = 7 + 17*e^(-k)

==> 7 = 17*e^(-k)

==> 7/13 = e^(-k)

==> -k = ln(7/17)

==> k = -ln(7/17) ≈ 0.774

Now,

Let's calculate temperatures!

T = ?, T_0 = 24, T_s = -15, k = 0.773, t = 3

T = T_s + (T_0 - T_s)*e^(-kt)

==> T = -15 + (24 –(-15))*e^[ -(0.774)(2) ]

==> T = -15 + 39*e^(-1.548)

==> T ≈ 15.72° C

This the required answer.

7 0

3 years ago

Alguien me ayuda a resolver esto ecuacion ?

Gelneren [198K]

I don’t understand what you’re saying ?

7 0

3 years ago

The difference of two perfect cubes is 386. If the cube root of the smaller of the two numbers is 7, then the cube root of the l

choli [55]

Answer:

Step-by-step explanation:

Let the two perfect cubes be x and y where x > y.

According to the given conditions:

${x}^{3} - {y}^{3} = 386...(1) \\ y = 7...(2) \\ plug \: y = 7 \: in \: equation \: (1) \\ {x}^{3} - {7}^{3} = 386 \\ {x}^{3} - 343 = 386 \\ {x}^{3} = 343 + 386 \\ {x}^{3} = 343 + 386 \\ {x}^{3} = 729 \\ x = \sqrt[3]{729} \\ x = 9$

Thus the cube root of the larger number is 9.

8 0

3 years ago

Easy points :) <br> 2*2*2+2-1

kipiarov [429]

Answer:

Step-by-step explanation:

2*2=4*2=8+2=10-1=9

7 0

3 years ago