How can a geologist tell if a metamorphic rock is foliated

Answers

Answer 1

Answer:

Answer:

Step-by-step explanation:

Foliation forms when pressure squeezes the flat or elongate minerals within a rock so they become aligned. These rocks develop a platy or sheet-like structure that reflects the direction that pressure was applied.

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Solve each equation for the given variable a-2b=-10 for b

Answers

a-2b=-10
add 2b on both sides
a=2b-10
add 10 to both sides
a+10=2b
divide both sides by 2
a/2+10/2=a/2+5=b
b=5+a/2

There are two boards, a and b. The total length of both is 28 feet. Board b is at least 5 feet longer than board a, but the difference is not more than 12 feet. What are the possible lengths of the two boards?

Answers

Answer:

Step-by-step explanation:

Let a represent the length of board a.

Let y represent the length of board b.

The total length of both is 28 feet. This means that

a + b = 28

Board b is at least 5 feet longer than board a. This means that

b ≥ a + 5

The difference between both boards is not more than 12 feet. This means that

b - a < 12

Substituting a = 28 - b into b ≥ a + 5, it becomes.

b ≥ 28 - b + 5

2b ≥ 28

b ≥33/2

b ≥ 16.5

16.5 - a < 12

4.5 < a

a > 4.5

The possible lengths of board a is

8 to 11.5 feet

The possible lengths of board b is

16.5 to 20 feet

How do you know that 4x2x2 is the same as 4x4

Answers

If you would like to know if 4x2x2 is the same as 4x4, you can find out using the following step:

2x2 equals to 4, so instead of 2x2 you can write 4.

The result is: 4x2x2 = 4x(2x2) = 4x4, which is the same as 4x4 in the second part of the question.

Because 2×2=4
so 4×4=16
and 4×2×2=16

Matt bought 7 shirts for a total of $38. Tee shirts cost $5 and long sleeve shirts cost $6. How many of each type of shirt did he buy? HELP PLZ 100 POINTS

Answers

Answer:

tee shirt:4

sleeve shirt:3

Step-by-step explanation:

we are given two conditions

Matt bought 7 shirts for a total of $38
Tee shirts cost 5 dollars and long sleeve shirts cost 6 dollars

we want to figure out how many each type of shirt he bought

let tee and sleeve shirts be t and s respectively

according to the first condition

$\displaystyle t + s = 7$

according to the second condition

$\displaystyle5t + 6s = 38$

therefore

our system of linear equation is

$\displaystyle\begin{cases}t + s = 7 \n 5t + 6s = 38 \end{cases}$

now we need our algebra skills to figure out t and s

to do so we can use substitution method

cancel s from both sides of the first equation:

$\displaystyle t = 7 - s \: \cdots \: i$

now substitute the value of i equation to the second equation:

$\displaystyle 5(7 - s) + 6s = 38$

distribute:

$\displaystyle 35 - 5s+ 6s = 38$

collect like terms:

$\displaystyle s + 35 = 38$

cancel 35 to both sides:

$\displaystyle \therefore s = 3$

now substitute the value of s to the i equation:

$\displaystyle t = 7 - 3 \n \therefore \: t = 4$

hence,

he bought tee shirt4 and sleeve shirt3

In a group of 200 high school students, 36 are taking biology, 52 are taking Spanish, and 126 are taking neither biology nor Spanish. If one of these 200 students is to be chosen at random, what is the probability that the student chosen is taking biology but not Spanish?A.

7%

B.

11%

C.

18%

D.

37%

Answers

it 11% this is what i got

This question i need helo solve it

Answers

390

85(4)=50=390

....................

It will be 390 because if you multiply the 85x4=340 and if you add the 340+50=390

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Write the equations of the lines, representing the following conditions, in the form y = mx + b, where m is the slope and b is the y-intercept:Part A) Passes through (2, 5) and m = 3/4 Part B) Passes through (−3, 2) and (1, −3) Part C)m=2/5 and y-intercept =-6 Part D) x-Intercept = 4 and y-intercept = −2 Part E) Passes through (−2, 2) and parallel to 4x − 3y − 7 = 0

Write the equation of the parabola with a focus (1,2) and directrix y = 1

Please show work and please answer soon