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3 years ago

Simplify the expression by combining like terms: 5c2 + 13c + 4 – 7c + 9

Mathematics

2 answers:

Burka [1]3 years ago

7 0

Answer:

${5c}^{2} + 6c + 13$

Step-by-step explanation:

1) Collect like terms.

${5c}^{2} (13c - 7c) + (4 + 9)$

2) Simplify.

${5c}^{2} + 6c + 13$

Therefor, the answer is 5c² + 6c + 13.

PIT_PIT [208]3 years ago

3 0

Answer:

5c^2 +6c +13

Step-by-step explanation:

so we can see than 5c^2

and 13c - 7c are the same = 6c

and 4 +9 = 13

so answer will 5c^2 +6c +13

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The bottom of a ladder must be placed 2 1/2 feet from the wall. The ladder is 9 feet long How far above ground is the ladder tou

Gnoma [55]

Answer:

Step-by-step explanation:

$h=\sqrt{9^2-(\frac{5}{2} )^2}\\=\sqrt{81-\frac{25}{4} } \\=\sqrt{\frac{299}{4} } \\=\frac{\sqrt{299} }{2} \\\approx 8.6458\\\approx 8.65 ~ft$

7 0

3 years ago

Read 2 more answers

A train travels 51 kilometers in 4 hours, and then 69 kilometers in 5 hours. What is its average speed?

nata0808 [166]

add the mileage 51+69 = 120 km

add the times 4+5=9 hours

now divide the two

120/9 = 13.3 km per hour average speed

6 0

4 years ago

A string is cut into two pieces in the ratio 2 : 7. The difference between the lengths of the two pieces is 90cm. Find the lengt

Nataly_w [17]

Answer:the length of the shorter string= 36cm

Step-by-step explanation:

Let us assume the lengths are 2x and 7x since thery are in the ratio of 2 :7

Such that Length of the shorter string = 2x

and the longer string = 7x so that the difference in Length which is 90cm can be expressed as

7x- 2x= 90

5x= 90

x 90/5

x= 18

shorter string = 2 x = 2x 18= 36cm

Longer strring = 7x 18=126cm

5 0

3 years ago

If Maya orders a $1.89 drink, 3 cookies at $.99 each, and 2 slices of pizza at $2.50 each. How much did Maya pay for her order?

sweet [91]

Answer:

$9.86

Step-by-step explanation:

Frist you read the problem and you see that she pays $1.89 for one drink

so you write down $1.89

then 3 cookies for $0.99 so you multiply $0.99 by 3 and you get $2.97

so you write down $2.97

next 2 slices of pizza for $2.50 so you multiply 2 by $2.50 and you get $5.00

so you write that down

lastly you and the answers you wrote down and you get $9.86

Maya payed $9.86 for her order.

5 0

3 years ago

Dayami works at Future Shop and earns $10.50/h plus 6% commission on sales. Last

skad [1K]

<h2><u>Quick answer</u> :</h2>

$= \tt\$570$

<h2><u>Answer with steps</u> :</h2>

Money Dayami earns for an hour's work = $10.50

Number of hours Dayami worked last week = 40

Money Dayami would have gotten for her work :

$=\tt 10.50 \times 40$

$=\tt \$ \: 420$

Thus, money earned by Dayami for her work = $420

Total sales Dayami made last week = $2050

Money Dayami must have earned as commission :

= 6% of total sales

$= \tt6 \% \: of \: 2500$

$= \tt\frac{6}{100} \times 2500$

$=\tt \frac{15000}{100}$

$=\tt \$150$

Thus, money Dayami earned as a commission = $150

Dayami's weekly gross salary last week :

$= \tt420 + 150$

$=\color{plum} \tt \: \$570$

Thus, total salary = $570

Therefore, Dayami's gross salary last week =<u> $570</u>

7 0

3 years ago