3 years ago

Please help ASAP Don’t mind the first multi choice ignore it and look at the box Area=Cm2

Mathematics

1 answer:

choli [55]3 years ago

8 0

Answer:

1200 cm

Step-by-step explanation:

triangle = 1/2bh

1/2(50)20= 500

1/2 (50) 20= 500

1/2(10)20 = 100

1/2 (10)20= 100

then you add them all which gives you 1200

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Solve the system algebraically. y = 3 - x 3x + 4y = 1 What is the value of x? -11 17/2 11

PtichkaEL [24]

Y= 3 -x (1)

3x + 4y = 1 (2)

Substitute (1) for y in (2)

3x + 4(3 - x) = 1

Expand, simplify and then solve for x

3x + 12 - 4x = 1
3x - 4x = 1 -12
-x = -11

x = 11

6 0

3 years ago

Read 2 more answers

Brandy took 3 friends out for dinner. The cost of the meal was 46.15 she left the 20% tip what was the total cost including the

slega [8]

Answer: $55.35

Step-by-step explanation:

if the bill is $46.15, round it up to $46. Twenty percent of that is $9.20, found by moving the decimal point one place left. Add $9.20 to $46.15, and you get $55.35

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8 0

3 years ago

Sin 3A = cos (A – 70ᵒ), where A is an acute angle then<br> A = ________________ ᵒ.

romanna [79]

Answer:

A = 40°

Step-by-step explanation:

$\sin 3A = \cos (A – 70ᵒ) \\ \\ \cos(90 \degree - 3A) = \cos (A – 70ᵒ) \\ \{\because \: \cos(90 \degree - \theta) = \sin \theta \} \\ \\ (90 \degree - 3A) = (A – 70ᵒ) \\ \\ 90 \degree + 70ᵒ = 3A + A \\ \\ 160 \degree = 4A \\ \\ A = \frac{160 \degree}{4} \\ \\ \huge \red{ \boxed{A = 40 \degree}}$