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3 years ago

-7.12 = -4.8+× what is the answer?

2 answers:

7 0

You need to get the variable by itself, right? To do that, you need to get rid of the -4.8, and to do that, you need to add 4.8 to each side. -4.8 + 4.8 is 0. -7.12 + 4.8 is -2.32 (because you're adding them; however, since the number with the negative is larger, you keep the sign).

Your answer is -2.32

Don't forget to choose which answer is Brainliest!

Anettt [7]3 years ago

6 0

Simplify both sides of the equation

-7.12 = x-4.8

Flip the equation

x - 4.8 = -7.12

Add 4.8 to both sides

x-4.8+4.8 = -7.12 + 4.8

x = -2.32

I hope that's help !

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A quadratic function is a function of the form y=ax^2+bx+c where a, b, and c are constants. Given any 3 points in the plane, the

pochemuha

Answer:

The quadratic function whose graph contains these points is $y=-x^{2}-2x-2$

Step-by-step explanation:

We know that a quadratic function is a function of the form $y=ax^{2}+bx+c$ . The first step is use the 3 points given to write 3 equations to find the values of the constants a,b, and c.

Substitute the points (0,-2), (-5,-17), and (3,-17) into the general form of a quadratic function.

$-2=a*0^{2}+b*0+c\\c=-2$

$-17=a*-5^{2}+b*-5+c\\c=-25a+5b-17$

$-17=a*3^{2}+b*3+c\\ c=-9a-3b-17$

We can solve these system of equations by substitution

Substitute $c=-9a-3b-17$

$-9a-3b-17=25a+5b-17\\-9a-3b-17=-2$

Isolate a for the first equation

$-9a-3b-17=-25a+5b-17\\a=\frac{b}{2}$

Substitute $a=\frac{b}{2}$ into the second equation

$-9\left(-\frac{b}{2}\right)-3b-17=-2$

Find the value of b

$-9\left(-\frac{4b}{17}\right)-3b-17=-2\\ b=-2$

Find the value of a

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

The solutions to the system of equations are:

b=-2,a=-1,c=-2

So the quadratic function whose graph contains these points is

$y=-x^{2}-2x-2$

As you can corroborate with the graph of this function.

8 0

3 years ago

Is -9 a irrational number

GalinKa [24]

-9 is a rational number. Rational numbers are numbers that can’t be written as a simple fraction like pi (3.14...etc)

4 0

3 years ago

It cost benjamin 1.35 to send 9 text messages. How much would it cost to send 118 text messages?

Hatshy [7]

price of one message = 1.35 ÷ 9

1.35 ÷ 9 = 0.15

0.15 • 118 = ( 3 ÷ 20 ) • 118

118 • 3 = 354

354 ÷ 20 = 177 ÷ 10 = $17.7 to send 118 messages

please give brainliest

6 0

2 years ago

Find csc if tan= 3/4

barxatty [35]

Answer:

5/3

Step-by-step explanation:

Tangent is defined as the length of the opposite side of the triangle divided by the length of the adjacent side of the triangle. Since you know that two of the legs are 3 and 4, using the pythagorean theorem you know that the last side is 5. Sin is defined as the length of the opposite side divided by the length of the hypotenuse, which in this case is 3/5. Cosecant is just the reciprocal of that, or 5/3. Hope this helps!

6 0

3 years ago

the spoke of wheel reaches from the center of the wheel to its rim. If the circumference of the wheel is 42 inches, how long is

xz_007 [3.2K]

If each spoke reaches from the center of the wheel to its rim, then that means that each spoke is as long as the radius.

To calculate radius:

C=2πr

π=3.14
C=42 inches

42=2(3.14)r
2*3.14=6.28
42=6.28r

Divide 42 by 6.28

42/6.28=6.68

length of each spoke is 6.68 inches.

3 0

3 years ago