All categories

2 years ago

Find the value of two numbers if their sum is 78 and their difference is 22.

1 answer:

3 0

X+y=78
x-y=22
Make x the subject
22+y=x
substitute in 1st equation
(22+y)+y=78
22+2y=78
y=28
place 28 in any equation
x-(28)=22
x=50
therefore one value is 28 and the other is 50
Hope this helps

You might be interested in

(50 POINTS AND BRAINLIEST!)

topjm [15]

Answer:

type of angles is complementary

equation is (3x-5)+x=90

x=23.75

8 0

3 years ago

100 POINTS FOR BRAINLIEST! according to the image, whats the answer? Answer wisely for the full 100

stepan [7]

Answer:

Step-by-step explanation:

1. To find the area of a semicircle the formula is

$A=\frac{\pi r^2}{2} \\=\frac{\pi 1^2}{2} \\=6.283m^2$

The square

$A=a^2=2^2=4m^2\\6.283+4=10.283m^2$

2. Triangle

$A=\frac{ab}{2} \\=\frac{6*2.5}{2} \\=7.5m^2\\7.5*2=15m^2$

Rectangle

$A=wl=8*13=104m^2$

$104-15=89m^2$

Semicircle

$A=\frac{\pi r^2}{2} \\=\frac{\pi 3^2}{2} \\\\=14.137m^2$

Square

$A=a^2=6^2=36$

$36-14.137=21.863m^2$

3 0

2 years ago

Read 2 more answers

a cardboard box holds 31.25 cubic inches of creamy butter. The butter is molded into a square prism that is 5 inches long. How m

lesya [120]

Answer:

$62.5 \:in^2$

Step-by-step explanation:

Volume of the butter in the cardboard = 31.25 cubic inches

Length of the Molded Square Prism =5 Inches

Let the length of the square cross sectional area = x

Volume of the Prism $=x^2l$

Since l=5 Inches

$5x^2=31.25\\x^2=6.25\\x=2.5\: Inches$

Next, we determine the surface area of the New Cardboard box to be made.

Length of the Cardboard Box=5 Inches

Length of the square cross sectional area = 2.5 Inches

Total Surface Area $=2(x^2+xl+xl)=2(x^2+2xl)$

$=2(2.5^2+2(2.5)(5))\\=2(6.25+25)\\=2*31.25\\=62.5 \:in^2$

Therefore, $62.5 \:in^2$ of cardboard is needed,

4 0

2 years ago

Which place is the 4 in? 815.604 hundreds hundredths thousandths tenths

Aleonysh [2.5K]

Answer:

Hundredths I think :D

Step-by-step explanation:

4 0

2 years ago

Read 2 more answers

The GCF of two numbers is 850 neither number is divisible by the other what is the smallest these two numbers can be?

saul85 [17]

Began by dividing 850 by 1, then 2, then 3, and so on, and I made a list of the whole numbers.

They were 1, 2, 5, 10, 17, 25, 34, 50, 85, 170, 425, and 850

By inspection, the two smallest numbers which when multiplied together yielded 850 were 25 and 34.

5 0

2 years ago