2 years ago

How many solutions 9x +2y =9 / -3x + y=2

Mathematics

1 answer:

Fiesta28 [93]2 years ago

6 0

Answer:

Maybe the sum was a simultaneous equation....if so, this is the solution.

and the answer comes (1/3, 3)

Hope it helps! :)

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Need help ASAP!! Write an informal proof to show triangles ABC and DEF are similar.

yaroslaw [1]

Answer:

Δ ABC and Δ DEF are similar because their corresponding sides are proportional

Step-by-step explanation:

Two triangles are similar if their corresponding sides are proportional which means the corresponding sides have equal ratios

In the two triangles ABC and DEF

∵ AB = 4 units

∵ DE = 2 units

∴ $\frac{AB}{DE}=\frac{4}{2}=2$

∵ BC = 6 units

∵ EF = 3 units

∴ $\frac{BC}{EF}=\frac{6}{3}=2$

∵ CA = 2 units

∵ FD = 1 units

∴ $\frac{CA}{FD}=\frac{2}{1}=2$

∴ $\frac{AB}{DE}=\frac{BC}{EF}=\frac{CA}{FD}=2$

∵ All the ratios of the corresponding sides are equal

∴ The corresponding sides of the two triangles are proportional

∴ Δ ABC is similar to Δ DEF

6 0

2 years ago

A brother is 3 years older than his sister. Five years ago, the ratio of their ages was 4 : 3. Find the boy age.

Wewaii [24]

17 years old
12:9
12 + 5 is 17

5 0

2 years ago

7. All quadrilaterals have 4 sides and a trapezoid is a quadrilateral. How many sides does a trapezoid have? A: 5 B: 4 C: 3 D: 2

nata0808 [166]

Answer:

B: 4

Step-by-step explanation:

A trapezoid have 4 sides.

Hope it helps you in your learning process

5 0

2 years ago

Read 2 more answers

What is the measure of the missing angle?

Arturiano [62]

Your missing angle will be 73 degrees, because the angles all add up to 180. So you add 33 and 74 then subtract that from 180

7 0

2 years ago

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Which of the ratio equivalent to 1:3 select all that apply

nekit [7.7K]

Answer:

4:12

6:18

8:24

Two ratios that have the same value are called equivalent ratios. To find an equivalent ratio, multiply or divide both quantities by the same number.

3 0

2 years ago