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3 years ago

2 POINTS

Mathematics

2 answers:

Tasya [4]3 years ago

6 0

Answer: A

Step-by-step explanation:

First route: 70 miles divided by 55 mph = 1.27 hours

Second route: 85 miles divided by 65 mph = 1.31 hours

The first route takes less time so it’s better

AysviL [449]3 years ago

3 0

A cdohv,gguhn,

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Write 265000 in standard form

Verdich [7]

Answer:

Step-by-step explanation:

The answer is 2.65 x 10^5.

Hope it helped you.

Plz mark me brainliest.

7 0

3 years ago

Steve buys 2 lb of grapefruit and 3 lb of oranges for $7.20. Kennedy buys 4 lb of grapefruit and 2 lb of oranges for $8.80. Let

MrMuchimi

Answer: $\left \{ {{2x+3y=7.20} \atop {4x+2y=8.80}} \right.$

Step-by-step explanation:

Let be "x" the price per pound for grapefruit, "y" the price per pound for oranges.

We know that Steve buys 2 pounds of grapefruit and 3 of oranges for $7.20.

This means that the sum of the products of $2x$ and $3y$ is $7.20. Then, we can write this equation to represent it:

$2x+3y=7.20$

Kennedy buys 4 pounds of grapefruit and 2 pounds of oranges for $8.80.

This means that the sum of the products of $4x$ and $2y$ is $8.80. Then, we can write this equation to represent this:

$4x+2y=8.80$

Therefore, we get that the system of equations that models the situation is:

$\left \{ {{2x+3y=7.20} \atop {4x+2y=8.80}} \right.$

8 0

3 years ago

50 points :] !!

nasty-shy [4]

Given,

LP = 15, PR = 9

Point P lies on the line segment PR. It would mean that,

LP + PR = LR

⇒LR = 15 + 9

⇒ LR = 24

Hence, "LR = 24 because LP + PR = LR according to the Segment Addition Postulate, and 15 + 9 = 24 using substitution" is the correct option.

6 0

3 years ago

Plzzz helpppppppppppppp

Serga [27]

<u>Answer</u>

Center: (1,-12)

Radius: 5

$x^{2}$ + $y^{2}$ -2x+24y+120=0 (Subtract 120 on both sides and rearrange)

$x^{2}$ -2x+ $y^{2}$ +24y=-120 (Then divide 2 by 2 and square it. Do the same for 24.)

$x^{2}$ -2x+1+ $y^{2}$ +24y+144=-120+1+144 (You have to add the same numbers on both sides)

$(x-1)^{2} +(y+12)^2=25$ (Simplify)

So you would put (1,-12); r=5

8 0

3 years ago

A certain system can experience three different types of defects. Let Ai (i = 1,2,3) denote the event that the system has a defe

denis-greek [22]

By definition of conditional probability,

$P(A_2\mid A_1)=\dfrac{P(A_1\cap A_2)}{P(A_1)}$

The inclusion-exclusion principle tells us

$P(A_1\cap A_2)=P(A_1)+P(A_2)-P(A_1\cup A_2)=0.12+0.08-0.14=0.06$

Then

$P(A_2\mid A_1)=\dfrac{0.06}{0.12}=0.5000$

8 0

4 years ago