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3 years ago

Simplify the expression b - 7 + b - 8

Mathematics

1 answer:

natulia [17]3 years ago

3 0

Answer:

2b - 15

Step-by-step explanation:

b - 7 + b - 8

You combined the two b's correctly, but didn't combine the two constants, -7 and -8.

Those combine to -7 + (-8) = -7 - 8 = -15, so the final answer is

2b - 15

you have -7 and are subtracting 8 more, so you are moving 8 units left on the number line, so it has to get more negative.

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Need help on this question

sashaice [31]

Either 2 $\frac{1}{7} or \frac{15}{7}$

7 0

3 years ago

Bruno bought 96 pounds of sugar for his bakery. Every day he used the same amount of sugar to make bakery items. After 10 days,

Tasya [4]

Bruno used 8.08 pounds of sugar each day, because if you multiply 8.08 times ten it gives you 80.8 and 96 - 80.8 = 15.2

7 0

3 years ago

If f(x) = 3^2 + 10x and g(x) = 2x-4, find (f-g)(x).

Marat540 [252]

What we know:

$f(x)=3^2+10x\\g(x)=2x-4$

(Also, $3^2=9$ )

What we need to solve:

$(f-g)(x)$ (This is equal to $f(x)-g(x)$ )

How you have to subtract $f(x)$ with $g(x)$ to get:

$(f-g)(x) = f(x)-g(x) = 9+10x+2x-4 = 12x+5$

Thus, the answer would be:

$12x+5$

3 0

3 years ago

Find the area of the figure below. Round to the nearest tenth.

leva [86]

6x9 + 3^2pi would be the area so 54+9pi=57.14

4 0

3 years ago

The quotient of a number x and −1.5 is 21

Andru [333]

Answer:

x = -31.5

Explanation:

We are given that the quotient of x and -1.5 is 21

This means that:

$\frac{x}{-1.5} =21$

To get the value of x, we will multiply both sides of the equation by -1.5

This means that:

$\frac{x}{-1.5} * -1.5=21*-1.5$

x = -31.5

Note that the value of x must be negative because we are dividing by a negative number and the quotient is positive (-ve/-ve is +ve and +ve/-ve is -ve)

Hope this helps :)

3 0

3 years ago