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4 years ago

What is the value of the expressionwhen a = 5 and b =2?

Mathematics

1 answer:

natta225 [31]4 years ago

8 0

Put the numbers where the corresponding variables are and do the arithmetic.

... 2(5) +(2) -3

... = 10 + 2 - 3

... = 12 - 3

... = 9

The appropriate choice is ...

... C. 9

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90-(18+-2)(3) 90-(16)(3)

WITCHER [35]

Answer:

1: 42

2: 42

Step-by-step explanation:

1: Subtract and plus the first equation using a calculator

2: Now subtract and plus the second equation using a calculator

Answers:

1: 42

2: 42

Hope this helps.

3 0

3 years ago

Read 2 more answers

AYO y'all can someone help wit this question urgent?

olasank [31]

Answer:

I think this is right lol

Step-by-step explanation:

f(x)=49+x

8 0

2 years ago

What is the relative maximum value of the function f(x) = –x3 + 6x2 – 9x – 1?

Vlad [161]

Answer:

-1.

Step-by-step explanation:

First find the derivative of f(x):

f'(x) = -3x^2 + 12x - 9 = 0 for a maximum or minimum.

-3(x^2 - 4x + 3) = 0

(x - 1)(x - 3) = 0

x = 1, 3.

To find which gives a relative maximum we find the second derivative:

f"(x) = -6x + 12

When x = 1 f"(x) = 6, positive.

when x = 3, f"(x) = -6, negative.

So x = 3 gives a maximum value of f(x).

f(3) = -(3)^3 + 6*(3)^2 - 9(3) - 1 = -1 (answer).

7 0

3 years ago

Rauol measured the height of 12 different plants in his garden in April. He measured them again in June. What is the difference

jasenka [17]

The question is incomplete. Here is the complete question.

Raoul measured the ehight of 12 different plants in his garden in April. He measured them again in June.

April Heights (in inches) 12 15 23 11 42 45 44 39 12 19 20 12

June Heights (in inches) 45 45 40 43 11 14 12 13 41 40 45 41

What is the difference between the mean height in April and the mean height in June?

Answer: The difference between means is 8.0

Step-by-step explanation: Mean is the average of a set of numbers.

It is calculated as:

$\mu=\frac{\Sigma x}{n}$

where

x is the numbers in the set

n is how many numbers are there in the set

For heights in April, the mean is:

$\mu_{1}=\frac{12+15+23+11+42+45+44+39+12+19+20+12}{12}$

μ₁ = 24.5

For heights in June, the mean os:

$\mu_{2}=\frac{45+45+40+43+11+14+12+13+41+40+45+41}{12}$

μ₂ = 32.5

The difference between means:

μ₂ - μ₁ = 32.5 - 24.5 = 8.0

The difference between the mean height in April and in June is 8.0 inches.

3 0

3 years ago

Answer with steps pls

scoray [572]

Answer:

A) 2¹²

Step-by-step explanation:

Given :

3x - y = 12

Equate the equation to y :

3x - y + y = 12 + y
12 + y = 3x
12 + y - 12 = 3x - 12
y = 3x - 12

Substituting in the expression :

$\frac{8^{x} }{2^{y} }$
$\frac{2^{3x} }{2^{3x-12} }$
${2^{3x-3x+12}}$
2¹²

6 0

2 years ago