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3 years ago

Help me i’ll give brainliest

Mathematics

1 answer:

jonny [76]3 years ago

4 0

Answer:

D and B

Step-by-step explanation:

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1234567891011 Mistake

nexus9112 [7]

Answer:

WHAT IS THE QUESTION?

Step-by-step explanation:

PLEASE COMMENT DOWN I WILL SHOUT OUT YOUR NAME IN MY YT CHANNEL JUST PUT DOWN THE ANSWER

3 0

3 years ago

4x^2-21x-18=0 Find the discriminate

SpyIntel [72]

a = 4, b = -21, c = -18

to keep from getting "mixed up", evaluate the discriminant first ...

b2 - 4ac = (-21)2 - 4(4)(-18) = 729

sqrt(729) = 27

x = (21 +/- 27)/8

x = -3/4, x = 6

since the discriminant is a perfect square, the original quadratic will factor ...

4x2 - 21x - 18 = 0

(4x + 3)(x - 6) = 0

x = -3/4, x = 6

6 0

2 years ago

Read 2 more answers

Solve using the elimination method: X-3y=7 3x + 3y=9

sergij07 [2.7K]

Answer:

$x=4\\\\y=-1$

Step-by-step explanation:

Given Equation:

$x-3y=7$ Equation:1

$3x + 3y=9$ Equation:2

Dividing Equation:2 by '3' both the sides:

$x+y=3$

or $x=3-y$ Equation:3

Putting the vale of 'x' in Equation:1

$x-3y=7$

$(3-y)-3y=7\\\\3-y-3y=7\\\\3-4y=7\\\\$

Subtracting '3' both sides

$-4y=7-3\\\\-4y=4$

$y=\frac{4}{-4}$

$y=-1$

Putting value of 'y' in Equation:3

$x=3-y$

$x=3-(-1)\\\\x=3+1\\\\x=4$

The solution of the equations is :

$x=4\\\\y=-1$

7 0

3 years ago

Find the balance on a deposit of $455 that earns 4% interest compounded annually for 2 years. $36.40 $491.40 $492.13 $819

STatiana [176]

$A=P(1+ \frac{r}{n})^{tn}$
A=future amount
P=present amount
r=rate in decimal
n=number of times per year compounded
t=time in years

given
P=455
r=4%=0.04
n=1
t=2

$A=455(1+ \frac{0.04}{1})^{(2)(1)}$
$A=455(1+ 0.04)^{2}$
$A=455(1.04)^{2}$
A=492.128
round
$492.13
3rd option

5 0

3 years ago

Read 2 more answers

In the diagram, line p is parallel to line q. What is the value of x and y? (NEED HELP)

hichkok12 [17]

Y is 42°

The x is not the picture

4 0

2 years ago