MATHEMATICS HIGH SCHOOL

What would the x point be if the y is 0 in equation y=-x+4

Answers

Answer 1

Answer:

Answer:

Step-by-step explanation:

y = -x + 4

if y = 0, then

0 = -x + 4

x = 4

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I neeeed helppppppp pleaseeee

Answers

Answer: 6144m^2

Step-by-step explanation:

E79: Substitute values into more general algebraic expressions.v= u + at
u = 1
a = 3
t = 1/2
Work out the value of v.

Answers

Answer: $v=(5)/(2)$

Step-by-step explanation:

First, substitute the variables with the given values.

$v=u+at$ turns into $v=1+(3)((1)/(2) )$

First, multiply what is in the parentheses

$(3)((1)/(2))=(3)/(2)$

$v=1+(3)/(2)$

Turn 1 into a fraction over 2 by multiplying 1 by 2 and using it as the numerator

$1=(2)/(2)$

$v=(2)/(2) +(3)/(2)$

Add

$v=(5)/(2)$

What is -4+(-2)=

I have no clue what i’m doing

Answers

Answer:

-6

Step-by-step explanation:

its just negative four plus negative two

they only put it in parentheses because they cant have both signs right next to each other

What is equivalent to 1.43 × 10²?

Answers

To do this, take 1.43 and move the “.” two places to the right (the 2 comes from the exponent on 10). So your answer is 143.

On my 30th birthday, I plan to light 30 candles on my cake and blow 30% of them.How many candles will stay lit after I'm done?

Answers

Answer:

30% of 30 = 9

Step-by-step explanation:

20 candles will stay lit

Which two numbers add up to 5 and multiply to -45 ?

Answers

we have x+y=5
xy=-45
solve
x+y=5
subtract x from both sides
y=-x+5
subsiute -x+5 for y in second equaiton
x(-x+5)=-45
-x^2+5x=-45
add 2x^2-5x to both sides
0=x^2-5x-45
use quadratic equation which is
if you have 0=ax^2+bx+c then x= $\frac{-b+ \sqrt{b^(2)-4ac} }{2a}$ or $\frac{-b- \sqrt{b^(2)-4ac} }{2a}$
sbsitute
1x^2-5x-45
a=1
b=-5
c=-45
subsitute
$\frac{-(-5)+ \sqrt{-5^(2)-4(1)(-45)} }{2(1)}$
$(5+ √(25-(-180)) )/(2)$
$(5+ √(25+180) )/(2)$
$(5+ √(205) )/(2)$

or $\frac{5- \sqrt{} }{2}$ or aprox x=-4.65891 or 9.65891, so the 2 numbers would be those answers for x

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