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3 years ago

Gerald drives 200 miles in 2 1/2 hours. what is gerald's average speed?

Mathematics

1 answer:

Dimas [21]3 years ago

3 0

Answer:

80mph

Step-by-step explanation:

200 divided by 2 1/2 is 80.

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Find -7a-6B (Picture provided)

sertanlavr [38]

Answer:

Option c

$-7A-6B=\left(\begin{array}{ccc}40&-106&-32\\-46&43&25\\82&-62&-18\end{array}\right)$

Step-by-step explanation:

First multiply matrix A by -7.

Then multiply the matrix B by -6.

When multiplying a matrix by a number x you must multiply each element of the matrix by x.

Then we perform operation -7A

$-7\left(\begin{array}{ccc}-10&10&8\\-2&-1&5\\-4&8&-6\end{array}\right)=\left(\begin{array}{ccc}70&-70&-56\\14&7&-35\\28&-56&42\end{array}\right)$

Now we perform operation -6B

$-6\left(\begin{array}{ccc}5&6&-4\\10&-6&-10\\-9&1&10\end{array}\right)=\left(\begin{array}{ccc}-30&-36&24\\-60&36&60\\54&-6&-60\end{array}\right)$

Now we add the resulting matrices

$\left(\begin{array}{ccc}70&-70&-56\\14&7&-35\\28&-56&42\end{array}\right)+\left(\begin{array}{ccc}-30&-36&24\\-60&36&60\\54&-6&-60\end{array}\right)=\left(\begin{array}{ccc}40&-106&-32\\-46&43&25\\82&-62&-18\end{array}\right)$

7 0

3 years ago

How much is one ounce of Turkey if each is $6.99 each. 48, Oz. pkg

MaRussiya [10]

I think the answer is like 0.15¢ assuming the way to solve it is to divide the cost by the Oz per pkg which is 48 so 6.99/48 is 0.15¢ rounded

7 0

2 years ago

Cell phones are on sale for 40% off. The usual price of this phone is $315. How much will the phone cost after the discount?

Hunter-Best [27]

315 * .60
The phone is $189.

3 0

3 years ago

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A small plane has 20 rows of seats. Each row has 4 seats.

ch4aika [34]

Answer:

the total number of seats on the plane

Step-by-step explanation:

3 0

2 years ago

Angelluis spent $64.80 on six cheeseburgers. How did each cheeseburger cost?

Zina [86]

6 divided by 64.80
Your answer is 10.80 each cheeseburger

3 0

3 years ago

Read 2 more answers