Ask question

Ask question

All categories

Svetllana [295]

3 years ago

10

Need help with question a

1 answer:

SVEN [57.7K]3 years ago

4 0

Answer:

1.8 cm

6.3 cm²

Step-by-step explanation:

AC⊥BC

BD=BC=x

(x+5)²+x²=7²
x²+10x+25+x²=49
2x²+10x- 24=0
x²+5x-12=0
x=1.8

BC= 1.8 cm

Area of ABC= 1/2*1.8*7= 6.3 cm²

You might be interested in

A number, added to its three quarters, is equal to its double decreased by 6. What is the number

faust18 [17]

Answer:

9

Step-by-step explanation:

i hope this is helpful........

7 0

3 years ago

∆ABC is rotated 100° counterclockwise about point P to create ∆A'B'C'. what is angle m C'A'B'?

dolphi86 [110]

The answer would be c, 70

7 0

3 years ago

Read 2 more answers

Five times the sum of a number and 27 is greater than or equal to six times the sum of that num

stepladder [879]

Question:

Five times the sum of a number and 27 is greater than or equal to six times the sum of that number and 26.

What is the solution set of this problem?

Answer:

$x \leq -21$

Step-by-step explanation:

Given

<em>Represent the number with x</em>

So:

$5 * (x + 27) \geq 6 * (x + 26)$

Required

Determine the solution set

$5 * (x + 27) \geq 6 * (x + 26)$

Open Both Brackets

$5 * x + 5 * 27 \geq 6 *x + 6 * 26$

$5x + 135 \geq 6x + 156$

Collect Like Terms

$5x - 6x \geq 156-135$

$- x \geq 21$

Multiply both sides by -1

$x \leq -21$

Hence, the solution set is $x \leq -21$

7 0

3 years ago

In the below system, solve for y in the first equation.

fiasKO [112]

The correct answer should be A.

4 0

3 years ago

Read 2 more answers

Did i do this correctly?

den301095 [7]

Yes u did do this correctly

5 0

3 years ago

Read 2 more answers