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liberstina [14]
3 years ago
10

What is the area of this triangle?

Mathematics
2 answers:
r-ruslan [8.4K]3 years ago
7 0

Answer:

84

Step-by-step explanation:

21 time 8 divided by 2

Romashka [77]3 years ago
6 0

Answer:

84

Step-by-step explanation:

A=bh/2.

A=(21*8)/2

A=168/2

A=84

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Type the correct answer in the box. Write the standard form of the quadratic equation modeled by the points shown in the table b
White raven [17]
Y =ax² + bx +c

1) Point (0,7)

7 = a*0² +b*0 +c
c = 7
y=ax² + bx + 7

2) Point (1,4)
4=a*1² + b*1 + 7, ----> 4 = a +b + 7, ------> a+b= - 3
3) Point (2, 5)
5=a*2² + b*2 + 7, ----> 5=4a+2b +7,---> -2=4a+2b, ----> -1=2a + b

4)  a+b= - 3, ----> b= -3 - a (substitute in the second equation)
    2a+b= -1
2a - 3 - a = -1, ----> a - 3 = -1, a =2

5) a+b= - 3
    2 + b = -3
b = -5

y=2x² - 5x + 7

8 0
3 years ago
3(7v-5)-v(10v-9) how do is solve this problem
Alika [10]

3(7v-5)-v(10v-9) = 21v - 15 -10v² + 9v = - 10v² + 30v - 15

8 0
3 years ago
Given that R=9x+8y find x when y=8 and R=4
Ilya [14]

Answer:

Step-by-step explanation:

R = 9x + 8y

4 = 9x + 8*8

4 = 9x + 64

Subtract 64 from both sides

4 - 64 = 9x + 64 - 64

-60 = 9x

Divide both sides by 9

-60/9 = 9x/9

-20/3 = x

x = -6 2/3

8 0
3 years ago
Read 2 more answers
PLZ HELP! Need this ASAP! Thx so much!<br><br> Find m∠PMK<br><br> Plz show ur work!
max2010maxim [7]
In ∆MKP and ∆MNP

MK = MN

PK = NP

MP = MP

SO ∆MKP AND ∆MNP ARE CONGRUENT.

SO m<PMN = m<PMK


m<NMK = 50

=> m<PMN + m<PMK = 50

=> 2 m<PMK = 50

=> m<PMK = 50/2 = 25°
3 0
3 years ago
Hello do any one know this answer
natita [175]

Answer:

A: y = -2x^2

Step-by-step explanation:

The parent function would be y = x^2 since it is a parabola.

Since the function has a vertical stretch by 2, y = 2x^2.

Finally, the function is inverted so the final equation would be y = -2x^2

3 0
3 years ago
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