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3 years ago

Ebony earned scores of 72 70, 81, 99, and 88 on five math tests. Determine her

Mathematics

1 answer:

Minchanka [31]3 years ago

6 0

Let it be x

$\boxed{\sf Average=\dfrac{Sum\:of\:terms}{No\:of\:terms}}$

$\\ \sf\longmapsto \dfrac{72+70+81+99+88+x}{6}=83$

$\\ \sf\longmapsto \dfrac{410+x}{6}=83$

$\\ \sf\longmapsto 410+x=498$

$\\ \sf\longmapsto x=498-410$

$\\ \sf\longmapsto x=88$

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Write 0.8 in simplest form fraction

grin007 [14]

Listen .8 Is pronounced eight tenths or in fraction eight over ten then simplified to 4 over 5

7 0

3 years ago

A baker buys 19 apples of two different varieties to make pies. The total cost of the apples is $5.10. Granny Smith apples cost

Natasha2012 [34]

The baker bought 7 gala apples, and 12 granny smiths apples

Solution:

Let "x" be the number of gala apples bought

Let "y" be the number of granny smith apples bought

Cost of 1 gala apple = $ 0.30

Cost of 1 granny smith apple = $ 0.25

A baker buys 19 apples of two different varieties to make pies

Therefore,

number of gala apples bought + number of granny smith apples bought = 19

x + y = 19 --------- eqn 1

The total cost of the apples is $5.10

Therefore, we can frame a equation as:

number of gala apples bought x Cost of 1 gala apple + number of granny smith apples bought x Cost of 1 granny smith apple = 5.10

$x \times 0.30 + y \times 0.25 = 5.10$

0.3x + 0.25y = 5.1 -------- eqn 2

Let us solve eqn 1 and eqn 2

From eqn 1,

x = 19 - y ---------- eqn 3

Substitute eqn 3 in eqn 2

0.3(19 - y) + 0.25y = 5.1

5.7 - 0.3y + 0.25y = 5.1

5.7 - 0.05y = 5.1

0.05y = 5.7 - 5.1

0.05y = 0.6

y = 12

Substitute y = 12 in eqn 3

x = 19 - 12

x = 7

Thus the baker bought 7 gala apples, and 12 granny smiths apples

6 0

3 years ago

Please math help and please show work!

Galina-37 [17]

Since they are similar triangles, they are just enlarged versions of each other. This means that the left-most angle of triangle XYZ is also 35°.

Angles in a triangle add up to 180°, so we can find the missing angle by subtracting the two known angles from 180.

180 - 70 - 35 = 75
The right-most angle of triangle XYZ would be 75°.

Hope this helps!

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2 years ago

If you can get the right answer I'll give brainliest Evaluate log_(3)7

vodka [1.7K]

Answer:

Exact Form:

log ( 7 )

log ( 3 )

Decimal Form:

1.77124374

Step-by-step explanation:

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2 years ago

Read 2 more answers

A(x-y) + b (x-y) factorize

Andre45 [30]

Answer:Given expression : a(x-y)-b(x-y)

Now, (x-y) is common in both terms.

First factor is (x-y).

∴a(x−y)−b(x−y)=(x−y)(a−b)

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Good luck

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2 years ago