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3 years ago

Can someone please give me the answer I will mark u brilliant as soon as it pops up.

Mathematics

1 answer:

adelina 88 [10]3 years ago

7 0

9514 1404 393

Answer:

(a) 26 units

Step-by-step explanation:

The left-side vertical line extends from y = -3 to y = +3, so is 3-(-3) = 6 units long.

The bottom side horizontal line extends from x = -5 to x = 2, so is 2 -(-5) - 7 units long.

The sum of these two sides is 6 + 7 = 13 units. These two sides make up half of the perimeter, which is the total length of all four sides.

The perimeter is 2 × 13 units = 26 units.

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3a+a+2a-5a? Can someone give me the answer please? Ty

Shkiper50 [21]

Answer:

Step-by-step explanation:

=3a + a + 2a - 5a

=4a - 3a

= a

hope it helps u tate!

5 0

3 years ago

Read 2 more answers

Car A leaves San Diego at noon driving at 60 mph along a route which is 400 miles long to San Francisco. Car B leaves San Franci

lilavasa [31]

Distance = speed x time
Distance travelled by car A when car B started = 60 x 2 = 120 miles
Number of miles remaining at the time car B started = 400 - 120 = 280 miles.

At time of their meeting both cars has travelled a combined distance of 280 miles and has spent the same time.
Let t be the time they travelled together before they meet, then the sum of the distance travelled by car A and car B is 280miles.
60t + 80t = 280
140t = 280
t = 280/140 = 2 hours

After 2 hours car A has travelled a further 60 x 2 = 120 miles and car B has travelled 80 x 2 = 160 miles.

Total distance travelled be car A is 120 + 120 = 240 miles

Midpoint of the journey = 400/2 = 200 miles
Therefre, at the time they met, the were 40 miles from the midpoint and they are close to San Francisco.

3 0

3 years ago

Julia can finish a 20-mile bike ride in 1.2 hours. Katie can finish the same bike ride in 1.6 hours. How much faster does Julia

natali 33 [55]

Julia= 24 mph, Katie=32 mph.

Julia rides 8 mph faster than Katie

8 0

3 years ago

Read 2 more answers

The sum of 2 and a number divided by 3 is greater than -10

Harrizon [31]

Answer:

$\frac{x}{3} + 2 > -10$

Step-by-step explanation:

4 0

3 years ago

A recent kellogg survey shows that approximately 34% of americans eat breakfast. suppose alex takes a random sample of four amer

vlabodo [156]

This kind of experiments are ruled by Bernoulli's formula. If you have probability p of "success", and you want k successes in n trials, the probability is

$\binom{n}{k}p^k(1-p)^{n-k}$

It's easier to compute the first probability by difference: instead of computing the probability of the event "at least one of the surveyed eats breakfast", let's compute the probability of its contrary: none of them eats breakfast. So, we want 0 successes in 4 trials, with probability of success 0.34. The formula yields

$\binom{4}{0} 0.34^0 0.64^4 = 0.64^4 \approx 0.17 = 17\%$

Since the contrary has probability 17%, our event "at least one of the surveyed eats breakfast" has probability 83%.

As for the second question, the event "at least three of the surveyed eats breakfast" is the union of the events "exactly three of the surveyed eats breakfast" and "exactly four of the surveyed eats breakfast". So, we just need to sum their probabilities:

$\binom{4}{3} 0.34^3 0.64^1 +\binom{4}{4} 0.34^4 0.64^0 = 4\cdot 0.34^3 0.64 + 0.34^4 \approx 0.11 = 11\%$

3 0

3 years ago