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3 years ago

Evaluate the expression 2x +y for x=7and y=6

Mathematics

2 answers:

ddd [48]3 years ago

5 0

Answer:

answer is 14

Step-by-step explanation:

2(7)=14

6(1)= 6

14+6=20

pemdas

parenthesis

exponents

multiplication

division

addition

subtraction

Andre45 [30]3 years ago

3 0

Answer: 20

Step-by-step explanation:

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A density curve of all the possible ages between 0 years and 25 years is in the shape of a triangle. What is the height of the t

Bad White [126]

Answer:

Step-by-step explanation:

Note that the area under a probability density curve must be 1.

The formula for the area of a triangle is A = (1/2)(base)(height).

Here the base is 25 units. Thus, A = 1 unit^2 = (1/2)(25 units)(height), or, after multiplying both sides of this equation by 2:

2 units^2 = ( 25 units)(height)

2 units^2

Then (height) = --------------------- = 0.08 unit

25 units

The height of the triangle is 0.08 unit.

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3 years ago

a football team gains 8 yards in one play, loses 5 yards in the next. What is the teams total yardage for the two plays

Ann [662]

The team gained a total of 3 yards. That is because they first gained 8 (0 + 8), then lost 3 (8 - 3).

6 0

3 years ago

There are 2820 cars in Farmington. The ratio of medium size cars to compacts is 7 to 5 and the ratio of compacts to full-size ca

oee [108]

Answer:

Number of full size cars = 900

Step-by-step explanation:

The ratio of medium size cars to compacts is 7 to 5 and the ratio of compacts to full-size cars is 8 to 9. Since compact cars are there in both ratios , we need to make the number in the ratio for compact cars to be the same.

$\frac{medium}{compact} = \frac{7}{5}$

Multiply by 8 on numerator and denominator

$\frac{medium}{compact} = \frac{56}{40}$

$\frac{compact}{full size} = \frac{8}{9}$

Multiply numerator and denominator by 5.

$\frac{compact}{full size} = \frac{40}{45}$

Ratio of medium, compact and full size are in ratio 56,40,45.

Total number of cars =2820.

(56 + 40 + 45)x = 2820

x = $\frac{2820}{141}$

x = 20

Number of full size cars = $20\times 45$ =900

3 0

3 years ago

The area of triangle PQR is 273 cm. Given that PQ = 12.8cm and PQR = 107°, find QR.

storchak [24]

$\text{Area of triangle} = \dfrac 12 \times PQ \times QR \times \sin \angle PQR \\\\\\\implies 273= \dfrac 12 \times 12.8 \times QR \times \sin 107^{\circ}\\\\\implies 273 = 6.4 \sin 107^{\circ} \times QR\\\\\\\implies QR = \dfrac{273}{6.4 \sin 107^{\circ}} = 44. 606~~ \text{cm}$

8 0

2 years ago

Find the area of the composite figure below

dangina [55]

Answer:

Step-by-step explanation:

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3 years ago