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alexandr1967 [171]
4 years ago
11

Solve for a: 1/4a-17=-15

Mathematics
1 answer:
MAXImum [283]4 years ago
4 0
1/4a-17=-15
1/4a=-15+17
1/4a=2
(1/4*4)a=(2*4)
a=8

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denis23 [38]

Answer:

C. 5units

Step-by-step explanation:

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3 years ago
In this diagram, ABAC – AEDF. If the<br> area of ABAC = 6 in?, what is the<br> area of AEDF?
shepuryov [24]

Answer:

2.7 in²

Step-by-step explanation:

similar triangles have the same angles, and all side lengths (or other distances) of one triangle have the same scaling factor to the side lengths of the other triangle.

so, we know the relation between the 2 baselines is 2/3, as this is the factor to turn the baseline of the large triangle into the baseline of the smaller triangle.

in other words

EF = BC × 2/3

2 = 3 × 2/3

correct

how do we calculate the area of a triangle ?

Area = baseline × height / 2

from BAC we know

Area = 6

baseline = 3

height = ?

6 = 3 × height / 2

12 = 3 × height

height = 4

aha !

now, EDF has a height too that we need to calculate is Area. and this height has the same scaling factor compared to the larger triangle as the side lengths : 2/3

so, for EDF we know

Area = ?

baseline = 2

height = 4 × 2/3 = 8/3

therefore, the area is

Area = (2 × 8/3) / 2 = (16/3) / 2 = 8/3 = 2.66666... ≈ 2.7

the shirt answer would be :

we know from the 2 baselines that the scaling factor for each distance is 2/3.

for the area we need to multiply 2 distances, so that means we have to multiply both by 2/3. and so on the formula for the area we have to use 2/3 × 2/3.

2/3 × 2/3 = 4/9

=>

Area small = Area large × 4/9 = 6 × 4/9 = 24/9 = 8/3 ≈ 2.7

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3 years ago
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Answer:

Step-by-step explanation:

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Below is a piece of a local pizza place menu where Jacob works. Large Cheese Pizza $14.85 Large Supreme Pizza $16.90 Cheese Stic
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Answer:

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Step-by-step explanation:


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3 years ago
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You make party favors for an event. You tie 9 inches of ribbon around each party favor. Write an expression for the amount of ri
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<span>Need 9n inches of ribbon Cost is $0.75n Since you need 9 inches per party favor and you have n party favors, the amount of ribbon you need is 9 times n inches. So R = 9n inches Since the ribbon costs $3 per yard and our current equation is inches, we need to do a bit of conversion. There's 36 inches per yard and 9 inches per ribbon, so each yard of ribbon can make 36/9 = 4 ribbons for the party favors. So the cost per party favor will be one forth of the cost per yard of ribbon per party favor. So $3.00 / 4 = $0.75, making the cost equation: C = $0.75n</span>
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4 years ago
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