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3 years ago

PLZ HELP!!!!!! (WILL GIVE BRAINLIEST!!!!)

Mathematics

1 answer:

nasty-shy [4]3 years ago

3 0

I think you times all of the inchs together. 5x3x2=30.

I dont know if i am right tho. Hope this help ya.

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Solving for systems of equations by substitution. <br><br> Y=4x <br> X+y=5

dolphi86 [110]

Since the first equation already gives you y, substitute Y for 4x in the second equation.
y=4x
x+y=5

x+(4x)=5
5x=5
x=1

Now that you know x, plug in x for 1 in the first equation.
y=4(1)
y=4
Answer: (1,4)

7 0

3 years ago

Choose the lowest common denominator.

Brilliant_brown [7]

1) 8

2) $-\frac{3}{4}=-\frac{6}{8}$ , so it is equal to $-\frac{6}{8}+\frac{5}{8}$

3) 1/8

4 0

2 years ago

A garage door opener has a ten number keypad. Codes to open the door must consist of 5 digits with no adjecent digits the sane.

grigory [225]

1st slot: 10 possibilities

2nd slot: 9 possibilities

3rd slot: 9 possibilities

4th slot: 9 possibilities

5th slot: 9 possibilities

10 * 9 * 9 * 9 * 9 = 65610 Possibilities

5 0

3 years ago

The angles of a triangle are in the ratio 5:6:7. find each angle.

svet-max [94.6K]

Answer:

50,60,70

Step-by-step explanation:

we need to multiply the numbers in the given ratio so that they add up to 180. 180 is total of 3 angels of a triangle

please mark brainliest ,it's

correct

5 0

3 years ago

How many real solutions if any, does 2x^2-3x+8=0

fenix001 [56]

Answer:

The quadratic equation $2\, x^{2} - 3\, x + 8 = 0$ has no real solution.

Step-by-step explanation:

Rewrite the quadratic equation $2\, x^{2} - 3\, x + 8 = 0$ in the standard form $a\, x^{2} + b\, x + c = 0$ :

$2\, x^{2} + (-3)\, x + 8 = 0$ , for which:

$a = 2$ .
$b = (-3)$ .
$c = 8$ .

The quadratic discriminant of $a\, x^{2} + b\, x + c = 0$ is $(b^{2} - 4\, a\, c)$ . The quadratic discriminant of $2\, x^{2} + (-3)\, x + 8 = 0$ would be:

$\begin{aligned}& b^{2} - 4\, a\, c \\ =\; & (-3)^{2} - 4 \times 2 \times 8 \\ =\; & (-55)\end{aligned}$ .

Since the quadratic discriminant of this equation is negative, this quadratic equation has no real solution.

3 0

2 years ago