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3 years ago

Write an expression to show the sum of 2j and 5 .

Mathematics

1 answer:

kogti [31]3 years ago

7 0

Answer:

2j+5 =

Step-by-step explanation:

"Sum" is a keyword for addition. so 2j + 5 would be your answer, I believe.

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Oksi-84 [34.3K]

Answer:

1) 47 %

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3) 37.5%

4) 6.4%

5) 3.8%

6) 26.666667%

7) 66.666667%

8) 160%

Step-by-step explanation:

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2 years ago

Two altitudes of a triangle have lengths 12 and 14. What is the longest possible length of the third altitude, if it is a positi

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3 years ago

X=A- B/A. How to find A? <br><br>

Airida [17]

Answer:

A = $\frac{ x+\sqrt{x^2+4b}}{2}, \frac{ x-\sqrt{x^2+4b}}{2}$

Step-by-step explanation:

First manipulate the equation as such,

$x=A-\frac{B}{A}$

$0=A - \frac{B}{A} - X$

$0=A^2 -AX - B$

Then use the quadratic formula,

$x= \frac{-b\pm\sqrt{b^2-4ac} }{2a}$ when, $0 = ax^2 +bx +c$ .

Which gives $A= \frac{ x+\sqrt{x^2+4b}}{2}, \frac{ x-\sqrt{x^2+4b}}{2}$ .

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3 years ago

The perimeter of the scalene triangle is 60 cm. The length of the longest side is 4 times that of the shortest side.

Dmitrij [34]

Answer:

Only option C: The shortest side can equal 7 cm.

Step-by-step explanation:

Let the length of the shortest side be x cm, then the length of the longest side is 4x cm. Let the length of the middle side be y cm. Note that

$x$

The perimeter is

$x+y+4x=60\\ \\5x+y=60$

A. The value x cannot be 40 cm, because then y is negative

B. If the longest side is 30 cm long, then

$4x=30\\ \\x=7.5\\ \\y=60-5\cdot 7.5=22.5$

But

$x+y=7.5+22.5=30\ cm$

This means that such triangle does not exist

C. If x=7 cm, then 4x=28 cm,

$y=60-5\cdot 7=25\ cm$

Since,

$7+25=32>28\\ \\7+28=35>25\\ \\25+28=53>7,$

such triangle exists and this option is possible

D. If x=25 cm, then y is negative

E. If x=5 cm, then 4x=20 cm and

$y=60-5\cdot 5=35\ cm$

But this triangle does not exist, because $5+20$

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3 years ago

Read 2 more answers

You need 2 cups of orange juice to make 3 quarts of punch. how much cups of orange juice do you need to make 3 gallons of punch?

AleksAgata [21]

To answer the question above, convert first the gallons to quarts. Each gallon is composed of 4 quarts such that 3 gallons is equal to 12 quarts. Dividing this value by 3 and multiplying by 2, the answer would be 8. Thus, 8 cups will be needed to make the juice.

7 0

3 years ago