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3 years ago

Answer this and I’ll make you Brainly if it’s right

Mathematics

1 answer:

svlad2 [7]3 years ago

8 0

Answer:

Step-by-step explanation:

f(x)=7x+6

If you replace 1 for x you get 7, then add 6 and you get 13.

Continue replacing x with the in numbers and you'll see they are all right

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Andrea, Justin, and Virginia went to an office supply store. Andrea bought 6 pencils, 7 markers, and 8 erasers. Her total was $1

olga2289 [7]

Answer:

$x=0.25\,,\,y=1.75\,,\,z=0.25$

Step-by-step explanation:

Let $x,y,z$ denotes number of pencils, markers, erasers respectively.

For Andrea:

$6x+7y+8z=15.75\,\,\,(i)$

For Justin:

$6x+8y+5z=16.75\,\,\,(ii)$

For Virginia:

$5x+5y+7z=11.75\,\,\,(iii)$

On subtracting equations (i) and (ii), we get

$(6x+7y+8z)-(6x+8y+5z)=15.75-16.75\\-y+3z=-1\\y-3z=1\\y=1+3z$

Put $y=1+3z$ in equation (i)

$6x+7(1+3z)+8z=15.75\\6x+29z=8.75\,\,\,(iv)$

Put $y=1+3z$ in equation (iii)

$5x+5(1+3z)+7z=11.75\\5x+22z=6.75\,\,\,(v)$

Multiply equation (iv) by 5 and equation (v) by 6 and then subtract both the equations.

$5(6x+29z)-6(5x+22z)=5(8.75)-6(6.75)\\13z=3.25\\z=\frac{3.25}{13}=0.25$

Put $z=0.25$ in equation $y=1+3z$

$y=1+3(0.25)=1.75$

Put $y=1.75\,,\,z=0.25$ in equation (i)

$6x+7(1.75)+8(0.25)=15.75\\6x+12.25+2=15.75\\6x=1.5\\x=0.25$

8 0

3 years ago

What is the length of arc S shown below? Enter an exact expression.

aleksandrvk [35]

Answer:

S = 15π = 47.12

length of arc S = 15π

Attached is the image of the arc.

Step-by-step explanation:

Given;

Radius arc r = 10

Angle at the center of arc ⍉ = 3π/2

The length of the arc S can be derived using the formula;

S = r × ⍉

Substituting the values;

S = 10 × 3π/2

S = 30π/2

S = 15π = 47.12

length of arc S = 15π

6 0

3 years ago

Convert the unit. of length

Sergio [31]

Answer:

Step-by-step explanation:

<em>thats all i got sorry if thats wrong but i hope this helps.</em>

4 0

3 years ago

Please explain and help me with this question.

k0ka [10]

it is so easy

Step-by-step explanation:

can i help you

5 0

3 years ago

Given the following table of values for f(x), find f(2).

AleksandrR [38]

Step-by-step explanation:

Given F(x) is 5 10 8 5 7 14 where x is - 1 0 1 2 3 9,

the value of F(2) is 202,478

3 0

3 years ago