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3 years ago

Evaluate 3x+y If x = -4 and y = 2

Mathematics

2 answers:

SVETLANKA909090 [29]3 years ago

5 0

Answer:

Step-by-step explanation:

3x+y

first start by putting each into the equation

3 ( x=-4)+(y+2)

x(-4)+2

use order of operations (PEMDAS)

multiplication is first, so you do x*-4

you get -4x

then add 2 to that

since x in an unown answer, you cannot add 2 +4

so the answer si -4x+2

Dafna1 [17]3 years ago

3 0

Answer:

-10

Step-by-step explanation:

3x + y

= 3(-4) + 2

= -12 + 2

= -10

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Answer:

$718\ min$

Step-by-step explanation:

Let

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3 years ago

A new shopping mall records 120 total shoppers on their first day of business. Each day after that, the number of shoppers is 10

Marta_Voda [28]

Answer:

1138

Step-by-step explanation:

From the information given:

We can represent it perfectly in an exponential form:

$m = p(q)^x$

where;

p = initial value = 120

q = base of the exponential form

q = 1 + r

here; r = rate in decimal = 10% = 0.1

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Replacing it into the exponential form, we get:

$m = 120(1.1)^x$

where;

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For the first day:

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For the second day:

$m = 120(1.1)^1$

m = 132

For the third day:

$m = 120(1.1)^2$

m = 145.2

For the fourth day

$m = 120(1.1)^3$

m = 159.72

For the fifth-day

$m = 120(1.1)^4$

m = 175.692

For the sixth-day

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For the seventh-day

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$= 120+ 132 + 145.2 + 159.72 + 175.692+193.2612+212.58732$

= 1138.46052

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