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vfiekz [6]
3 years ago
6

4/r ​ = 5/7 need help please

Mathematics
1 answer:
Annette [7]3 years ago
7 0
The answer to the question is

5r= 28

r= 28/5
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Evaluate the expression when a= 4, b= - 2, and c= 7 - -> 5a - 9 (b - c)
ollegr [7]

Answer:

65

Step-by-step explanation:

Given the following question:

5a-9(b-c)
a = 4
b = 2
c = 7

In order to find the answer, we need to substitute the variables with the numbers given, and then solve using PEMDAS.

5\times4-9\times(2-7)
2-7=-5
5\times4-9\times-5
5\times4=20
20-9\times-5
9\times-5=-45
20--45
20+45=65
=65

Hope this helps.

8 0
2 years ago
Solve for x 14 x square+7x-6
irina [24]

Answer:

x=0.450765 or x=−0.950765

Step-by-step explanation:

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→ Find the product, sum and factors

Product = -6

Sum = 7

Factors = No factors

→ Since there are no factors utilise the quadratic formula

\frac{-b+-\sqrt{b^{2}-4ac } }{2a}

→ List the values of a, b and c

a = 14

b = 7

c= -6

→ Substitute into the formula

\frac{-7+-\sqrt{7^{2}-4*14*-6} }{2*14}

→ Simplify

x=0.450765 or x=−0.950765

8 0
3 years ago
Read 2 more answers
What is the average rate of change for this function for the interval from x=3 to x=5?​
timofeeve [1]

Answer:

B

Step-by-step explanation:

The average rate of change of f(x) in the closed interval [ a, b ] is

\frac{f(b)-f(a)}{b-a}

Here [ a, b ] = [ 3, 5 ]

From the table of values

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4 0
3 years ago
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Does anyone know this?
scoundrel [369]

Answer:

B is correct

Step-by-step explanation:

In order to simplify a square root, look at the number inside the square root. See its factors. For this problem, 100*2=200. The square root of 100 is 10, which you would take outside of the square root. This leaves 2 inside the square root, which cannot be further simplified.

8 0
3 years ago
The measure of a right angle plus the measure of a right angle equals the measure of a blank angle​
d1i1m1o1n [39]

Answer: A straight angle

Step-by-step explanation:

90 + 90 = 180

5 0
2 years ago
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