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2 years ago

I am confused on this.

Mathematics

1 answer:

Ostrovityanka [42]2 years ago

5 0

Straight lines are 180 degrees and angle BCD is 110 degrees, and also AB and CB are the same which means 180-110=70 and 70 divided by 2 is 45 degrees so m angle A =45 degrees and m angle B= 90 degrees and ACB is 45 degrees

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A family buys a refrigerator that costs € 840 paying a 30% cash deposit and the rest in 6 monthly installments, what is the amou

krok68 [10]

Answer:

€98.

Step-by-step explanation:

A 30% deposit is 0.30 * 840

= €252.

So there is 840 - 252

= €588 left to pay.

The amount of each monthly instalment

= 588 / 6

= €98.

8 0

3 years ago

Read 2 more answers

Sarah has a brother who is 5 years younger than herself and another brother who is 8 years younger than herself. She observes th

ELEN [110]

Answer:

Sarah is 13 years old

Step-by-step explanation:

Represent Sarah's age with S

Her first brother's age with F

Her second brother's age with B

So, we have:

From the first statement, we have:

$S - F = 5$ ---- (1)

From the second, we have:

$S - B = 8$ ---- (2)

The product of their ages is 40.

First, we make F the subject in (1) and B the subject in (2)

$F = S - 5$

$B = S - 8$

Their product is represented as follows:

$F * B = 40$

Substitute values for F and B

$(S - 5) * (S - 8)=40$

Open bracket

$S^2 - 5S -8S + 40 = 40$

$S^2 - 13S + 40 = 40$

Subtract 40 from both sides

$S^2 - 13S = 0$

Factorize:

$S(S - 13) = 0$

Split:

$S = 0$ or $S - 13 = 0$

But Sarah's age can't be 0 because she has two younger brothers.

So, we stick to

$S - 13 = 0$

Make S the subject

$S = 13$

<em>Hence, Sarah is 13 years old</em>

3 0

2 years ago

R + 4 when r = 13 <br> Can u explain it

bogdanovich [222]

Answer: r + 4

Step-by-step explanation:

6 0

2 years ago

On a cold February morning, the radiator fluid in Stanley’s car is -18 degrees When the engine is running, the temperature goes

Vitek1552 [10]

To figure this out you first find the difference between -18 and 60, which is 78 you then just divide, 78/4.5 which is approximately 17.55 mins or 17.6 rounded.

7 0

3 years ago

Ann has to make payments twice a year on her health insurance. If each payment is $2,316, how much money should she budget for h

siniylev [52]

Answer:

$386

Step-by-step explanation:

If Ann has to pay $2316 twice a year

(every 6 months), then, we calculate

$2316/6 = $386 every month.

Hence, Ann's budget for health

insurance each month is $386.

Hope it helps!

5 0

2 years ago

I am confused on this.​

I am confused on this.