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8090 [49]
3 years ago
15

Evaluate 7j+5−8k j=0.5 k=0.25,

Mathematics
2 answers:
kramer3 years ago
8 0

Answer:

Evaluate 7j+5-8k when j=0.5 and k=0.25 Get the answers you need, now!

2 answers

Step-by-step explanation:

Sindrei [870]3 years ago
8 0

Answer:

6.5

Step-by-step explanation:

(7*0.5)+(5)-(8*0.25)

PEMDAS

Multiply 7 and 0.5= 3.5

Multiply 8 and 0.25= 2

3.5+5-2

Add 3.5 and 5= 8.5

Subtract 8.5 and 2= 6.5

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You have $125.60 in quarters and
Sloan [31]

Answer:

Quarters = q = 200

Dimes = d = 756

Step-by-step explanation:

Let

Dimes = d

Quarter = q

Value of each Dime = 0.10

Value of each Quarter = 0.25

d + q = 956 (1)

0.1d + 0.25q = $125.60 (2)

From (1)

d = 956 - q

Substitute d = 956 - q into (2)

0.1d + 0.25q = $125.60

0.1(956 - q) + 0.25q = $125.60

95.6 - 0.1q + 0.25q = $125.60

- 0.1q + 0.25q = 125.60 - 95.6

0.15q = 30

Divide both sides by 0.15

q = 30 / 0.15

= 200

q = 200

Substitute q = 200 into (1)

d + q = 956

d + 200 = 956

d = 956 - 200

= 756

d = 756

Therefore,

Quarters = q = 200

Dimes = d = 756

3 0
3 years ago
If the endpoints of AB are at (-4, 5) and (2, -7), what is the length of AB?​
Sonbull [250]

Answer:

The length of AB is 6\sqrt{5} units

Step-by-step explanation:

The rule of the distance between two points (x1, y1) and (x2, y2) is

  • d=\sqrt{(x2-x1)^{2}+(y2-y1)^{2}}

∵ The endpoints of AB are (-4, 5) and (2, -7)

→ Let point (-4, 5) be (x1, y1) and point (2, -7) be (x2, y2)

∴ x1 = -4 and y1 = 5

∴ x2 = 2 and y2 = -7

→ Substitute them in the rule above to find the length of AB

∵ AB=\sqrt{(2--4)^{2}+(-7-5)^{2} }=\sqrt{(2+4)^{2}+(-12)^{2}}

∴ AB=\sqrt{(6)^{2}+144}=\sqrt{36+144}

∴ AB=\sqrt{180}=6\sqrt{5}

∴ The length of AB is 6\sqrt{5} units

3 0
3 years ago
What is the gcf of 19 and 22
Mrrafil [7]
The GCF would simply be 1 because 19 is a prime number. This means that the only factors of 19 are 1 and 19, while the factors of 22 would be 1, 2, 11, and 22. The only factor they share is 1, so their greatest common factor is 1.
3 0
4 years ago
Ill give a brainliest if you can answer all three :))
Pavel [41]

Answer:

4. A

8. D

9. B

Step-by-step explanation:

4. started with 10 points: +10

lost 20 points: -20

won 45 points: +45

10-20+45

8. 11-(-8)

=19

9. 100-(-50)-2

=150-2

=148

PLS GIVE BRAINLIEST

6 0
3 years ago
Read 2 more answers
Simplify (8^4)−^16<br> Please and thank you
____ [38]

Answer:

(2³)⁴- (2⁴)

=(4096)-(16)

4018

3 0
3 years ago
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