All categories

3 years ago

Find the numbers in d blank

Mathematics

2 answers:

slega [8]3 years ago

6 0

Lets say:
Top row: a + b = 8
bottom row: c - d = 6
left column: a + c = 13
right column: b + d = 8

As you know: a + b = 8
Also b + d = 8
so from here we know a = d

c -d = 6 then---> c - a = 6 (because a = d) -> a = c - 6
We know a + c = 13 then
(c - 6) + c = 13
2c -6 =13
2c = 19
c = 19/2 = 9.5

but c - a = 6
9.5 - a = 6
a = 9.5 - 6 =3.5

but a = d = 3.5

a + b = 8
3.5 + b = 8
b = 8 -3.5 = 4.5

so a = 3.5, b = 4.5, c = 9.5, d = a = 3.5

Result:
a + b = 3.5 + 4.5 =8
c - d = 9.5 - 3.5 = 6
a + c = 3.5 + 9.5 = 13
b + d = 4.5 + 3.5 = 8

Hunter-Best [27]3 years ago

5 0

The missing numbers would be 12-6

You might be interested in

What is the image point of (1, 4) after a translation left 5 units and down 3 units?

beks73 [17]

Answer:

(-4,1)

Step-by-step explanation:

for x you do:

1 - 5 = -4

for y you do:

4 - 3 = 1

so it is (-4,1)

8 0

3 years ago

3) What is the greatest common factor of 5x7, 30x4, and 10x3?

saveliy_v [14]

30 is the greatest common factor I think

6 0

3 years ago

Read 2 more answers

Drag the tiles to the correct boxes to complete the pairs not all tiles will be used match each quadratic graph to its respectiv

ch4aika [34]

Answer:

Part 1) The function of the First graph is $f(x)=(x-3)(x+1)$

Part 2) The function of the Second graph is $f(x)=-2(x-1)(x+3)$

Part 3) The function of the Third graph is $f(x)=0.5(x-6)(x+2)$

See the attached figure

Step-by-step explanation:

we know that

The quadratic equation in factored form is equal to

$f(x)=a(x-c)(x-d)$

where

a is the leading coefficient

c and d are the roots or zeros of the function

Part 1) First graph

we know that

The solutions or zeros of the first graph are

x=-1 and x=3

The parabola open up, so the leading coefficient a is positive

The function is equal to

$f(x)=a(x-3)(x+1)$

Find the value of the coefficient a

The vertex is equal to the point (1,-4)

substitute and solve for a

$-4=a(1-3)(1+1)$

$-4=a(-2)(2)$

$a=1$

therefore

The function is equal to

$f(x)=(x-3)(x+1)$

Part 2) Second graph

we know that

The solutions or zeros of the first graph are

x=-3 and x=1

The parabola open down, so the leading coefficient a is negative

The function is equal to

$f(x)=a(x-1)(x+3)$

Find the value of the coefficient a

The vertex is equal to the point (-1,8)

substitute and solve for a

$8=a(-1-1)(-1+3)$

$8=a(-2)(2)$

$a=-2$

therefore

The function is equal to

$f(x)=-2(x-1)(x+3)$

Part 3) Third graph

we know that

The solutions or zeros of the first graph are

x=-2 and x=6

The parabola open up, so the leading coefficient a is positive

The function is equal to

$f(x)=a(x-6)(x+2)$

Find the value of the coefficient a

The vertex is equal to the point (2,-8)

substitute and solve for a

$-8=a(2-6)(2+2)$

$-8=a(-4)(4)$

$a=0.5$

therefore

The function is equal to

$f(x)=0.5(x-6)(x+2)$

3 0

4 years ago

If you used 3/4 of the blue paint to make flames on one of the cars, and need 7 3/4 pints of blue paint to paint another car, wh

ki77a [65]

3/4 of 7 pints were used. of, in this case, means to multiply. 3/4 x 7= 21/4= 5 and 1/4 pints. Now we subtract 5 and 1/4 (because this is how much was used) from 7. 7- 5 and 1/2 = 1 and 1/2

If you have questions, feel free to ask.

5 0

3 years ago

ANSWER FOR BRAINLIEST AND 50 POINTS:

Elan Coil [88]

Answer:

mean=82.286

Rounded to the tenths place would be= 82.3

Step-by-step explanation:

The Mean is found by adding all of the values together

Then dividing it by how many values there are.

In this instance, all the values added up equal 576

576 now will be divided by how many temperatures are recorded.

576/7=82.286

82.286 Rounded to nearest tenth=82.3

4 0

3 years ago