All categories

3 years ago

PLEASE HELP‼️‼️ILL MARK BRAINLYEST ‼️‼️I MEAN IT PLEASE ‼️‼️‼️‼️‼️‼️‼️15 POINTS PLEASE ‼️‼️

Mathematics

1 answer:

adell [148]3 years ago

8 0

Answer:

1. Yes; 2. Yes ; 3. No; 4. Yes

Step-by-step explanation:

The proportion will have to be read the same way. For example top Δ bottom to the lower Δ bottom (locate in the same place)

14/21 = 6 /9 Yes because the top Δ bottom to lower Δ bottom = top side to

lower same side

13.5/21 = 9/ 14 Yes because the same two sides to the same two sides in

the lower Δ

9/13.5 = 6 21 No because top Δ side to lower Δ same location but the

second one top Δ side to the lower bottom

14 /6 = 21/6 Yes because top Δ bottom to top side = lower Δ bottom to

lower side (in the same place)

You might be interested in

Does anyone know this?

tresset_1 [31]

Answer:

f(x) = -x^2 + x + 13 find f(9) = -59

Hope this helps :)

4 0

3 years ago

Read 2 more answers

A plane flies x mph. How far can it go in y hours?

wel

The answer is xy hours.

8 0

3 years ago

What is the solution to 3x2 + 4x + 8 = 0

Fed [463]

Answer:

-2±2i√5 / 3

Step-by-step explanation:

You can't factor this equation, so you use the quadratic formula to solve it, which is

-b±√b-4ac/2a

6 0

3 years ago

The average temperature over a 10-day period in Phoenix was 98 degrees. For the first six days, it was sunny, and the average te

lyudmila [28]

Answer:

Step-by-step explanation:

The average for the first 6 days was 100, and it ended up dropping overall by 2 for the average.

6 days=x/6=100

4 days=x/4=98/100

You can do 96+100/2 which is 98 degrees.

7 0

2 years ago

The length of a rectangular deck is 4 times its width.

boyakko [2]

The area of the deck is 36 square feet.

<u>Solution:</u>

Assume l is the length of the deck; w is its width, P is its perimeter and A is its area.

Given that length of a rectangular deck is 4 times its width

$\Rightarrow l=4w \rightarrow(1)$

Perimeter of the deck is 30 ft

$\text{Perimeter of a rectangle} = 2(\text{ length }+\text{ width })\rightarrow(2)$

On substituting all the given values in (2) we get,

$\Rightarrow30=2(4w+w) \rightarrow \frac{30}{2}=5w \rightarrow 15=5w$

On dividing we get,

$\Rightarrow w=\frac{15}{5} \rightarrow w=3 ft$

If w=3, $\rightarrow l=4\times 3=12 ft$

$\text { Area }=\text{ width } \times \text{ length }$

On substituting the values in the above formula we get,

$A=12\times3=36 \text{ square feet }$

7 0

3 years ago