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3 years ago

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Question 8

1 answer:

mafiozo [28]3 years ago

8 0

Answer

Step-by-step explanation:

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If a/b = c/d, then ad = bc.

Nikolay [14]

Answer:

The statement is true

see the explanation

Step-by-step explanation:

we have the proportion

$\frac{a}{b}=\frac{c}{d}$

we know that

To solve the proportion multiply in cross

so

$(a)(d)=(b)(c)$

$ad=bc$

therefore

The statement is true

7 0

4 years ago

The sum of two numbers is 53 and the difference is 27. What are the numbers?

ikadub [295]

Answer:

The numbers are 39 and 14.

Step-by-step explanation:

Equation 1, sum of the numbers:

x + y = 53

Equation 2, difference of the numbers:

x - y = 25

System of equations:

x + y = 53

x - y = 25

----------------

2x = 78

x = 39

Solve for y:

39 + y = 53

y = 14

The numbers are 39 and 14.

8 0

3 years ago

Robert spent half of his savings on a new phone. He earns some money back by babysitting the neighbors for $45. What was his sav

g100num [7]

The answer is 169 I’m pretty sure

8 0

3 years ago

Four handbags and three school bags cost $2000 . The cost of the handbag is thrice as much as the school bag. If the cost of the

Annette [7]

I don't know mxmkdkxkdkdkd

8 0

3 years ago

Read 2 more answers

<img src="https://tex.z-dn.net/?f=4x%5E%7B2%7D%20%2B28x%2B49%3D0" id="TexFormula1" title="4x^{2} +28x+49=0" alt="4x^{2} +28x+49=

Harman [31]

Answer:

x = -7/2 multiplicity 2.

Step-by-step explanation:

4x^2 + 28x + 49 = 0

(2x + 7)(2x + 7) = 0

This is a perfect square.

2x + 7 = 0, so:

x = -7/2 multiplicity 2.

6 0

3 years ago