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3 years ago

If a^2 -b^2 =12 and a-b=4 what is the bay of a +b

Mathematics

1 answer:

slava [35]3 years ago

7 0

Answer:

a+b = 3

Step-by-step explanation:

a = b+4

a^2 = (b+4)(b+4) = b^2 + 8b +16=-b^2 = 12

8b=-4

b = - 1/2

a = 3.5

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2(rt-4+2) when r=5 and t=2

Whitepunk [10]

Answer:

Step-by-step explanation:

2(5x2-4+2)=2(10-4+2)=2x4=8

8 0

3 years ago

the ratio of the sides of a triangle is 20:19:20. If the perimeter of the triangle is 354 inches, what are the lengths of all th

ch4aika [34]

Answer:

20*6 - 120

20*6 = 120

19 * 6 = 114

Step-by-step explanation:

Call x the scale factor.

20x + 19x + 20x = 354 Add the left side together.

59x = 354 Divide by 59

59x/59 = 354/59 Combine and cancel

x = 6

The lengths of the sides are

20 * 6 = 120

19 * 6 = 114

20 * 6 = 120

Total 354 Check

5 0

3 years ago

What is 1 & 5/7 times 2 & 3/4

VARVARA [1.3K]

The solution of $1\frac{5}{7} \times 2\frac{3}{4}$ is $\frac{33}{7} \text{ or } 4.714$

Solution:

Given that we have to find the solution of given expression

Given expression is:

$1\frac{5}{7} \times 2\frac{3}{4}$

Let us first convert the mixed fraction to improper fraction

Multiply the whole number part by the fraction's denominator.

Add that to the numerator.

Then write the result on top of the denominator.

Therefore,

$1\frac{5}{7} = \frac{1 \times 7+5}{5} = \frac{12}{5}$

$2\frac{3}{4} = \frac{2 \times 4+3}{4}=\frac{11}{4}$

Now the expression becomes,

$1\frac{5}{7} \times 2\frac{3}{4} = \frac{12}{7} \times \frac{11}{4}$

Solve and simplify the above expression

$1\frac{5}{7} \times 2\frac{3}{4} = \frac{12}{7} \times \frac{11}{4} = \frac{33}{7}\\\\1\frac{5}{7} \times 2\frac{3}{4} = \frac{33}{7}$

In decimal form we get,

$\frac{33}{7}=4.714$

Thus the solution to given expression is found

5 0

4 years ago

Choose the fastest jogger.

Julli [10]

Answer:

Larry

Step-by-step explanation:

15divided by 2 is 7.5

Julie:4

Mike:6

Katie:6

4 0

3 years ago

Read 2 more answers

At the amusement park, each student is given $16 for food. This covers the cost of 2 meals plus $4 for snacks. How much money do

TEA [102]

So 'm' represents the cost of a meal, since the student is expected to buy 2 of them, the coefficient on the 'm' is 2. They are also budgeted $4 for snacks, so the total amount of money they can spend is 2 meals + $4 for snacks, which cannot be greater than 16.
2m+4=16.
m=6 dollars

3 0

4 years ago