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Ludmilka [50]
3 years ago
7

If 9+10=21 what is 21-9 ?

Mathematics
2 answers:
victus00 [196]3 years ago
8 0
Loll vines hehehehehehehe
babunello [35]3 years ago
5 0

Answer:

12

Step-by-step explanation:

21-9=12

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Simplify: (–8) • (6) – (5) • (–2)
horrorfan [7]

(–8) • (6) – (5) • (–2)

= (-8*6)-(5*-2)

= (-48)-(-10)

= -48+10

= -38

(–4) • (9) – (5) • (–2)

= (-4*9)-(5*-2)

= (-36)-(-10)

= -36+10

= -26

Evaluate 3(a – 4b) when a = –2 and b = 5.

= 3[-2 - 4(5)]

= 3[-2 -20]

= 3(-22)

= -66

Evaluate 4(a – 3b) when a = –4 and b = 6.

= 4[-4 - 3(6)]

= 4[-4 -18]

= 4(-22)

= -88

Evaluate 5(a – 2b) when a = –3 and b = 5.

= 5[-3 - 2(5)]

= 5(-3 - 10)

= 5(-13)

= -65

6 0
3 years ago
Read 2 more answers
There are 20 boys and 18 girls in a class find the percentage of {1} boys {2} girls, in the class
Viktor [21]

Answer:

1. 52.63% 2. 47.36%

Step-by-step explanation:

20 + 18 = 38 total people

20 divided by 38 = 0.5263 to 52.63%

18 divided by 38 = 0.4736 to 47.36%

Hope this helps!

5 0
2 years ago
In a rainforest food chain, caterpillars and butterflies eat orchid plants. Toucans eat the caterpillars and butterflies. Leopar
grandymaker [24]

Answer:b

Step-by-step explanation:

7 0
4 years ago
In ΔRST, r = 210 cm, s = 500 cm and t=560 cm. Find the measure of ∠T to the nearest 10th of a degree.
Virty [35]

Answer:

95.3

Step-by-step explanation:

7 0
3 years ago
Find dy/dx by implicit differentiation. 3x + y = 8 + x2y2
Vlada [557]
3 +dy/dx = 0+ 2x²ydy/dx + 2xy²
dy/dx - 2x²ydy/dx = 2xy² -3
(1 - 2x²y) dy/dx = (2xy²-3)/(1-2x²y)
8 0
4 years ago
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