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2 years ago

Please help 4+(-10)-(-9)

Mathematics

2 answers:

Hunter-Best [27]2 years ago

5 0

Answer:

-15

Step-by-step explanation:

-10+-9=-19+4=-15

Artyom0805 [142]2 years ago

5 0

The answer is 3 if you need me to tell you how (text back)

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Dennis got 85 percent of the questions on the math test correct, which was out of 40. what was his actual mark?

makkiz [27]

Answer:

34/40

Step-by-step explanation:

85/100 cross multiply x/40

100x/100=3400/100

x=3400/100

3400/100=34

x=34

Picture included

(Sorry about my handwriting)

Hope this helps!! :)

Stay safe and have a wonderful day/night!!!!!

Brainliest?!?!

4 0

2 years ago

Please help i will mark brainliest

Evgen [1.6K]

Answer:

2. $\left[\begin{array}{ccc}1&4\\0&3\\\end{array}\right]$

3. $\left[\begin{array}{ccc}-3&21&60\\-15&9&-45\\\end{array}\right]$

4. $\left[\begin{array}{ccc}6&-14\\-2&-6\\\end{array}\right]$

Step-by-step explanation:

2. This matrix is easy, as it just requires addition.

$\left[\begin{array}{ccc}1&4\\0&3\\\end{array}\right]$ + $\left[\begin{array}{ccc}0&0\\0&0\\\end{array}\right]$ = $\left[\begin{array}{ccc}1&4\\0&3\\\end{array}\right]$

3. This matrix requires for the matrices to be multiplied first, then added.

$\left[\begin{array}{ccc}9&-15&18\\-27&15&-9\\\end{array}\right]$ + $\left[\begin{array}{ccc}-12&36&42 \\12& -6 & -36 \\\end{array}\right]$ = $\left[\begin{array}{ccc}-3&21&60\\-15&9&-45\\\end{array}\right]$

4. Here we can add the last 2 matrices to find x.

$\left[\begin{array}{ccc}2&-8\\-4&2\\\end{array}\right]$ + $\left[\begin{array}{ccc}4&-6\\2&-8 \\\end{array}\right]$ = $\left[\begin{array}{ccc}6&-14\\-2&-6\\\end{array}\right]$

Hope this helps! (Please consider giving brainliest)

4 0

2 years ago

a student found the slope of a line that passes through the points (1,14) and (3,4) to be 5. what mistake did she make?

mariarad [96]

$x_{1}=1$
$x_{2}= 3$
$y_{1} =14$
$y_{2}=4$
$Slope= \frac{rise}{run} = \frac{ y_{2} - y_{1} }{ x_{2} - x_{1} } = \frac{4-14}{3-1} = \frac{-10}{2} =-5$

answer: The student flipped the y values

3 0

2 years ago

Which fraction correctly shows the probability of14 favorable outcomes and 37 possible outcomes?

zepelin [54]

Answer: 14/37

Step-by-step explanation:

7 0

2 years ago

Read 2 more answers

What is radians converted to degrees? If necessary, round your answer to the nearest degree.

Tomtit [17]

To convert radians to degrees, make use of the fact that pi radians equals one half circle, or 180º.

This means that if you divide radians by pi, the answer is the number of half circles. Multiplying this by 180º will tell you the answer in degrees.

So, to convert radians to degrees, multiply by 180/pi, like this:

Degrees= radians X 180/pi

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2 years ago