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3 years ago

I don’t know the answer

Mathematics

1 answer:

Harlamova29_29 [7]3 years ago

4 0

Y+2
because of ur a cheater

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What is the equation of the line that passes through the point (9, 6) and is perpendicular to the line y = 3x - 5?

Ilia_Sergeevich [38]

Answer:

Step-by-step explanation:

y = 3x - 5

m₁ = 3

The required line is perpendicular to y = 3x - 5. Let the required line's slope be m₂

m₂ = -1/m₁

m₂ = -1/3

Point (9,6)

Equation of line: y - y₁ = m(x - x₁)

y - 6 = (-1/3)(x - 9)

$y-6=\frac{-1}{3})x+\frac{1}{3}*9\\\\y-6=\frac{-1}{3}x+3\\\\y=\frac{-1}{3}x+3+6\\\\y=\frac{-1}{3}x+9\\$

5 0

3 years ago

Bob the builder is making 480 kg of concrete mix concrete is made by mixing cement sand and gravel in the ratio 1:3:4 how much d

Vera_Pavlovna [14]

Answer:

see the explanation

Step-by-step explanation:

Let

x ---> kilograms of cement needed

y ----> kilograms of sand needed

z ----> kilograms of gravel needed

we know that

$x:y:z=1:3:4$ ----> $x+y+z=1+3+4=8$

$x+y+z=480\ kg$

Divide 480 by 8

$480/8=60$ ----> scale factor

Multiply the scale factor by the ratio $1:3:4$

Find out the kilograms of cement needed

$60(1)=60\ kg$

Find out the kilograms of sand needed

$60(3)=180\ kg$

Find out the kilograms of gravel needed

$60(4)=240\ kg$

4 0

4 years ago

Find an ordered pair for 4 solution for -5x+y=6

grin007 [14]

⇒ Choose three values for $x$ and substitute in to find the corresponding $y$ values.

$(0,6),(1,11),(2,16)$

3 0

2 years ago

I NEED HELP ASAP AND PLZ THE RIGHT ANSWER

Elena L [17]

Answer:

Step-by-step explanation:

2 + 7 + 2 + 3 + 1 = 15

there are four friends

15/4= 3.75

and since one cant have 3.75 of a fruit, the answer should be three

5 0

3 years ago

Read 2 more answers

Use the number line to represent. -4 1/2 + 3 1/4. what is the sum?

dlinn [17]

Answer:

$\displaystyle A+B=-\frac{5}{4}$

Step-by-step explanation:

The Number Line

Let's call

$\displaystyle A=-4\frac{1}{2}$

$\displaystyle B=+3\frac{1}{4}$

Both numbers are given as mixed fractions. Let's convert them to improper fractions:

$\displaystyle A=-4\frac{1}{2}=-(4+\frac{1}{2})=-\frac{8+1}{2}=-\frac{9}{2}$

$\displaystyle B=3\frac{1}{4}=3+\frac{1}{4}=\frac{12+1}{4}=\frac{13}{4}$

The decimal values are A = -9/2=-4.5, B=13/4 = 3.25

Now represent the points in the number line. See the image below

Finally, calculate their sum:

$\displaystyle A+B=-\frac{9}{2}+\frac{13}{4}$

$\displaystyle A+B=-\frac{18}{4}+\frac{13}{4}=\frac{-18+13}{4}$

$\boxed{\displaystyle A+B=-\frac{5}{4}}$

4 0

3 years ago