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3 years ago

PLEASEEEE HELP!!! I really don’t understand math and I will Mark brainliest

Mathematics

1 answer:

lbvjy [14]3 years ago

8 0

Answer:

1.5

Step-by-step explanation:

Because the triangle are similar, they possess a proportional relationship in which the one triangle's side length is dilated by a unknown factor (y) to make its corresponding counterpart. Using this knowledge we can make the following two equations

3y=7 & xy=x+2 y is the variable representing the dilation factor

y=7/3 find the value of y

x(7/3)=x+2 substitute the value y into the equation

7/3x =x+2 solve for x

4/3x =2

(3/4)(4/3x)=2(3/4) multiply by the reciprocal

x=1.5

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Macy’s sells 4 TVs for $680. How much would 7 TVs cost?

antiseptic1488 [7]

Answer:

$\boxed{ \bold{ \huge{ \boxed{ \sf{1190 \: dollars}}}}}$

Step-by-step explanation:

Cost of 4 TVs = $ 680

Finding the cost of 1 TV

$\sf{ \frac{680}{4} } = 170 \: dollars$

Finding the cost of 7 TVs

Since, the cost of 7 TVs is more than that of 1 TV. So, the cost of 1 TV is multiplied by 7

$\sf{i.e \: 170 \times 7 = 1190 \: dollars}$

Hope I helped!

Best regards! :D

8 0

3 years ago

Read 2 more answers

Write an expression for this problem

bearhunter [10]

Answer:

Do it

Step-by-step explanation:

You do not know any math at all

5 0

3 years ago

BRAINLIESTTT ASAP! :)

serious [3.7K]

Ok so basically I dunno all the corr. coefict stuff, but...
in 10 sec it went for 4 to 8, that's doubled
then from 8 to 12 is, +4, 4×3

A. Just during these two intervals we have, y/x: 4/10, then 8/20, then 12/30
0.4, 0.4, 0.4, but then it goes 15/30 = 0.5
so it's not a perfect 100% (1.00) correlation, but it would be very close [I'd choose b) 0.99]

B. from 10-30mins, it went from 4 to 8 to 12
m = change in y ÷ change in x
m = (12-4)/(30-10) = 8/20 = 0.40

C. means that the rate there is 0.40 miles per min. steady, which is 0.40 miles/min × 60min/hr = 24mi/hr steadily without increase or decrease, but a slight decrease from 30-40
RARELY say Causation, Ehr on the side of caution... correlation when in doubt

6 0

3 years ago

George is averaging 45 minutes of homework each school night most of the time george has five days a week and his school year la

bezimeni [28]

45 x 5 = 225 minutes per week

225 x 36 = 8,100 minutes per school year

8 0

3 years ago

6x+3y=15 for y. What does y equal if x=2? If x=5?

IrinaVladis [17]

If x=2, the equation would be 6 (2) + 3y = 15.

This simplifies to 12 +3y = 15. Subtract 12 from both sides and you get 3y = 3. Divide both sides by 3 and you get y = 1.

So if x = 2, y =1

If x = 5, the equation becomes 6 (5) + 3y = 15.

This simplifies to 30 + 3y = 15. Subtract 30 from both sides and you get 3y = -15. Divide both sides by 3 and you get y = -5.

So if x =5, y = -5.

I hope this helps!

6 0

4 years ago