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Natasha_Volkova [10]
2 years ago
5

A truck driver makes a trip that covers 2,380 km in 28 hours. What is the driver’s average speed in km/h? WRITE YOUR ANSWER IN 3

SENTENCES
Mathematics
1 answer:
il63 [147K]2 years ago
5 0

Answer: Divide the total kilometers covered by the number of hours the driver travels. This means you divide 2,380 km by 28 hrs. To find the average. Meaning the average speed is 85km/h.

Step-by-step explanation:

Take the total km the driver has traveled and divide it by the total hours they have driven to find your answer.

2,380 km /28 hrs = 85 km/h

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If a pizza is cut into 8 pieces and 3 children each eat one piece, what fraction of the pizza is gone
liberstina [14]
The answer is 3/8 
hope it helps
please mark as brainliest i need one more
7 0
3 years ago
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Isabella spends $4.87 on paintbrushes and paint. How many of each item does she buy? Explain how you found your answer
Rina8888 [55]

Answer:Answer: Isabella buys 2 paintbrushes and 3 jars of paint.

Step-by-step explanation:

Isabella can buy together 5 paintbrushes ( p ) and jars of paint ( p ) : j + p = 5, She can`t buy 4 items ( because 4 * $0.99 = $3.96 < $4.87 ) and she also can`t buy 6 items ( 6 * $0.95 = $5.70 > $4.87 ). So: p = 5 - j. Another equation is: 0.95 * ( 5 - j ) + 0.99 j = 4.87, 4.75 - 0.95 j + 0.99 j = 4.87; 0.04 j = 0.12; j = 0.12 : 0.04; j = 3, p = 5 - 3 = 2. We can prove it: 0.95 * 2 + 0.99 * 3 = 1.90 + 2.97 = 4.87.

(Hope this helps!!!!)

5 0
3 years ago
R
Wittaler [7]

i have no idea what question you need answered

7 0
3 years ago
Read 2 more answers
2.
Gekata [30.6K]

Answer: the system has no solution.

Step-by-step explanation:

\displaystyle\\

\left \{ {{x^2y=16\ \ \ \ \ (1)} \atop {x^2+4y+16=0\ \ \ \ \ (2)}} \right. .\\

Multiply\  both\  sides\  of\  the\  equation\ (2)\   by\  y\  (y\neq 0):\\

x^2y+4y^2+16y=0\\

We\  substitute\  equation\  (1)\  into\  equation\  (2):\\

16+4y^2+16y=0\\

4y^2+16y+16=0\\

4*(y^2+4y+4)=0\\

4*(y^2+2*y*2+2^2)=0\\

4*(y+2)^2=0\\

Divide\  both\  sides\  of\  the \ equation\  by\  4:\\

(y+2)^2=0\\

(y+2)*(y+2)=0\\

So,\ y+2=0\\

y=-2.\\

\displaystyle\\We\  substitute\  the\  value\  of\  y\  into\  equation\  (1):\\x^2*(-2)=16\\Divide\  both\  sides\  of\  the \ equation\  by\  -2:\\x^2=-8\\x^2\geq 0\\ Hence,\ the\ system\ has\ no\ solution.

7 0
1 year ago
The grades on a history midterm at Almond are roughly symmetric with y = 85 and o = 2.0.
Alik [6]

Answer:

The z-score for Michael's exam grade is 0.50

Step-by-step explanation:

Data

  • mean, μ = 85
  • standard deviation, σ = 2.0
  • Michael's exam grade is the value of interest, x = 86

From definition, z-score is  computed as follows:

Z = (x - μ)/σ

Z = (86 - 85)/2.0

Z = 0.50

7 0
3 years ago
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