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3 years ago

4) Solve for x: 2x=8.

1 answer:

8 0

4) x=4 -> divide by 2
5) y=9 -> add 2
6) z=2 -> multiply 2 times 1
7) a=10 -> add 7 then divide by 3
8) b=3 -> distributive property, add 1 to other side, and then divide by 8
9) c= -d +4 -> subtract +d+1 and put on other side to solve
10) m= 10/p+2 -> distrubutive property, subtract 2m on both sides to solve

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The scale on a map is 1 inch =2 1/2 miles.the distance between two streets on the map is 1 3/4 inches what is the actual distanc

DanielleElmas [232]

Answer:

4 3/8 miles

Step-by-step explanation:

We are told that: the scale on a map is 1 inch =2 1/2 miles.the distance between two streets on the map is 1 3/4 inches

If 1 inches = 2 1/2 miles

1 3/4 inches =

Cross Multiply

1 3/4 × 2 1/2/1

= 7/4 × 5/2

= 35/8

= 4 3/8 miles

The actual distance between these streets is 4 3/8 miles

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3 years ago

1 3/5 times 2 1/2 how much does it equal

pav-90 [236]

Answer:

If the problem is asking $1\frac{3}{5} * 2\frac{1}{2}$ then the answer is 4

If it's asking $\frac{13}{5}*\frac{21}{2}$ then the answer is $\frac{273}{10}$

Step-by-step explanation:

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3 years ago

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A water sprinkler sprays in a circular pattern a distance of 10 ft from the sprinkler to the edge. What is the circumference of

vfiekz [6]

Answer:

Step-by-step explanation:

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3 years ago

If sin 0 = 4<br> what is cos O?<br> cos 0 =<br> =<br> Simplify your answer if possible.

Tems11 [23]

Answer:

cos(θ) = (√33)/7

Step-by-step explanation:

The relevant relation is ...

cos(θ) = √(1 -sin²(θ))

cos(θ) = √(1 -(4/7)²) = √(1 -16/49) = √(33/49)

cos(θ) = (√33)/7

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2 years ago

Determine if the matrix below is invertible. Use as few calculations as possible. Justify your answer. [Start 4 By 4 Matrix 1st

Len [333]

Answer:

Yes, it is invertible

Step-by-step explanation:

We need to find in the matrix determinant is different from zero, since iif it is, that the matrix is invertible.

Let's use co-factor expansion to find the determinant of this 4x4 matrix, using the column that has more zeroes in it as the co-factor, so we reduce the number of determinant calculations for the obtained sub-matrices.We pick the first column for that since it has three zeros!

Then the determinant of this matrix becomes:

$4\,*Det\left[\begin{array}{ccc}1&4&6\\0&3&8\\0&0&1\end{array}\right] +0+0+0$

And the determinant of these 3x3 matrix is very simple because most of the cross multiplications render zero:

$Det\left[\begin{array}{ccc}1&4&6\\0&3&8\\0&0&1\end{array}\right] =1 \,(3\,*\,1-0)+4\,(0-0)+6\,(0-0)=3$

Therefore, the Det of the initial matrix is : 4 * 3 = 12

and then the matrix is invertible

4 0

3 years ago