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jasenka [17]
3 years ago
15

Simplify each expression.

Mathematics
1 answer:
kati45 [8]3 years ago
8 0

1:13x-14

2:-6x+21

3: 20x-18

4:5x+15

5:14n+36

6:-12n+17

7:8n+32

8:k-11

9:-7k+37

10:-13k+34

11:2k+7

12:x+52

13:-2x+21

14:3x+21

15:12y-11

16:-26u+25

17:-42u+42

18:13u-7

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What is the final amount if 893 is decreased by 2% followed by a further 7% decrease? Give your answer rounded to 2 DP.
Ber [7]

Answer:

813.88

Step-by-step explanation:

893 × (1 - 2%) × (1 - 7%)

893 × 0.98 × 0.93

= 813.8802

Rounded to two decimal places will give 813.88.

8 0
3 years ago
7x - y = - 1 + -7x + 3y = - 25
Fittoniya [83]
Hope this helps you out :D

It’s 2 equations so in order to solve the previous system, you can use different methods, as for example substitution or addition of equations. In this case, you use the second one, due to the fact you have 7x in one equation and -7x in the other equation. In this way you can easily eliminate variable x and then solve for y. With the value of y you can replace in any of the two equations and solve for x.

7x-y=-1
-7x+3y=-25

Summarizing, you proceed as follow:
- add up the given equations

7x - y = -1

-7x+3y=-25
——————
0 +2y=-26

- solve for y in the previous equation

2y=-26
y=-26/2
y=-13


- replace the obtained value of y in one of the given equations, and solve for x

7x-(-13)=-1

7x+13=-1

7x=-1-13

7x=-14

x=-14

x=-14/7

x=-2


Hence, the solution of the given systems of equation is:

X=-2

Y=-13

4 0
3 years ago
What is the measurement of angle p a 36B 64 c116 D 244​
slamgirl [31]

Answer:

b 64

Step-by-step explanation:

because p is just a mirror of o ,and o =64

5 0
2 years ago
Which is true regarding the graphed function f(x)?
mojhsa [17]
F(5) = -1 would be the correct answer.
4 0
3 years ago
Read 2 more answers
If the lengths of the legs of a right angle are 5 and 7, what is the length of the hypotenuse?
Natalija [7]

Answer:

7^2 + 5^2 = 49 + 25 = 74

hypotenuse = square root of 74

Answer is B

Step-by-step explanation:

6 0
2 years ago
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