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xz_007 [3.2K]
3 years ago
7

What is the value of 2-2x-3y5 for x = 2 and y = -4?

Mathematics
1 answer:
a_sh-v [17]3 years ago
6 0
2 - 2(2) - 3(-4)5
2 - 4 + 60 = 58
The answer is 58
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The volume of the shipping box needs to be 1,144 cubic inches. The equation that models the volume of the shipping box is 8(n +
Snezhnost [94]

Answer:

see below

Step-by-step explanation:

8(n + 2)(n + 4) = 1,144

FOIL

8(n^2 +2n+4n+8) = 1144

Divide each side by 8

8/8(n^2 +2n+4n+8) = 1144/8

(n^2 +2n+4n+8) = 143

Combine like terms

n^2 +6n+8 = 143

Subtract 143 from each side

n^2 +6n+8 -143= 0

Combine like terms

n^2 +6n -135 =0

Factor

What two terms multiply to -135 and add to 6

-9*15 =-135

-9+15 = 6

(n-9) (n+15) =0

Using the zero product property

n-9 =0    n+15=0

n = 9   n=-15

The length cannot be negative so n = -15 cannot be  a solution

n =9

7 0
3 years ago
Read 2 more answers
I need help dont get it
Mariulka [41]

Answer:

a.) y= 25 + 5x

b.) 45$

Step-by-step explanation:

25$ from the start and adds 5 for extra

y= 25+5(4)

y=25+20

y=45$

7 0
3 years ago
2. Solve in two ways<br> 1/2 +1/4
Romashka [77]

Answer:

Step-by-step explanation: the first time you get 0.75 and the second time you get 0.125 hope this helped

6 0
3 years ago
A solution is heated from 0°C to 100°C. Between 0°C and 50°C, the rate of temperature increase is 1.5°C/min. Between 50°C and 10
muminat

Answer:

0.6 °C/min

Step-by-step explanation:

The relationship between rates and movement is ...

time = distance/speed

Here, the "distance" is measured in °C, and the "speed" is the rate of change of temperature.

For the first half of the heating, the time required is ...

(50°C -0°C)/(1.5 °C/min) = 50/(3/2) min = 100/3 min

For the second half of the heating, the time required is ...

(100°C -50°C)/(4/10 °C/min) = 50/(4/10) = 125 min

Then the total time is ...

((100/3) +125) min = (475/3) min

And the average rate of temperature increase is ...

total temperature change / total time

= (100°C -0°C)/(475/3 min) = 300/475 °C/min = 12/19 °C/min ≈ 0.6 °C/min

4 0
2 years ago
3 yd 2ft= how many inches?
Marina CMI [18]
36 inches is the answer. GOOD LUCK WITH UR ASSIGNMENT
8 0
2 years ago
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