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3 years ago

14

Robert went to visit his friend who lives 170 kilometers away. it took him 2.5 hours to drive to his friends house. at what spee

d did he drive

1 answer:

strojnjashka [21]3 years ago

3 0

I think it was 68 miles per hour.......... it is distance/time=speed.... right?

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(40 points + Brainliest for right answer).

exis [7]

The correct answer is C

8 0

3 years ago

The ratio of the number of cookies to the number of candies in different gift boxes is 5:7. Which table best shows the number of

Margarita [4]

Answer: 10:14, 15:21, 20:28

Step-by-step explanation: These are all multiples of 5 and 7.

5: 10, 15, 20

7: 14, 21, 28

So it is C. 10:14, 15:21, 20:28

7 0

3 years ago

Read 2 more answers

Solve. 10x^2 = 6 + 9x10x 2 =6+9x10, x, start superscript, 2, end superscript, equals, 6, plus, 9, x Choose 1 answer: Choose 1 an

yulyashka [42]

Answer:

Option B.

Step-by-step explanation:

If a quadratic equation is defined as

$ax^2+bx+c=0$ .... (1)

then the quadratic formula is

$x=\dfrac{-b\pm \sqrt{b^2-4ac}}{2a}$

The given equation is

$10x^2=6+9x$

It can rewritten as

$10x^2-9x-6=0$ .... (2)

On comparing (1) and (2) we get

$a=10,b=-9,c=-6$

Using quadratic formula we get

$x=\dfrac{-(-9)\pm \sqrt{(-9)^2-4(10)(-6)}}{2(10)}$

$x=\dfrac{9\pm \sqrt{81+240}}{20}$

$x=\dfrac{9\pm \sqrt{321}}{20}$

Therefore, the correct option is B.

6 0

4 years ago

Read 2 more answers

PLEASE HELP ME!!

solniwko [45]

Answer:

B) 38.4

Step-by-step explanation:

5 0

3 years ago

How do you solve this

Orlov [11]

A) since the ratio of green peppers to pureed tomatoes is 1:4, the tomatoes have 4 times the amount of mL as the peppers, so there are 20mL of green peppers he should mix with 80 mL of pureed tomatoes.

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3 years ago