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Iteru [2.4K]
2 years ago
7

Please help I’m being timed.

Mathematics
1 answer:
Andreas93 [3]2 years ago
6 0

Answer:

a) 16

b) -8

c) 2

Step-by-step explanation:

Given:

p = 2

q = -3

r = -1

a)

5p - 2q

Substitute variables.

5(2) - 2(-3)

Multiply.

10 + 6

Add.

16

b)

pq + pr

Substitute variables.

(2)(-3) + (2)(-1)

Multiply.

-6 - 2

Subtract.

-8

c)

pr²

Substitute variables.

(2)(-1)²

Square -1.

(2)(1)

Multiply.

2

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Find the area of a triangle formed by placing the vectors [3, 6] and [7, 1] tail-to-tail.
Usimov [2.4K]

Answer:

a. A=10u^{2}

b. View graph

c. 6.40u

Step-by-step explanation:

knowing that the triangle area is equal to base by heigh between two, then:

A=\frac{bh}{2}=\frac{5*4}{2}=10u^{2}

The length of the longest altitude of your triangle is:

c^{2}=a^{2}+b^{2}=5^{2}+4^{2}=25+16=41\\    c=\sqrt{41}=6.40u

finally it can be seen that the position of the triangle does not matter, as long as the base and heigh are maintained, the area of ​​the triangle will be the same

6 0
4 years ago
How do you do the number line of this question why do we need to flip the inequality
Phantasy [73]
I don't see an inequality, but I can tell you that the sign of the inequality is flipped whenever you multiply or divide by a negative number.
8 0
4 years ago
I really need help pleaseee on the ones I got wrong
Pachacha [2.7K]

Answer:

7. 2|x+2|-1

8. (-2,-1)

10. y≥2

Step-by-step explanation:

7. a|x-h|+k

Vertical stretch by a factor of two, horizontal shift left two, vertical shift down one

8. (h,k)

10. It should be y, but otherwise you are good

8 0
4 years ago
How do you do this <br> I don’t get it
Ierofanga [76]

Answer:

x= 65 z= 38 y= 77

Step-by-step explanation:

x=65° (opposite angles are equal)

z= 180°-[71+71 (bc the other side is also equal to 71)]

z= 180°-142°=38°

y= 180 - [sum of angle x (65°) and angle z (38°)]

y= 180 - 103= 77°

to make sure ur answer is correct the sum of angle x, y and z MUST = 180

lets check:

65° + 38° + 77° = 180°

:)

6 0
3 years ago
What is the volume of the prism?
babymother [125]
The volume of the prism is 1782

To find volume use base times height

To find base, use the triangle's area

The area of the triangle is 1/2(8×19) = 162

162 is the base amd the height is 11 so do 11 times 162

You should get 1782 as your answer


5 0
3 years ago
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