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BigorU [14]
3 years ago
7

3y2+5y-(4y2+5)-8y2-(-7-3y2)

Mathematics
1 answer:
Goshia [24]3 years ago
6 0

Answer:

-6y^2+5y+2

Step-by-step explanation:

I'm assuming you want to simplify:

3y^2+5y-(4y^2+5)-8y^2-(-7-3y^2)

Distribute to get rid of the ( ):

3y^2+5y-4y^2-5-8y^2+7+3y^2

Put like terms together:

3y^2-4y^2-8y^2+3y^2+5y-5+7

Combine the like terms:

-6y^2+5y+2

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In the figure below, the segment is parallel to one side of the triangle. The ratio of 12 to y is 1:2 1:3 1:4 2:3
Brrunno [24]

Answer:

Option B. 1 : 3

Step-by-step explanation:

There are two triangles shown in the picture attached ΔABC and ΔCD.

In these triangles sides AB and DE are parallel and BC is transverse line so ∠ABC = ∠EDC (corresponding angles)

Similarly AC is transverse to parallel lines AB and DE, so ∠BAC = ∠DEC (corresponding angles)

∠ACB is common in both the triangles.

Therefore ΔABC and ΔDEC are similar.

We know in similar triangles corresponding sides are in the same ratio.

\frac{AB}{ED}=\frac{AC}{EC}

\frac{y}{12}=\frac{30+15}{15}=\frac{45}{15}=3:1

Therefore ratio of y and 12 is equal to 3 : 1

Or ratio of 12 to y is 1 : 3

Option B is the answer.

7 0
4 years ago
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Worth 15 points. Brainliest will also be given to the first correct answer.
Alex73 [517]

Answer: It is C

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6 0
3 years ago
Mary spent a total of $60 at the grocery store. Of this amount, she spent $9 on fruit. What percentage of the total did she spen
crimeas [40]
9 divided by 60 equals 0.15, turn that into a percent 15%. Therefore, Mary spent 15% of the money on fruit.
3 0
3 years ago
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Anyone please !!!!!!
IgorLugansk [536]

Answer:

4

Step-by-step explanation:

Lets start by plugging in our (a) value

a^2 + 5a + 4

(-5)^2 + 5(-5) +4

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5 0
3 years ago
2 cubed x what x 5 = 120 <br><br>please i really need help
marin [14]

Answer:

2x3x5=120

Step-by-step explanation:

5 0
2 years ago
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