What is the sum of -2 + (-5)

WILL GIVE THANKS, BRAINIEST, AND 5 STARS! PLEASE HELP!

Andrew [12]

Answer:

a = $\frac{1}{2}$ , b = 5, and $\frac{2b}{a}$ = 20

Step-by-step explanation:

f(x) = - x² + b, x ≤ 0 You would use this equation for f(-2). Since -2 is less than 0.

f(x) = - x² + b, x ≤ 0 ← You can ignore the x ≤ 0 part.

f(-2) = - (-2)² + b Input the value -2 as x. The question states that f(-2) =1.

1 = - (-2)² + b So switch f(-2) with 1 on the left side only.

1 = - (4) + b Simplify. Do the exponents first, so (-2)² = 4.

1 = - 4 + b

<u>+4 +4 </u> Do inverse operations

5 = b

Next,

f(x) = 2ax +3, x > 0 You would use his equation for f(2). Since 2 is greater than 0.

f(x) = 2ax +3, x > 0 ← You can ignore the x > 0 part.

f(2) = 2a(2) + 3 Input the value 2 as x.

f(2) = 4a +3 Simplify. The equation states f(2) = 5. So switch f(2) with 5

5 = 4a +3 on the left side only.

<u>-3 - 3</u> Do inverse operations

2 = 4a

$\frac{2}{4}$ = $\frac{4a}{4}$ Divide 4 on both sides to isolate the variable a

$\frac{2}{4}$ = a Simplify

$\frac{1}{2}$ = a

Then,

The second part says to find $\frac{2b}{a}$

$\frac{2b}{a}$

$\frac{2(5)}{(\frac{1}{2}) }$ Input both the values of a and b

$\frac{10}{\frac{1}{2} }$ Simplify

20.

The answer for a is $\frac{1}{2}$ , the answer for b is 5, and the answer for $\frac{2b}{a}$ is 20.

6 0

3 years ago

What is the common ratio for the geography sequence? -15,-9,-27/5,-81/25

Reptile [31]

1000 j etyuu was the night of my school week I am so

6 0

4 years ago

A= 2LW+2LH+2HW solve w

svetlana [45]

Pkay so here is YOUR ansew=wer uyour welcoeme i am ammath lover it is cofrrect W=(2LH/2L+2H)A

6 0

3 years ago

A solar collector is 2,0 m long by 1,5 m wide. It is held in place

icang [17]

Answer:

The width of the frame is 0.0746 meters

Step-by-step explanation:

We are told that after the frame has been attached to the solar collector, the area that is left exposed is $2.5m^2$ . As we see in the figure, the dimensions of this area are

$(w-2x)$ and $(l-2x)$

where $x$ is the width of the frame.

The product of these dimensions must equal the exposed area:

$(w-2x)(l-2x)=2.5m^2$

Now since $w=1.5m$ and $l=2m$ we have:

$(1.5-2x)(2-2x)=2.5$

we expand this and solve for x using the quadratic formula:

$4x^2-7x+3=2.5$

$4x^2-7x+0.5=0$

we get two solutions:

$x=1.6753$

$x=0.0746$

We take the second solution i.e $x=0.0746$ , because first one gives a width larger than the dimensions of the solar collector which cannot be possible.

Thus the width of the frame is 0.0746 meters.

7 0

4 years ago

Classify the polynomial 5m^10

Naily [24]

Answer:

Monomial

Step-by-step explanation:

A polynomial has terms in their equation.

When it is a trinomial, it usually follows the pattern such as x^2+2x+1.

When it is a binomial, it usually is something like x+2

...And finally, when it is a monomial, it can be anything that has just one term. So let's say 4x^8883293483.

The polynomial 5m^10 classifies under a monomial since it only has one term

3 0

3 years ago