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3 years ago

Jill got an 85% on a math test if there were 40 questions in total,how many did she get wrong?

Mathematics

2 answers:

KengaRu [80]3 years ago

5 0

Yeah she got 6 questions wrong

GrogVix [38]3 years ago

3 0

You can solve this by setting up a proportion. You can put the number of items correct over the total number. and substitute the unknown number with x.

$\frac{85}{100}$ = $\frac{x}{40}$ Cross-multiply
3400 = 100x Divide both sides by 100
34 = x

40 - 34 = 6

So, Jill got 6 questions wrong.

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If x + 2 is a factor of x^2 +mx + 14 find m

jolli1 [7]

X² + mx + 14

If (x+2) one of the factors, we can write

14 = 2*7
m = 2+7= 9

x² +9x + 14 = (x+2)(x+7)

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4 years ago

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suter [353]

Answer:

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3 years ago

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vfiekz [6]

Step 1

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2 years ago

Find the area of the polygon. Figure ABCDE is shown. A is at 6, 0. B is at negative 4, 5. C is at 2, 5. D is at 2, 9. E is at 6,

kondaur [170]

This question is incomplete. The attached image was obtained online

Answer:

41 square units

Step-by-step explanation:

Looking at diagram that was attached, we can see that the Polygon s the combination of a square and a triangle.

In square CDEF we have:

The lengths of the side of the square= 4 units

Hence, the area of square is: length ²

Area of square= 4²

=16 square units

Also, in ΔBFA we have:

The base of the triangle is calculated as

=6 + 4= 10 units

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7 0

3 years ago

1: Ken earned $176 from his part-time job this summer. He spent 25% of his money on games. He is going to donate 14 of the rema

tatiyna

The charity will receive $ 11

<h3>Solution:</h3>

Ken earned $176 from his part-time job this summer

Amount earned = $ 176

He spent 25% of his money on games

Therefore,

Money spent on games = 176 - 25 % of 176

$\text{Money spent on games } = 176 - \frac{25}{100} \times 176\\\\\text{Money spent on games } = 176 - 0.25 \times 176\\\\\text{Money spent on games } = 176 - 44\\\\\text{Money spent on games } = 132$

He is going to donate 1/4 of the remaining money to charity

Reamining amount = 176 - 132 = 44

Therefore,

$Money\ given\ to\ charity = \frac{1}{4} \times 44 = 11$

Thus he gave $ 11 to charity

8 0

3 years ago