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Ray Of Light [21]
3 years ago
10

11. Describe and correct the error in evaluating the expression. –21-7)= -14

Mathematics
1 answer:
likoan [24]3 years ago
8 0

Answer: -28

Step-by-step explanation:

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URGENT WILL GIVE BRAINLIEST
Vinil7 [7]

Answer:

626.7 cm^{2}

Step-by-step explanation:

Consider the figure as a circle with radius 7.5 and a rectangle with width 30 and length 15.

CIRCLE

A = pi*r*r = pi*7.5*7.5 = 56.25pi =176.7

RECTANGLE

A = l*w = 15*30 = 450

176.7 + 450 = 626.7 cm^{2}

5 0
2 years ago
Read 2 more answers
Write a variable expression for this amount. 8 more than twice a number d
jarptica [38.1K]

2n+8 maybe try that i dont get the question..kinda confusing

6 0
3 years ago
Help please need asap!! Thank you
olganol [36]

Answer:

your welcome    

Step-by-step explanation:

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6 0
2 years ago
Question in picture. ty
sleet_krkn [62]

Answer:

input x = - 7

Step-by-step explanation:

A is modelled as y = 5x - 4

B is modelled as y = 3x + 8

We require output of A three times the output of B , then

5x - 4 = 3(3x + 8) ← distribute

5x - 4 = 9x + 24 ( subtract 9x from both sides )

- 4x - 4 = 24 ( add 4 to both sides )

- 4x = 28 ( divide both sides by - 4 )

x = - 7 ← input

5 0
3 years ago
Help<br> Simplify. 2−4÷2+2^3
Radda [10]
Hey there!

If we use pemdas:

P - Parentheses
E - Exponents
M - Multiplicatiom
D - Division
A - Addition
S - Subtractiom

We know we have to evaluate the exponent first. Two to the rid power is equal to 8. Therefore, we have:

2 - 4/2 + 8

Next, we do the division. -4/2 = -2, so we have:

2-2 + 8 = 0 + 8 = 8

Hope this helps!
3 0
4 years ago
Read 2 more answers
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