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3 years ago

PLEASE ANSWER ASAP FOR BRAINLEST!!!!!!!!!!!!!!!

Mathematics

1 answer:

IrinaK [193]3 years ago

7 0

Step-by-step explanation:

i think u had done something wrong in equation

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A smartphone plan has a monthly base fee that includes 5 gigabytes of data. An overage charge is applied when the data usage exc

Anna35 [415]

Answer:

B) the cost, in dollars, for each additional gigabyte used

Step-by-step explanation:

C=monthly cost

g=total number of gigabytes

5=starting number of gigabytes

Monthly Cost=15(number of gigabytes - 5 gigabytes)

C=5(g-5)

each additional gigabyte is charged for 5 dollars

7 0

3 years ago

Read 2 more answers

Find the value of x to the nearest degree.

bazaltina [42]

I believe it’s D sorry if I’m wrong

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3 years ago

Prove that Cos4x=8Cosx -8Cosx

harkovskaia [24]

Please see the image attached

8 0

2 years ago

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)

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

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4 years ago

Can i get answers pllzzzz

BabaBlast [244]

Answer:

C jsdjdjrishbxcbdjwiausus sorry I need to put the 20 words or.morrr

it's C

5 0

3 years ago