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larisa [96]
3 years ago
15

What is the value of -91/5 - 10 + 2/5+ 2(14 1/2-7)

Mathematics
1 answer:
Scorpion4ik [409]3 years ago
5 0

Answer:

Exact Form:

−64/5

Decimal Form:

−12.8

Mixed Number Form:

−12 4/5

Step-by-step explanation:

bc I used a calculator

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You guys are Smart, Answer me this. But I need It fast-
miss Akunina [59]

Answer:

E = 58

F = 32

G = 90

Step-by-step explanation:

3x + 31 + 5x -13 + 90 = 180

3x + 31 + 5x -13 = 90

8x = 90 - 31 + 13

8x = 72

x = 72 / 8

x = 9

E = 3(9) + 31 = 27+31 = 58

F = 5(9)-13 = 45 - 13 = 32

G = 90

8 0
2 years ago
a 23 gram sample of a substance thats a by-product of fireworks has a K-value of .13. whats the substances half life in days
nata0808 [166]
Given:
Initial mass, m₀ = 23 g
Decay constant, k = 0.13

Exponential decay obeys the equation
m(t)=m_{0} e^{-kt}
where t = time, days

For half life, the mass is m = m₀/2.
Therefore
e^{-0.13t} = \frac{1}{2} \\ -0.13t = ln(0.5)\\t= \frac{ln(0.5)}{-0.13} =5.33

Answer: The half life is 5.33 days
3 0
3 years ago
Read 2 more answers
Use the diagram to find the measure of
mixer [17]

Answer:

44°

Step-by-step explanation:

m∠MKN=44° (sum of angles in a triangle)

m∠KMJ=44° (definition of congruent angles)

3 0
2 years ago
coppers mother gives him $79 to the store, he buys 15 loaves of bread and 28 cartons of juice each bread is $3 and each juice ca
Leviafan [203]
He doesn't have a positive number. Add $45 and $112 together and it exceeds $79
3 0
2 years ago
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Which quadrilateral(s) have sides that are referred to as bases and legs
kompoz [17]

Answer:

trapeziod

Step-by-step explanation:

A trapezoid is a quadrilateral with only one pair of opposite sides parallel. The parallel sides are called bases, and the nonparallel sides are called legs. A segment that joins the midpoints of the legs is called the median of the trapezoid

3 0
2 years ago
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