3 years ago

SAMPLE QUESTION 2

Mathematics

1 answer:

Arlecino [84]3 years ago

5 0

Answer:

4 rth answer is correct if it is wrong plz comment

Step-by-step explanation:

=14-3/21

=11/21

2-1/6

1/6

4-3/12

1/12

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What subtraction sentence does this show?

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Answer:

Step-by-step explanation:

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PLEASEEEEEE HELP <br> Given: △ABC, D∈AC<br> m∠BDC=m∠ABC<br> AD=7, DC=9<br> Find: BC, BD/BA

Sergio [31]

Answer:

Step-by-step explanation:

Given: △ABC, D∈AC , m∠BDC=m∠ABC , AD=7, DC=9.

Solution: Let BC=x, From the given figure and the given information, it can be seen that △ABC is similar to ΔBDC by AA rule, thus using the proportionality theorem, we get

$\frac{AC}{BC}=\frac{BC}{DC}$

⇒ $\frac{16}{x}=\frac{x}{9}$

⇒ $x^{2}=144$

⇒ $x=12$

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Now, calculate the similarity scale,

k= $\frac{AC}{BC}$

= $\frac{16}{12}=\frac{4}{3}$

Therefore, $\frac{BA}{BD}=\frac{4}{3}$

⇒ $3BA=4BD$

⇒ $BA=\frac{4}{3}BD$

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3 years ago

The area of a parking lot is 805 square meters. A car requires 5 meters and a bus requires 32 square meters of space. There can

zlopas [31]

Answer:

80 cars will maximize revenue

Step-by-step explanation:

The revenue per square meter for parked cars is ...

$2.00/5 = $0.40

The revenue per square meter for buses is ...

$6.00/32 = $0.1875

Thus the available space should be used to park the maximum number of cars.

80 cars should be in the lot to maximize income.

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3 years ago

Ann is 10.5 years old. Marco is 11and 7/11 years old. How many years older is Marco than Ann?

JulijaS [17]

Answer:

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Step-by-step explanation:

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3 years ago

Is 4x + 8 = 2x + 7 + 2x - 20 a contradiction, identity, or neither?

leva [86]

Answer:

yes, contradiction

Step-by-step explanation:

4x+8=2x+7+2x-20

4x+8=2x+2x+7-20

4x+8=4x-13

This equation is invalid the right and left.

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