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JulsSmile [24]
3 years ago
9

I need help on 13-22 PLEASE

Mathematics
1 answer:
Katena32 [7]3 years ago
8 0

Answer:

-9

Step-by-step explanation:

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Which equation represents a parabola?
Evgesh-ka [11]

Answer:

(B)

Step-by-step explanation:

we know that standard equation of parabola y²= 4x or x² = 4y .

So option (B) is correct .

Hope it's helpful

5 0
3 years ago
Simplify the following expression. 3 2/5x3(-7/5)
Studentka2010 [4]

The simplified expression of 32/5 x 3(-7/5) is  -672/25

<h3>How to simplify the expression?</h3>

The mathematical expression is given as:

32/5 x 3(-7/5)

Evaluate the product of 3 and -7/5

32/5 x 3(-7/5) =  32/5 x -21/5

Evaluate the product of 32 and -21

32/5 x 3(-7/5) =  672/5 x -1/5

Evaluate the product of 5 and 5

32/5 x 3(-7/5) =  672/25 x -1

So, we have:

32/5 x 3(-7/5) =  -672/25

Hence, the simplified expression of 32/5 x 3(-7/5) is  -672/25

Read more about expressions at:

brainly.com/question/723406

#SPJ1

8 0
2 years ago
The cost of 5 kg of potatoes is £3.20
Tom [10]

Answer:

12kg=7.68

1.5=87

Step-by-step explanation:

I found the cost per kg

4 0
3 years ago
Plssss help me, I’m so confusedddd! This will decide if I can go to my dream school!
Leona [35]

Answer:

the answer is -16, hope this helps, and hope you get into your dream school!

Step-by-step explanation:

none needed

7 0
3 years ago
Read 2 more answers
How do measurements of time differ for events in a frame of reference that moves at 50% of the speed of light relative to us? At
ZanzabumX [31]

Answer with explanation:

Relation between Speed , Distance and time

Distance =Speed × Time

→It means Speed is inversely Proportional to time.

As distance will remain constant , in that frame of reference

If speed of light in a Medium

                              =s=3 \times 10^8 \frac{\text{meter}}{\text{second}}

Then, time taken to cross the medium = t seconds or hours or another unit of time.

Now, If speed of light is 50% of the speed of light relative to us

    That is Speed of light in another medium

                 =w=\frac{50}{100} \times 3 \times 10^8\\\\=1.5 \times 10^8 \frac{\text{meter}}{\text{second}}

Then, time taken to cross the medium = 2t seconds or hours or another unit of time.

Using Unitary Method

  \rightarrow v_{1}\times t_{1}=v_{2} \times t_{2}\\\\1.\rightarrow 3 \times 10^8 \times t=\frac{50}{100} \times 3 \times 10^8 \times t_{1}\\\\t_{1}=2t\\\\2.\rightarrow 3 \times 10^8 \times t=\frac{99.5}{100} \times 3 \times 10^8 \times t_{2}\\\\t_{2}=\frac{1000t}{995}\\\\t_{2}=\frac{200t}{199}

             

7 0
4 years ago
Read 2 more answers
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